Improvement in the quality of an x-ray image by use of an intensifying screen, tube, or filter and by optimum exposure techniques. Digital processing methods are often employed.
Improvement of the quality of a picture by various techniques, including computer processing, digital filtering, echocardiographic techniques, light and ultrastructural MICROSCOPY, fluorescence spectrometry and microscopy, scintigraphy, and in vitro image processing at the molecular level.
A technique of inputting two-dimensional images into a computer and then enhancing or analyzing the imagery into a form that is more useful to the human observer.
A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task.
Screens which absorb the energy in the x-ray beam that has penetrated the patient and convert this energy into a light pattern which has as nearly as possible the same information as the original x-ray beam. The more light a screen produces for a given input of x-radiation, the less x-ray exposure and thus shorter exposure time are needed to expose the film. In most film-screen systems, the film is sandwiched between two screens in a cassette so that the emulsion on each side is exposed to the light from its contiguous screen.
Radiographic techniques used in dentistry.
A rapid, low-dose, digital imaging system using a small intraoral sensor instead of radiographic film, an intensifying screen, and a charge-coupled device. It presents the possibility of reduced patient exposure and minimal distortion, although resolution and latitude are inferior to standard dental radiography. A receiver is placed in the mouth, routing signals to a computer which images the signals on a screen or in print. It includes digitizing from x-ray film or any other detector. (From MEDLINE abstracts; personal communication from Dr. Charles Berthold, NIDR)
Collections of related records treated as a unit; ordering of such files.
Technique involving the passage of X-rays through oral structures to create a film record while a central tab or wing of dental X-ray film is being held between upper and lower teeth.
Information systems, usually computer-assisted, designed to store, manipulate, and retrieve information for planning, organizing, directing, and controlling administrative activities associated with the provision and utilization of radiology services and facilities.
Computer systems or networks designed to provide radiographic interpretive information.
Use of optic and geometric techniques to enhance radiographic image quality and interpretation. It includes use of microfocal X-ray tubes and intensifying fluoroscopic screens.
The application of dental knowledge to questions of law.
Extraoral body-section radiography depicting an entire maxilla, or both maxilla and mandible, on a single film.
A specialty concerned with the use of x-ray and other forms of radiant energy in the diagnosis and treatment of disease.
The third tooth to the left and to the right of the midline of either jaw, situated between the second INCISOR and the premolar teeth (BICUSPID). (Jablonski, Dictionary of Dentistry, 1992, p817)
The largest and strongest bone of the FACE constituting the lower jaw. It supports the lower teeth.
The most posterior teeth on either side of the jaw, totaling eight in the deciduous dentition (2 on each side, upper and lower), and usually 12 in the permanent dentition (three on each side, upper and lower). They are grinding teeth, having large crowns and broad chewing surfaces. (Jablonski, Dictionary of Dentistry, 1992, p821)
The failure by the observer to measure or identify a phenomenon accurately, which results in an error. Sources for this may be due to the observer's missing an abnormality, or to faulty technique resulting in incorrect test measurement, or to misinterpretation of the data. Two varieties are inter-observer variation (the amount observers vary from one another when reporting on the same material) and intra-observer variation (the amount one observer varies between observations when reporting more than once on the same material).
The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.
Tomography using x-ray transmission and a computer algorithm to reconstruct the image.
Methods developed to aid in the interpretation of ultrasound, radiographic images, etc., for diagnosis of disease.
A genus of the ascomycetous yeast in the family Saccharomycodaceae, order SACCHAROMYCETALES, that contributes to the spontaneous fermentation of cider. Anamorphic forms are in the genus KLOECKERA.
Sequential operating programs and data which instruct the functioning of a digital computer.
The misinterpretation of a real external, sensory experience.
Exclusive legal rights or privileges applied to inventions, plants, etc.
The portion of an interactive computer program that issues messages to and receives commands from a user.
One of a set of bone-like structures in the mouth used for biting and chewing.
A loose confederation of computer communication networks around the world. The networks that make up the Internet are connected through several backbone networks. The Internet grew out of the US Government ARPAnet project and was designed to facilitate information exchange.
The failure to retain teeth as a result of disease or injury.
The collective tissues from which an entire tooth is formed, including the DENTAL SAC; ENAMEL ORGAN; and DENTAL PAPILLA. (From Jablonski, Dictionary of Dentistry, 1992)
Muscles arising in the zygomatic arch that close the jaw. Their nerve supply is masseteric from the mandibular division of the trigeminal nerve. (From Stedman, 25th ed)
The act and process of chewing and grinding food in the mouth.
The mouth, teeth, jaws, pharynx, and related structures as they relate to mastication, deglutition, and speech.
The force applied by the masticatory muscles in dental occlusion.
A masticatory muscle whose action is closing the jaws; its posterior portion retracts the mandible.
The phase of orthodontics concerned with the correction of malocclusion with proper appliances and prevention of its sequelae (Jablonski's Illus. Dictionary of Dentistry).
Such malposition and contact of the maxillary and mandibular teeth as to interfere with the highest efficiency during the excursive movements of the jaw that are essential for mastication. (Jablonski, Illustrated Dictionary of Dentistry, 1982)
Skills, techniques, standards, and principles used to improve the art and symmetry of the teeth and face to improve the appearance as well as the function of the teeth, mouth, and face. (From Boucher's Clinical Dental Terminology, 4th ed, p108)
A dental specialty concerned with the prevention and correction of dental and oral anomalies (malocclusion).
A dental health survey developed to evaluate a patient's orthodontic treatment need and priority for orthodontic care. The index is based on an assessment of degree of MALOCCLUSION and the potential aesthetic and dental health benefit of the treatment under consideration.
The different methods of scheduling patient visits, appointment systems, individual or group appointments, waiting times, waiting lists for hospitals, walk-in clinics, etc.
Orthopedic appliances used to support, align, or hold parts of the body in correct position. (Dorland, 28th ed)
Devices used for influencing tooth position. Orthodontic appliances may be classified as fixed or removable, active or retaining, and intraoral or extraoral. (Boucher's Clinical Dental Terminology, 4th ed, p19)
Treatment methods intended to prevent the development of crooked teeth that involve the use of space maintainers for BABY TEETH lost early or removal of PRIMARY TEETH that don't come out on their own. Commonly used in pediatric dentistry.
The movement of teeth into altered positions in relationship to the basal bone of the ALVEOLAR PROCESS and to adjoining and opposing teeth as a result of loss of approximating or opposing teeth, occlusal interferences, habits, inflammatory and dystrophic disease of the attaching and supporting structures of the teeth. (From Boucher's Clinical Dental Terminology, 4th ed)
Presentation devices used for patient education and technique training in dentistry.
Dental devices such as RETAINERS, ORTHODONTIC used to improve gaps in teeth and structure of the jaws. These devices can be removed and reinserted at will.
A fleshy extension at the back of the soft palate that hangs above the opening of the throat.
A denture replacing one or more (but not all) natural teeth. It is supported and retained by underlying tissue and some or all of the remaining teeth.
Surgery performed on the ear and its parts, the nose and nasal cavity, or the throat, including surgery of the adenoids, tonsils, pharynx, and trachea.
A movable fold suspended from the posterior border of the hard palate. The uvula hangs from the middle of the lower border.

The effect of the antiscatter grid on full-field digital mammography phantom images. (1/1363)

Computer Analysis of Mammography Phantom Images (CAMPI) is a method for making quantitative measurements of image quality. This article reports on a recent application of this method to a prototype full-field digital mammography (FFDM) machine. Images of a modified ACR phantom were acquired on the General Electric Diagnostic Molybdenum Rhodium (GE-DMR) FFDM machine at a number of x-ray techniques, both with and without the scatter reduction grid. The techniques were chosen so that one had sets of grid and non-grid images with matched doses (200 mrads) and matched gray-scale values (1500). A third set was acquired at constant 26 kVp and varying mAs for both grid conditions. Analyses of the images yielded signal-to-noise-ratio (SNR), contrast and noise corresponding to each target object, and a non-uniformity measure. The results showed that under conditions of equal gray-scale value the grid images were markedly superior, albeit at higher doses than the non-grid images. Under constant dose conditions, the non-grid images were slightly superior in SNR (7%) but markedly less uniform (60%). Overall, the grid images had substantially greater contrast and superior image uniformity. These conclusions applied to the whole kVp range studied for the Mo-Mo target filter combination and 4 cm of breast equivalent material of average composition. These results suggest that use of the non-grid technique in digital mammography with the GE-DMR-FFDM unit, is presently not warranted. With improved uniformity correction procedure, this conclusion would change and one should be able to realize a 14% reduction in patient dose at the same SNR by using a non-grid technique.  (+info)

A new filtering algorithm for medical magnetic resonance and computer tomography images. (2/1363)

Inner views of tubular structures based on computer tomography (CT) and magnetic resonance (MR) data sets may be created by virtual endoscopy. After a preliminary segmentation procedure for selecting the organ to be represented, the virtual endoscopy is a new postprocessing technique using surface or volume rendering of the data sets. In the case of surface rendering, the segmentation is based on a grey level thresholding technique. To avoid artifacts owing to the noise created in the imaging process, and to restore spurious resolution degradations, a robust Wiener filter was applied. This filter working in Fourier space approximates the noise spectrum by a simple function that is proportional to the square root of the signal amplitude. Thus, only points with tiny amplitudes consisting mostly of noise are suppressed. Further artifacts are avoided by the correct selection of the threshold range. Afterwards, the lumen and the inner walls of the tubular structures are well represented and allow one to distinguish between harmless fluctuations and medically significant structures.  (+info)

Computerized analysis of abnormal asymmetry in digital chest radiographs: evaluation of potential utility. (3/1363)

The purpose of this study was to develop and test a computerized method for the fully automated analysis of abnormal asymmetry in digital posteroanterior (PA) chest radiographs. An automated lung segmentation method was used to identify the aerated lung regions in 600 chest radiographs. Minimal a priori lung morphology information was required for this gray-level thresholding-based segmentation. Consequently, segmentation was applicable to grossly abnormal cases. The relative areas of segmented right and left lung regions in each image were compared with the corresponding area distributions of normal images to determine the presence of abnormal asymmetry. Computerized diagnoses were compared with image ratings assigned by a radiologist. The ability of the automated method to distinguish normal from asymmetrically abnormal cases was evaluated by using receiver operating characteristic (ROC) analysis, which yielded an area under the ROC curve of 0.84. This automated method demonstrated promising performance in its ability to detect abnormal asymmetry in PA chest images. We believe this method could play a role in a picture archiving and communications (PACS) environment to immediately identify abnormal cases and to function as one component of a multifaceted computer-aided diagnostic scheme.  (+info)

3D angiography. Clinical interest. First applications in interventional neuroradiology. (4/1363)

3D angiography is a true technical revolution that allows improvement in the quality and safety of diagnostic and endovascular treatment procedures. 3D angiography images are obtained by reconstruction of a rotational angiography acquisition done on a C-arm (GE Medical Systems) spinning at 40 degrees per second. The carotid or vertebral selective injection of a total of 15 ml of non-ionic contrast media at 3 ml/sec over 5 seconds allows the selection of the "arterial phase". Four hundred sixty 3D angiographic studies were performed from December 1996 to September 1998 on 260 patients and have been analyzed in MIP (Maximum Intensity Projection) and SSD (Shaded Surface Display) views. The exploration of intracranial aneurysms is simplified and only requires, for each vascular axis, a biplane PA and Lateral run followed by a single rotational angiography run. The 3D angiography image is available on the workstation's screen (Advantage Workstation 3.1, GE Medical Systems) in less than 10 minutes after the acquisition of the rotational run. It therefore allows one to analyze, during the intervention, the aneurysm's angioarchitecture, in particular the neck, and select the best therapeutic technique. When endovascular treatment is the best indication, 3D angiography allows one to define the optimal angle of view and accurately select the microcoils dimensions. 3D angiography replaces the multiple oblique views that used to be required to analyze the complex aneurysms and therefore allows a reduction of the total contrast medium quantity, the patient X-ray dose and the length of the intervention time which is a safety factor. Also, in particular for complex cases, it brings additional elements complementing the results of standard 2D DSA and rotational angiograms. In the cervical vascular pathology, 3D angiography allows for a better assessment of the stenosis level and of dissection lesions. Our current research activities focus on the matching without stereotactic frame between 3D X-ray angiography and volumetric MR acquisition, which should allow us to improve the treatment of intracerebral arterio-venous malformations (AVMs).  (+info)

Radiolucent lines and component stability in knee arthroplasty. Standard versus fluoroscopically-assisted radiographs. (5/1363)

The radiolucent lines and the stability of the components of 66 knee arthroplasties were assessed by six orthopaedic surgeons on conventional anteroposterior and lateral radiographs and on fluoroscopic views which had been taken on the same day. The examiners were blinded as to the patients and clinical results. The interpretation of the radiographs was repeated after five months. On fluoroscopically-assisted radiographs four of the six examiners identified significantly more radiolucent lines for the femoral component (p < 0.05) and one significantly more for the tibial implant. Five examiners rated more femoral components as radiologically loose on fluoroscopically-assisted radiographs (p = 0.0008 to 0.0154), but none did so for the tibial components. The mean intra- and interobserver kappa values were higher for fluoroscopically-assisted radiographs for both components. We have shown that fluoroscopically-assisted radiographs allow more reproducible, and therefore reliable, detection of radiolucent lines in total knee arthroplasty. Assessment of the stability of the components is significantly influenced by the radiological technique used. Conventional radiographs are not adequate for evaluation of the stability of total knee arthroplasty and should be replaced by fluoroscopically-assisted films.  (+info)

Ectopic eruption of the maxillary canine quantified in three dimensions on cephalometric radiographs between the ages of 5 and 15 years. (6/1363)

The eruption paths of 20 ectopic maxillary canine teeth (10 right, 10 left) were measured in three dimensions on annual lateral and depressed postero-anterior cephalometric radiographs of 15 patients between the ages of 5 and 15 years and compared with the eruption of normal canines. It was found that between the ages of 8 and 12 years ectopic canines on the left side moved more anteriorly than the normally erupting canines and the same was true of the right canines between the ages of 7 and 12 years. While the ectopic canines moved occlusally, their vertical movement was less than normal which accounts for the clinical finding that canines are impacted in the palate at a high level. The average palatally ectopic canine always moves palatally, and never shares in the buccal movement shown by normally erupting canines between the ages of 10 and 12 years. It was interesting to find that the differences between growth of normal and ectopic canines in the lateral plane of space are present as early as 5-6 years.  (+info)

Angiographic correlation of CT calcification in the carotid siphon. (7/1363)

BACKGROUND AND PURPOSE: Calcification in the coronary arteries has been correlated with significant vessel stenosis. The predictive value of calcification within the carotid siphon has not been characterized; however, stenosis in the carotid siphon is potentially important in determining management of patients with ipsilateral carotid bifurcation stenosis. The purpose of this study was to determine optimal parameters for assessing carotid siphon calcification on head CT scans and to compare the CT findings with angiographic results. METHODS: We performed a retrospective review of patients referred for diagnostic carotid arteriography. Those patients who also had undergone a head CT study at our institution were selected. The CT scans and angiograms of 64 patients (128 vessels) were reviewed. Carotid siphon calcification on CT scans was characterized on brain and bone windows as mild, moderate, or severe. Comparison was then made with angiographic findings. RESULTS: The sensitivity and specificity of CT for depicting greater than 50% angiographic stenosis in the carotid siphon were 86% and 98%, respectively, for bone windows and 100% and 0%, respectively, for brain windows. The positive predictive value (PPV) for a stenosis of greater than 50% as evidenced by severe calcification was 86% on bone windows and 11% on brain windows. The PPV for mild and moderate calcification on bone windows was 2.5% and 0%, respectively. CONCLUSION: Severe CT calcification in the carotid siphon as characterized on bone windows correlates with a carotid siphon stenosis of greater than 50% as determined angiographically. Therefore, the identification of severe calcification offers a potential noninvasive method for identifying stenosis of the carotid siphon. This information may be essential in determining management and prognosis for patients with carotid bifurcation stenosis.  (+info)

Calcification in chronic maxillary sinusitis: comparison of CT findings with histopathologic results. (8/1363)

BACKGROUND AND PURPOSE: It is important to differentiate fungal from nonfungal sinusitis in order to determine the optimal treatment for chronic sinusitis. The purpose of this study was to describe the CT findings of calcifications in chronic fungal and nonfungal maxillary sinusitis. METHODS: Five hundred ten patients with pathologically proved chronic maxillary sinusitis were studied with unenhanced CT before undergoing sinonasal surgery. In 36 patients, the CT scans were reviewed retrospectively to ascertain the shape and location of intrasinus calcifications. RESULTS: Calcifications were found in 20 (51%) of 39 patients with fungal sinusitis and in 16 (3%) of 471 patients with nonfungal sinusitis. Direct histopathologic correlation was performed in two of 16 patients with nonfungal sinusitis who had intrasinus calcification. The location of intrasinus calcification was central in 95% of the patients with fungal sinusitis and peripheral in 81% of those with nonfungal sinusitis. Although calcifications with a nodular or linear shape were seen in both fungal and nonfungal sinusitis, fine punctate type calcifications were seen only in those with fungal sinusitis (50%) and round or eggshell type calcifications only in those with nonfungal sinusitis (19%). CONCLUSION: Intrasinus calcifications are different in location and shape between fungal and nonfungal maxillary sinusitis. Although intrasinus calcification is uncommon in nonfungal sinusitis, the CT finding of intrasinus calcification may be helpful for differentiating fungal from nonfungal maxillary sinusitis.  (+info)

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Latest Xray Mobile DR Digital Radiography System from Quality Digital Radiography System, Hangzhou konida medical instrument factory - a Wholesale Supplier from China.
The versatile CXDI-401C Digital Radiography System can upgrade your existing radiographic suite or can be retrofitted to an upright stand, universal stand, or imaging table and has a Cesium Iodide (CsI) scintillator, allowing for efficient x-ray absorption and high signal-to-noise performance.
Novo Portable Digital Radiography Systems for oil and gas, aerospace, shipyards, construction, munitions, railways, power lines and other applications.
OBJECTIVE: To evaluate the scatter, dose, and effective detective quantum efficiency (DQE) performance of a slot-scan digital chest radiography system compared with that of a full-field digital radiography system. METHODS: Scatter fraction of a slot-scan system was measured for an anthropomorphic and a geometric phantom by using a posterior beam-stop technique at 117 and 140 kVp. Measurements were repeated with a full-field digital radiography system with and without a 13:1 antiscatter grid at 120 and 140 kVp. For both systems, the effective dose was measured on posteroanterior and lateral views for standard clinical techniques by using dosimeters embedded in a female phantom. The effective DQEs of the two systems were assessed by taking into account the scatter performance and the DQE of each system. The statistical significance of all the comparative differences was ascertained by means of t test analysis. RESULTS: The slot-scan system and the full-field system with grid yielded scatter ...
PURPOSE: To evaluate the scatter, dose, and effective detective quantum efficiency (DQE) performance of a slot-scan digital chest radiography system compared with that of a full-field digital radiography system. MATERIALS AND METHODS: Scatter fraction of a slot-scan system was measured for an anthropomorphic and a geometric phantom by using a posterior beam-stop technique at 117 and 140 kVp. Measurements were repeated with a full-field digital radiography system with and without a 13:1 antiscatter grid at 120 and 140 kVp. For both systems, the effective dose was measured on posteroanterior and lateral views for standard clinical techniques by using dosimeters embedded in a female phantom. The effective DQEs of the two systems were assessed by taking into account the scatter performance and the DQE of each system. The statistical significance of all the comparative differences was ascertained by means of t test analysis. RESULTS: The slot-scan system and the full-field system with grid yielded ...
The long term objective is to develop x-ray systems that will minimize x-ray radiation dose to the patient during clinical diagnosis and routine screening, while maximizing the usefulness of data by applying advanced sensing and signal processing techniques. Near theoretical limit x-ray sensitivity can be achieved with advanced semiconductor detector arrays, so x-ray radiation dose can be reduced by more than an order of magnitude from that required by conventional screen-film systems. The inherently digital output of the detector array is ideally suited for Computed Radiology including electronic archiving and image transmission, image enhancement and analysis, and computer aided diagnosis. During Phase I, there are several specific aims: to produce a preliminary digital mammography system design to determine performance requirements for each of the subsystems; to design, fabricate, and test the critical detector arrays; to address the key detector packaging and system mechanical design issues; ...
Purpose: To automatically quantify the amount of missing tissue in a digital breast tomosynthesis system using four stair-stepped chest wall missing tissue gauges in the Tomophan™ from the Phantom Laboratory and image processing from Image Owl. Methods: The Tomophan™ phantom incorporates four stair-stepped missing tissue gauges by the chest wall, allowing measurement of missing chest wall in two different locations along the chest wall at two different heights. Each of the four gauges has 12 steps in 0.5 mm increments rising from the chest wall. An image processing algorithm was developed by Image Owl that first finds the two slices containing the steps then finds the signal through the highest step in all four gauges. Using the signal drop at the beginning of each gauge the distance to the end of the image gives the length of the missing tissue gauge in millimeters. Results: The Tomophan™ was imaged in digital breast tomosynthesis (DBT) systems from various vendors resulting in 46 cases ...
This invention relates to an optically coupled digital radiography method and apparatus for simultaneously obtaining two distinct images of the same subject, each of which represents a different x-ray
Samsung, an emerging leader in medical imaging technology, announces that the GC70 Digital Radiography (DR) system received FDA 510(k) clearance for t
The Kodak RVG 5100 system lets you capture and analyze high quality digital radiographs quickly and easily. Like all Kodak Dental Imaging System, it is designed to give you superior results and it is backed up by Kodak expert support team. Specifications True Image Resolution 14 lines/mm Theoretical Image Resolution 27.03 lines/mm Sensor Super CMOS with Fiber Optics Connection USB-2 High Speed Outer Dimension 27.5mm x 37.7 mm Dimension of Active Area 22 x 30 mm Matrix Dimension 1200 x 1600. ...
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To investigate whether quantitative radiomic features extracted from digital breast tomosynthesis (DBT) are associated with Ki-67 expression of breast cancer. This is a prospective ethically approved study of 70 women diagnosed with invasive breast cancer in 2018, including 40 low Ki-67 expression (Ki-67 proliferation index |14%) cases and 30 high Ki-67 expression (Ki-67 proliferation index ≥ 14%) cases. A set of 106 quantitative radiomic features, including morphological, grey/scale statistics, and texture features, were extracted from DBT images. After applying least absolute shrinkage and selection operator (LASSO) method to select the most predictive features set for the classifiers, low versus high Ki-67 expression was evaluated by the area under the curve (AUC) at receiver operating characteristic analysis. Correlation coefficient was calculated for the most significant features. A combination of five features yielded AUC of up to 0.698. The five most predictive features (sphericity,
Digital breast tomosynthesis (DBT), which was FDA approved in 2011, is rapidly emerging as the new standard of care for x-ray imaging of the...
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Breast tomosynthesis, or 3D mammography, is a technique using X-rays to produce a three dimensional picture of the breast and decrease false positive results.
Comparison of metal artifact in digital tomosynthesis and computed tomography for evaluation of phantoms. . Biblioteca virtual para leer y descargar libros, documentos, trabajos y tesis universitarias en PDF. Material universiario, documentación y tareas realizadas por universitarios en nuestra biblioteca. Para descargar gratis y para leer online.
TY - JOUR. T1 - Comparison of two-dimensional synthesized mammogram (2DSM) and conventional full-field digital mammogram (FFDM) for evaluation of breast cancer. AU - Choi, Gayoung. AU - Woo, Ok Hee. AU - Shin, Hye Seon. AU - Jang, Seonah. AU - Cho, Kyu Ran. AU - Seo, Bo Kyoung. PY - 2017/5/1. Y1 - 2017/5/1. N2 - Purpose To compare the diagnostic efficacy of 2DSM and FFDM for evaluation of breast cancer. Materials and methods A retrospective observer performance study was done by 3 breast radiologists. The diagnostic accuracy, image quality, and detailed lesion characterization of each 2DSM and FFDM were evaluated blindly to determine superior modality. Results The diagnostic accuracy was not significantly different between two modalities. The image quality was superior in 2DSM (p-value 0.0362). Conclusions 2DSM showed equivalent diagnostic accuracy and superior image quality to FFDM. Overall characterization of the lesion was better in 2DSM, and 2DSM showed superiority in evaluation of ...
Women recalled for further assessment of soft tissue abnormalities were recruited and received standard supplementary views (typically spot compression views) and two-view GE DBT. The added value of DBT in the assessment process was determined by analysing data collected prospectively by unblinded radiologists working up the cases.. Following anonymisation of cases, there was also a retrospective multireader review. The readers first read bilateral standard two-view digital mammography (DM) together with the supplementary mammographic views and gave a combined score for suspicion of malignancy on a five-point scale. The same readers then read bilateral standard two-view DM together with two-view DBT. Pathology data were obtained. Differences were assessed using ROC analysis. ...
Low-Dose Computed Tomography (LDCT) screening for Lung Cancer (LC) is currently suggested (grade of recommendation = 2B); nevertheless, radiation exposure and costs are still a problem. In Baseline results of SOS study, single-arm observational study of chest Digital Tomosynthesis (DT) in a LC at-risk population, we have shown a LC detection rate comparable to LDCT (0.98%), low effective radiation dose (0.13 mSv), and 1/6 cost of LDCT. DT is limited angle tomography that allows reconstruction of multiple image planes and provides high-resolution images in coronal planes. We present the results of the SOS study.. ...
DOI /s CHEST Analysis of the impact of digital tomosynthesis on the radiological investigation of patients with suspected pulmonary lesions on chest radiography Emilio Quaia & Elisa
Aunt Minnie (1/29) reports that digital breast tomosynthesis (DBT) is comparable to full-field digital mammography (FFDM) for identifying benign...
The Finnish company Biohit, established in 1988 and listed on the OMX Helsinki stock exchange since 1999, develops, manufactures and markets liquid handling products and diagnostic test systems for use in research, healthcare and industrial laboratories, as well as products for inactivating carcinogenic acetaldehyde in the gastrointestinal tract. ...
Use of digital breast tomosynthesis (DBT) demonstrated reduced callback rates and improved cancer detection when compared with mammography.
Use of digital breast tomosynthesis (DBT) demonstrated reduced callback rates and improved cancer detection when compared with mammography.
Authors: McCarthy AM, Kontos D, Synnestvedt M, Tan KS, Heitjan DF, Schnall M, Conant EF. Title: Screening outcomes following implementation of digital breast tomosynthesis in a general-population screening program.. Journal: J Natl Cancer Inst 106(11):-. Date: 2014 Nov. Abstract: BACKGROUND: Early data on breast cancer screening utilizing digital breast tomosynthesis (DBT) combined with digital mammography (DM) have shown improvements in false-positive and false-negative screening rates compared with DM alone. However, these trials were performed at sites where conventional mammographic screening was concurrently performed, possibly leading to selection biases or with complex, multireader algorithms not reflecting general clinical practice. Our study reports the impact on screening outcomes for DBT screening implemented in an entire clinic population. METHODS: Recall rates, cancer detection, and positive predictive values of screening were compared for 15571 women screened with DBT and 10728 ...
IMIX Americas Inc. company data, news, contact details and stock information. IMIX Americas, located in Sterling, VA, is a leading provider of cassette-free digital radiography systems for hospitals, clinics, imaging centers, and private ...
Mammography has proven to be an effective, cost-effective screening exam, which has reduced breast cancer mortality. Several technical modifications have bee...
Articles are a collaborative effort to provide a single canonical page on all topics relevant to the practice of radiology. As such, articles are written and edited by countless contributing members over a period of time. A global group of dedicated editors oversee accuracy, consulting with expert advisers, and constantly reviewing additions. Create new article ...
Articles are a collaborative effort to provide a single canonical page on all topics relevant to the practice of radiology. As such, articles are written and edited by countless contributing members over a period of time. A global group of dedicated editors oversee accuracy, consulting with expert advisers, and constantly reviewing additions. Create new article ...
June 12, 2014 -- Clinical trials for a high-resolution breast CT scanner will begin in Germany in early 2015, according to a talk by Willi Kalender, PhD, at the International Symposium on Multidetector-Row CT (MDCT). The hope is that the technology will outperform full-field digital mammography and breast tomosynthesis at equivalent dose levels. Discuss ...
In a radiographic image processing apparatus for generating synthesized image data by synthesizing a plurality of partial radiographic images generated by radiation that has passed through the same object, additional information added to each of the plurality of partial radiographic images is acquired. On the basis of the acquired additional information, it is determined whether synthesis is to be permitted. When it is determined that synthesis is not to be permitted, generation of the synthesized image data is inhibited.
Histogram equalisation (HE) is widely used to enhance the image contrast but it tends to over-enhance the image background brightness. Improvement schemes
Biology Animations includes selected, high quality biological animations; about cell biology, microbiology, genetics, immunology, cancer treatments and diagnosis.... ...
The Department of Radiology was started in the 1958 with an X-ray unit. Today we are equipped with State of art equipments with Digital X-ray, Full field digital Mammogram with Tomosynthesis, high end Ultrasound with color Doppler, 256 slice CT, 1.5 Tesla MRI, Bone Mineral density. We function 24 x 7 with interpretation of images by well qualified and experienced Radiologists.. Picture Archival and Communication Systems (PACS) was installed in 2006 for the first time in Coimbatore, in which all your Radiology images and reports are stored perpetually. We commit ourselves to. ...
Systems and methods that facilitate the presentation and assessment of selected features in projection and/or reconstructed breast images, such as calcifications that meet selected criteria of size, shape, presence in selected slice images, distribution of pixels that could be indicative of calcification relative to other pixels or of other image features of clinical interest.
RADIOLOGY (xrays). Xrays help us to find bone fractures, other diseases of the skeletal system, and to assess the size, shape and orientation of organs. We invested in a new xray machine a couple of years go to improve our image quality and we now have a modern, digtial radiography system to speed up these diagnostic procedures. Digital images appear automatically on the computer monitor within seconds of them been taken.. There is no chemical development in the dark room anymore and the images appear on a screen much like they do with a digital camera.. Images can then be tweaked by the software or magnified and adusted to achieve the best image quality.. ...
Siemens Healthineers (ETR: SHL) today announced FDA clearance of the YSIO X.pree, a ceiling-mounted radiography system.. YSIO X.pree comes with the MyExam Companion intelligent user interface, a new 3D camera for patient positioning and advanced collimation, and a new smart image processing engine.. The MyExam Companion user interface provides proactive guidance to help technologists of any skill level navigate a radiography procedure, according to Siemens. It also combines patient data such as gender and age with other user- or machine-observable, patient-specific information to identify optimal acquisition and reconstruction parameters for each patient and radiography procedure, the company said.. The 3D cameras virtual collimation feature was designed to enable technologists to adjust the size and shape of the X-ray beam via the touchscreen monitor and reduce the volume of irradiated patient tissue. The camera also has a smart virtual orthopedic feature designed to enable shorter preparation ...
October 29, 2010 - A wireless version of Fujifilms FDR D-EVO digital radiography (DR) X-ray detector will be making its world debut for the first time at RSNA 2010 in Chicago. The FDR D-EVO was released earlier this year. The wireless version will provide all of the benefits of a standard 14 x 17 inch cassette with the flexibility and image quality of a wireless detector. The new detector will offer increased flexibility in uses and in positioning and will provide a cost effective way for facilities to upgrade to digital. The FDR D-EVO Wireless requires FDA 510(k) clearance and is not yet available for sale in the United States. For more information: www.fujimed.com. ...
December 11, 2017 -- Digital breast tomosynthesis (DBT) screening costs more than a 2D mammography exam, but the technologys advocates argue that its more effective, with higher cancer detection and lower recall rates. So is the extra money worth it? Yes, according to research presented at the 2017 San Antonio Breast Cancer Symposium (SABCS). Discuss ...
DESCRIPTION (provided by applicant): It is widely believed that digital breast tomosynthesis (DBT) has the potential to replace mammography in the future, based on preliminary clinical results. At lea ... ...
We have two digital (DR) radiography systems in the practice providing high quality images in seconds, including a mobile system which can be used offsite.
Influence of estrogen deficiency and tibolone therapy on trabecular and cortical bone evaluated by computed radiography system in rats ...
Digital reproductions of any size made from images scanned from film or taken by an electronic camera are optimally sharpened in a system-wide operation. The images are captured by an imaging device having an electronic imager and subsequently reproduced in a reproduction device, both imaging and reproduction devices having respective modulation transfer functions. Initially, the imaging device modulation transfer function and the reproduction device modulation transfer function are stored in separate devices. After an image is captured with the imaging device, a system modulation transfer function is generated from the imaging device modulation transfer function and the reproduction device modulation transfer function. Then a sharpening function is generated from the system modulation transfer function and the sharpening filter function is applied to the image captured by the imaging device in order to sharpen the image.
FIELD: physics. SUBSTANCE: device includes a unit for obtaining a plurality of projection data that are output from a two-dimensional detector after capturing during tomosynthesis with a detector and a radiation source, a unit for filtering the projection data with a reconstruction filter, a unit for reconstructing tomosynthesis tomographic images through synthesis of filtered projection data that are modified with coefficients which indicate mutual arrangement of the detector and the radiation source corresponding to the projection data. EFFECT: faster reconstruction of tomosynthesis tomographic images. 25 cl, 8 dwg
Tomosynthesis, the 3D imaging technology, is offered in both our Concord and Westford locations. Tomosynthesis addresses a long-standing imaging challenge. The breast must be compressed during a mammogram in order to turn the three-dimensional structure into a two-dimensional image through which abnormalities may be detected. However, dense breasts can have overlapping tissue that causes image distortion, potentially resulting in a false positive and associated anxiety from having to return for a repeat mammogram. In fact, studies show that tomosynthesis reduces the patient callback rate by up to 40 percent. Tomosynthesis takes approximately four seconds longer per view while in compression than a mammogram. The exam exposes patients to slightly more radiation, but is still below government safety guidelines.. ...
Digital tomosynthesis provided greater accuracy than chest x-rays in the depiction of lung lesions among patients with pulmonary mycobacterial disease, according to a study published in the October edition of Radiology.
An analysis of a digitized image is provided. The digitized image is repeatedly convolved to form first convolved images, which first convolved images are convolved a second time to form second convolved images. Each first convolved image and the respective second convolved image representing a stage, and each stage represents a different scale or size of anomaly. As an example, the first convolution may utilize a Gaussian convolver, and the second convolution may utilize a Laplacian convolver, but other convolvers may be used. The second convolved image from a current stage and the first convolved image from a previous stage are used with a neighborhood median determined from the second convolved image from the current stage by a peak detector to detect peaks, or possible anomalies for that particular scale.
How to enhance data, both 2-D images and 3-D range maps, through localized histogram equalization, with examples and explanation.
This prospective national multicenter multivendor trial aims at determining the impact of the novel technique Digital Breast Tomosynthesis (DBT) in the assessment and screening for breast cancer. Mammography is the primary imaging modality for the early detection of clinically occult breast cancer.. Despite advances in mammographic technique, mammography is still limited with regard to both sensitivity and specificity. In the majority of cases these limitations arise from the masking of subtle breast cancer lesions by overlapping breast tissue.. DBT is a novel technique that tries to overcome these limitations by performing a 3D-reconstruction of breast tissue from multiple low-dose digital mammographic images acquired in several planes in a 15 to 50 degree angle.. Early studies indicate an advantage of DBT compared to the standard Full Field Digital Mammography (FFDM) in terms of an improvement of specificity without cutback in sensitivity.. Controversy continues over the use of DBT in ...
The recognition of small features of low contrast in the image recorded by an x-ray image intensifier is usually limited by photon noise. This detail-contrast perceptibility is dependent on the detective quantum efficiency (DQE) and the modulation transfer function of the imaging tube and associated scanning system. The DQE can be calculated for all input photon energies from the statistical behaviour of each stage of photon detection and amplification where quanta are lost or converted. The potential improvement to be obtained from any proposed design change can be estimated. The escape of characteristic photons from the input phosphor layer causes significant change to the performance particularly when gadolinium oxysulphide is employed for that purpose ...
Veterinary Radiography System Market Research Report by Technology (Computed Radiography, Digital Radiography, and Film Screen Radiography), by Product (Analog X-ray and Digital X-ray), by Application, by End User, by Region (Americas, Asia-Pacific, and Europe, Middle East & Africa) - Global Forecast to 2026 - Cumulative Impact of COVID-19New York, June 11, 2021 (GLOBE NEWSWIRE) -- Reportlinker.com announces the release of the report Veterinary Radiography System Market Research Report by Techn
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What is breast tomosynthesis?. Tomosynthesis, the latest in digital mammography, is a form of 3D mammography that works by using 3D technology to capture multiple images of the breast from different angles. Unlike conventional mammography, which produces a flat image, tomosynthesis produces a more detailed, multi-layered image of the breast tissue.. How tomosynthesis can help you. This 3D technology gives out dedicated womens radiologists the clearest and most detailed images for the fastest, most accurate results. This is especially important for women with dense breast tissue -- something only detected with a mammogram.. Tomosynthesis detects cancer up to 15 months earlier than traditional mammograms, reduces the risk of false positives and detects 41 percent more invasive breast cancers.*. Early detection saves lives. Schedule your 3D mammogram today. Gwinnett Medical Center Imaging has three convenient Atlanta-area locations in Lawrenceville, Duluth, and Hamilton Mill. Breast tomosynthesis ...
The Colour-Science i2e image enhancement plug-in for Photoshop is now allowing Photoshop users to use the Colour-Science i2e image enhancement technology within Photoshop or other compatible software. i2e is used today in many professional photo labs to enhance the quality of digital images before printing. With i2e the enhancement of digital camera images in Photoshop is done much faster then by using all the manual Photoshop operations need to obtain the same result. The automatic i2e image enhancement includes: - automatic color enhancement (ACE) - automatic contrast enhancement (ABE1) - automatic density (gamma) correction (ABE2) - local brightness enhancement in the shadows and highlights (SHE) - memory color enhancement of skin-, sky- and vegetation colors (MCE) - advanced unsharp masking preventing halo effects (USM ...
Mammography is currently the only documented effective imaging tool for breast cancer screening. However, the sensitivity of mammography may be reduced in dense breasts, and sometimes it is difficult to even perceive a very subtle cancer which presents as a small stellate lesion, or very faint microcalcifications, missed diagnosed thus occurs. Herein, some researchers in Western countries developed computer-aided detection (CAD) system to help radiologists detect subtle, easily overlooked findings to facilitate early breast cancer detection, and most of the research regarding CAD was used in screen-film mammography (SFM) system. Ikeda, et al, worked on the retrospective CAD usage of those negative mammograms which later developed breast cancers. CAD could correctly mark 40% of the areas on these mammograms reported negative previously that later developed evident cancers. However, 80% of these are only nonspecific findings, and do not warrant recall for additional workup even at retrospective ...
Under license from MGH, GE Healthcare will make a new three dimensional digital mammography service available to women after FDA approval. This technology was developed here at the MGH under the leadership of Daniel Kopans, MD.
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First study assess and quantify the image quality at two dose levels for an amorphous Silicon (a:Si) Cesium Iodide (CsI) flat panel system compared with a direct amorphous Selenium (a:Se) digital radiography system. Image quality of a:Si flat panel digital radiography proved to be superior to a:Se drum digital radiography using low-dose settings. Second study assess the image quality of subtracted soft tissue and bone images of a CsIdetector-based dual-energy system for chest radiography at varying dose levels. Radiation dose did not significantly influence the perception of dual-energy image quality. Next study assess the value of dual-energy chest radiography obtained using a cesium iodide flat-panel detector in addition to standard posteroanterior chest radiography for the detection of calcified chest abnormalities. When dual-energy images were added, sensitivity increased significantly. Brunner and Langers test revealed a highly significant difference between posteroanterior chest ...
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The goal of computed radiography (CR) acceptance testing is to establish the storage phosphor reader and phosphor screen baseline performance. Quality control testing then detects changes in the CR system that could affect radiographic image quality. These tests currently require multiple exposures that are laser printed on film, and evaluated subjectively and using optical density measurements. Soft copy digital images have rarely been used to characterize CR systems. This paper presents an automated test target for the acceptance and quality control testing of Kodak storage phosphor readers. By using digital images for testing, the CR system can be evaluated independent of laser printer, film, and film processing effects ...
An Image De-Noising Method Based on Intensity Histogram Equalization Technique for Image Enhancement: 10.4018/978-1-5225-2053-5.ch005: Image enhancement is a quantifying criterion for sharpening and enhancing image quality, where many techniques are empirical with interactive procedures to
Illinois Valley Community Hospital (Peru, Ill.) has ordered two of Carestreams digital radiography systems: a Kodak Directview DR 3000 and a Kodak Directview DR 7500. According to Carestrean, a provider of dental and medical imaging systems, the hospital also purchased the Kodak Directview Capture Link System, which links Directview CR and DR systems. This software delivers the ability to integrate CR images with DR studies and perform cassette processing and image review at any CR system, says the company. The hospital will use the DR 3000 system to conduct x-ray exams on its ambulatory patients, and will use the DR 7500 system to capture exams for trauma patients, says Carestream (Rochester, N.Y.). ...
Enhancing an image through increasing the contrast of the image is one effective way of image enhancement. To well enhance an image and suppress the produced noises in the resulting image, a multiscale top-hat selection transform-based algorithm through extracting bright and dark image regions and increasing the contrast between them is proposed. First, the multiscale top-hat selection transform is discussed and then is used to extract the bright and dark image regions of each scale. Second, the final extracted bright and dark image regions are obtained through a maximum operation on all the extracted multiscale bright and dark image regions at all scales. Finally, by using a weight strategy, the image is enhanced through increasing the contrast of the image by adding the final bright regions on and subtracting the final dark regions from the original image. The weight parameters are used to adjust the effect of image enhancement. Because the multiscale top-hat selection transform is used to ...
Women who undergo routine mammograms at the Marlborough Hospital Womens Imaging Center at 28 Newton St. in Southboro now have the latest screening and diagnostic technology available to them. The center is one of the first womens centers in the United States to offer breast cancer screening with a Selenia Dimensions digital mammography system, the latest generation of mammography equipment from Hologic, a womens healthcare company that is the world leader in breast cancer diagnosis and
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During the last year the image intensifier CCD detector developed at the ESRF [1] has been converted from a laboratory prototype to a routinely used detector system for diffraction experiments that produces useful data of high quality.. The image intensifier CCD system covers the energy range 6 - 30 keV with a detective quantum efficiency above 80 %, providing artefact free images of spatial resolution , 200 µm. The useful input field in the corrected flat field image has a diameter of about 185 mm. The optical image produced by the image intensifier is relayed in the standard set-up onto commercially available slow scan CCD cameras of typically 1000 x 1000 pixel resolution, which provide a signal dynamic range , 50,000 for an image read-out time £ 10 seconds.. These cameras are almost always controlled by PCs and their associated software, whereas the beamline control software package (SPEC) is operating on UNIX workstations. In order to operate the CCD cameras from SPEC, the controller card ...
Image enhancement filters process an image to enhance the appearance of an image either for visualization purposes or for further processing. Examples of image enhancement filters available in ITK are: anisotropic diffusion, Gaussian filter, and histogram equalization. ...
Health, ...Leesburg VA May 5 2014Breast tomosynthesis in the diagnostic workup... Tomosynthesis has been evaluated in screening populations and been sh...Five hundred thirty two patients who were recalled for a focal asymmet...The researchers found that additional full views and ultrasound were p...,Breast,tomosynthesis,after,screening,mammography,reduces,need,for,ultrasound,,biopsies,medicine,medical news today,latest medical news,medical newsletters,current medical news,latest medicine news
Traditional image enhancement techniques produce different types of noise such as unnatural effects, over-enhancement, and artifacts, and these drawbacks become more prominent in enhancing dark images. To overcome these drawbacks, we propose a dark image enhancement technique where local transformation of the pixels have been performed. Here, we apply a transformation method of different parts of the histogram of an input image to get a desired histogram. Afterwards, histogram specification technique has been done on the input image using this transformed histogram. The performance of the proposed technique has been evaluated in both qualitative and quantitative manner, which shows that the proposed method improves the quality of the image with minimal unexpected artifacts as compared to the other techniques.
Image enhancement involves improving the quality of a digital image in many ways by manipulating the image with software. The purpose of image enhancement is to improve the interpretability or perception of information in images for viewers, or to provide `better input for other automated image processing techniques.
Image enhancement services can enhance a very normal and dull image to look it like a professional and best quality image. These services have the capability to give your ordinary shots a look of digitally attractive and alluring picture. Image enhancement services involve the adjusting of saturation, balancing the colors, increasing or decreasing contrast to a satisfactory level, infusing appealing brightness, adjusting the density level, applying the appropriate filters, removing or inserting the beautiful backgrounds, cropping and removing blemishes and other such things which enhance the quality level of an image to make it much better.. Today Im going to show you how to give your photos a dreamy, romantic effect and then and text to it to personalize them.. This effect, especially well on portraits.. Open a photo you like to use, First click the Adjustment Layer icon and choose Gradient Map change the blend mode to screen.. ...
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What is Image Enhancement? The Nx Witness Image Enhancement feature gives users the ability to automatically enhance images and videos...
SIEMENS, UK, April 28, 2014 - Siemens Healthcare will demonstrate its range of mammography, ultrasound and MR breast imaging products at Symposium Mammographicum 2014. The exhibition, taking place at the Bournemouth International Center, will include solutions designed specifically for the provision of Womens Health, including the MAMMOMAT Inspiration™ Full Field Digital Mammography system with PRIME technology.
If youve not yet used video chat in Gmail, then youre really missing out. However, even as much of a fan as I am, I can see room for improvements. The new features, it seems, will really help to provide some better image enhancements to all users sometime soon. For now, though, you can check them out through Gmail Labs.. According to the Gmail Blog, heres a before and after of the image enhancement product: ...
Image Enhancement Professional. Ms. Willis earned her Masters in the Science of Leadership, B.A. of Interdisciplinary studies with an emphasis in Theology & Family from Grand Canyon University. Her educational experience includes Certification as a Temperament Life Coach with International Representative status as a Trainer in Creation Therapy, Ordination as a Licensed Minister.. Anita offers Leadership Value & Lifestyle Coaching to individuals and businesses pursuing the enrichment of human potential through reflective self-awareness of personal and professional temperament; and promoting the integration of self-leadership and values based decision management process.. Anitas professional background includes Leadership Value & Lifestyle Coaching and development for social service, for- profit and faith organizations. Included in her active coaching service and sales background is 25 plus years as an Advanced Therapeutic Esthetician, Image Enhancement Professional, and Ministry , Motivation & ...
Section meets COAS Arts & Humanities requirement Class Meets: MWF 11:15-12:05 BH208 Edgar Allan Poe not only wrote some of our finest tales of terror, but also practically invented the genre of analytic detective fiction. His literary career suggests that these two literary forms are in some way connected, and that what links them is a fascination with or before the unknown. By examining the ways in which various writers of detective and horror fiction manipulate their readers (as well as the reader s role in the creation of such texts), we will investigate the connection between mystery and horror. We will ask ourselves: Why do we like to be frightened, at least in literature? What purpose does a detective serve for his or her author and reader? What are the similarities between the criminals of detective fiction (and its detectives!) and the monsters of horror fiction? We will focus on texts in which horror and mystery are combined and consider the detective figures and writing strategies of ...
July 23, 2008 - Canon U.S.A. Inc. has expanded its line of digital radiography (DR) systems with the introduction of the Canon CXDI-60G Portable Flat Panel Detector, the companys ninth-generation flat panel detector, which now includes room-to-room installations, mobile X-ray systems and more.. The Canon CXDI-60G Portable Flat Panel Detector succeeds the Companys popular CXDI-31, a portable cassette-type DR system, introduced in September 2001. Offering a more ergonomic and portable form than its predecessor, the CXDI-60G Portable Flat Panel Detector realizes a new level of freedom and immediacy for diagnosis in the X-ray room and beyond. Thin, lightweight and robust, the CXDI-60G Portable Flat Panel Detector offers true portability and flexibility in high-quality DR. Added benefits include low power consumption and a detachable sensor cable for convenient maintenance and installation. The models detachable sensor cable, which provides power to the unit and transfers data, is designed to ...
Our study aimed to compare contrast-enhanced mammography with breast MRI in evaluating residual breast cancer in patients undergoing presurgical systemic treatment to shrink their tumour size, says Bhavika Patel, M.D., a radiologist at Mayo Clinics Arizona campus. We identified patients who had both contrast-enhanced digital mammography and MRI after treatment to shrink their tumours and before additional therapy or a mastectomy.. Dr. Patel and her colleagues conducted a retrospective review of contrast-enhanced digital mammography cases at Mayo Clinics Arizona campus between September 2014 and June 2016. Forty female patients met inclusion criteria. The mean age of study participants was 52.3 years. Thirty-four patients received chemotherapy, and six patients received endocrine therapy.. Researchers interpreted radiographic images in a blinded fashion and compared residual size on imaging to pathology from surgical samples. Their results indicated that both imaging modalities demonstrate ...
A typical RTR system consists of a image intensifier, CCD camera, image processor and high resolution TV monitor in addition to radiographic source. Image intensifiers used in X-radiography employ Csl as the input detector. With the increased use of neutrons as radiation source, real time neutron radiography is also being practised widely. Image intensifiers used in neutron radiography employ gadolinium as the input screen. Typical resolutions attainable with present day X-ray and neutron image intensifiers is of the order 45 Ip/cm in the nornial mode. It is well known that rare earth screens such as gadolinium oxysulphide are sensitive to photons as well. While such screens have been used in fluoroscopy, no systematic study has been made to evaluate their potential usage for real time applications using X-rays. One possible reason for this could be due to their non-linear response over the X-ray energy range. A systematic study was undertaken by the authors to study the resolution and ...
X-Ray Detectors are basically those instruments that are employed to gauge the flux, spatial distribution, spectrum, and the other related characteristics of X-Rays. They can be segregated into two major types imaging detectors and dose measurement devices. The analog X-Ray systems normally employ photographic plates and films for image detection. Nevertheless, as there has been a shift in technology from analog to digital X-ray systems, the photographic plates and films are have been substituted by digital image plates that are itself the flat panel detectors.. Flat panel detectors are said to be highly sensitive and they are much faster than a photographic film. As technology and demand for digital X-Ray systems is reaching great heights, the X-ray detectors will call for much stronger structure possessing high transmission capability, temperature endurance, as well as resistance to ionizing radiations. Market size on the basis of type spans flat panel detectors, charge coupled device (CCD) ...
TY - JOUR. T1 - Image quality and radiation dose of renal perfusion CT with low-dose contrast agent. T2 - a comparison with conventional CT using a 320-row system. AU - Asayama, Yoshiki. AU - Nishie, Akihiro. AU - Ishigami, K.. AU - ushijima, yasuhiro. AU - Kakihara, Daisuke. AU - Fujita, N.. AU - Morita, K.. AU - Ishimatsu, K.. AU - Takao, S.. AU - Honda, Hiroshi. PY - 2019/8/1. Y1 - 2019/8/1. N2 - AIM: To compare perfusion computed tomography (CT) with reconstructed image from source data using low-dose contrast agent and conventional 320-row CT for the evaluation of renal tumours. MATERIALS AND METHODS: Twenty-eight patients underwent conventional CT (C-CT) and 26 patients underwent perfusion CT with low-dose (40 ml) contrast agent. Image noise, arterial visualisation, the sharpness of the corticomedullary junction (CMJ), and overall image quality were each assessed using a four-point scale. The tumour detection rate for lesions ,4 cm (n=66) was also evaluated. Quantitative image parameters ...
The paper presents a medical image enhancement method taking the noise reduction and the contrast enhancement into consideration, as well as the possibilit
All analysis was based on digitized film mammograms. Analysis was based on the last pre-diagnostic mammographic image per woman, using the mediolateral oblique view of the breast contralateral to the future tumor. To avoid image acquisition bias related to suspected or diagnosed cancer we did not consider mammograms that were acquired later than 30 days before diagnosis. PD values were calculated by an automated ImageJ-based method developed and validated by Li et al. in 2012 [18]. This method attempts to mimic the outcome of the gold standard area-based PD measurement method, Cumulus [19], and a high correlation (r = 0.884) between the two methods was demonstrated.. Our aim was to study features of the dense area in the mammograms, which were obtained by three processing steps: pre-processing of the image, dense area selection, and feature extraction. First, the images were pre-processed by automatically removing nametags and other artifacts, as well as reducing contrast intensity differences ...
Advanced Driver Assistance Systems (ADAS) have become an inevitable part of most of the modern cars. Their use is mandated by regulations in some cases; and in other cases where vehicle owners have become more safety conscious. Vision / camera based ADAS systems are widely in use today. However, it is to be noted that the performance of these systems is depends on the quality of the image/video captured by the camera. Low illumination is one of the most important factors which degrades image quality. In order to improve the system performance under low illumination, it is required to first enhance the input images/frames. In this paper, we propose an image enhancement algorithm that would automatically enhance images to a near ideal condition. This is accomplished by mapping features taken from images acquired under ideal illumination conditions on to the target low illumination images/frames.The proposed method consists of four steps a) Pre- processing b) a coarse level segmentation of the ...
A subharmonic image rejection and image enhancement mixer for mixing millimeter wavelength signals using a low conversion loss technique is described. A local oscillator frequency from an external source is fed to a first subharmonic mixer and through a phase shifter to a second subharmonic mixer. The phase shifter delays the local oscillator signal by (90 /n), where n is the multiple of the subharmonic mixers and is greater than 1. The first and second subharmonic mixers mix the local oscillator frequency with an input signal, which includes a desired frequency and an image frequency, to produce an intermediate frequency having a desired component and an image component at a select phase. A 0 -90 hybrid separates and terminates the image component of the intermediate frequency. The input port that feeds the input signal to each subharmonic mixer is dimensioned so as to provide a virtual image short termination or an image short termination to a self-generated image signal from each subharmonic mixer,
A C-Arm machine categorizes itself as an advanced medical imaging device that works on the basic premise of the X-ray technology. They are fluoroscopy machines and are colloquially called as image intensifiers. However, technically, the image intensifier is only a part of the machine and it is called a detector. C-Arm gets its name from the C-shaped arm present in the device, which is used to connect the x-ray source and the detector. These C-Arm machines are widely used during orthopedic, complicated surgical, pain management (Anesthetics) and emergency procedures. Its Fluoroscopy technology enables the device to provide high-resolution X-ray images in real time so that the surgeons can monitor the progress of the procedure and take decisions accordingly. It is a non-invasive device, making it safe both during and after the screening procedures.. What is an X-ray image intensifier? ...
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Due to contrast deficiency and blurred details in some low-light images, this paper presents a low-light image enhancement method using multi-layer fusion and detail recovery. Firstly, V channel in HSV color space is copied to three layers: Retinex layer, brightness layer and detail layer. In Retinex layer, the combination of weighted guided image filtering and morphology eliminates halo phenomenon. Meanwhile brightness and details of images are enhanced by the improved Retinex. Adaptive normalization is adopted to enhance brightness further in brightness layer. In detail layer, the improved model of local linear is to obtain more details. Finally, a detail recovery based on pixel arrangement is performed to avoid partial fuzzy details caused fusion. Experimental results show that the proposed method can more effectively highlight image details and improve the contrast ...
3D Mammography, clinically known as, Digital Breast Tomosynthesis (DBT), obtains multiple images of the breast and reconstructs them to create a 3D image of the breast rather than a single image. This technology improves the detection of small cancers and has been shown to reduce the number of patients recalled for more imaging due to false positives. This is used for screening patients, and can also be utilized as an additional screening tool if a patients 2-D mammogram shows dense breast tissue. ...
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New PaintSupreme App Features Sophisticated Brush & Gradient Tools, Layer-based Image Editing, Full Vector Support, and Intuitive Interface at an Affordable Price Point. COLOGNE, Germany, Dec. 19, 2011 /PRNewswire/ -- BrainDistrict GmbH, developer of world-class image manipulation and enhancement technologies, today announced the availability of PaintSupreme, a powerful yet easy-to-use application for drawing, paining, and image enhancement. Originally created for BrainDistricts highly anticipated RaySupreme rendering and animation application, PaintSupreme is a fun and easy-to-use application that delivers stunning results at a price point that wont break the bank.. PaintSupremes super-powers include highly sophisticated brush & gradient capabilities with many options tools, and is the only product in this price range that offers full vector support capable of creating paths that all tools can be applied on (the path itself as well as path contents). PaintSupreme offers full layer-based ...
Agora provides an image enhancement API for users in social and entertainment scenarios to improve their appearance in a video call or live interactive video streaming. With this API, users can adjust settings such as the image contrast, brightness, sharpness, and red saturation, as shown in the following figure.. ...
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The HDRI Image Enhancement effect was created by CFandM in Filter Forge, a Photoshop plug-in. A very simple to operate filter for adding HDRI light to any image or photo.
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... image enhancement MeSH L01.224.308.380.600 - radiographic image enhancement MeSH L01.224.308.380.800 - dual-energy scanned ... computer-assisted image interpretation MeSH L01.700.508.100.158.600.680 - computer-assisted radiographic image interpretation ... computer-assisted image processing MeSH L01.224.308.189 - data compression MeSH L01.224.308.380 - ... projection radiography MeSH L01.224.308.410 - three-dimensional imaging MeSH L01.224.680 - mathematical computing MeSH L01.224. ...
... image enhancement MeSH E01.370.350.600.350.700 - radiographic image enhancement MeSH E01.370.350.600.350.700.060 - angiography ... radiographic image enhancement MeSH E01.370.350.700.700.060 - angiography, digital subtraction MeSH E01.370.350.700.700.690 - ... radiographic image interpretation, computer-assisted MeSH E01.370.350.350 - image interpretation, computer-assisted MeSH ... radiographic image interpretation, computer-assisted MeSH E01.370.350.700.710 - radiographic magnification MeSH E01.370.350.700 ...
... radiographic still image films), but the then superior diagnostic quality of the roentgenograph and their already alluded ... safety enhancement of lower radiation dose via shorter exposure prevented this from occurring. Another factor was that plain ... X-ray image intensifiers[edit]. Main article: X-ray image intensifier. The invention of X-ray image intensifiers in the 1950s ... Fluoroscopy (/flʊəˈrɒskəpi/[1]) is an imaging technique that uses X-rays to obtain real-time moving images of the interior of ...
Several types of contrast agent are in use in medical imaging and they can roughly be classified based on the imaging ... Most common contrast agents work based on X-ray attenuation and magnetic resonance signal enhancement. For radiography, which ... "Safe use of radiographic contrast media". Australian Prescriber, 33:19-22. Available at "Archived copy". Archived from the ... Gadolinium is used in magnetic resonance imaging as an MRI contrast agent. In the 3+ oxidation state the metal has seven ...
Magnetic resonance imaging (MRI) is useful for the evaluation of complex vascular lesions that involve the lymphatic system and ... Mao, Cui Ping; Jin, Yao Feng; Yang, Quan Xin; Zhang, Qiu Juan; Li, Xing Hua (January 2018). "Radiographic findings of ... with a IV contrast enhancement can be used for those cystic lesions found on the deeper layers of the skin. ... This idea was furthermore supported by radiographic studies that displayed large multiobulated cisterns that lay deep into the ...
... radiographic still image films), but the then superior diagnostic quality of the roentgenograph and their already alluded-to ... safety enhancement of lower radiation dose via shorter exposure prevented this from occurring. Another factor was that plain ... Both live moving images and recorded still images were available from the very beginning with simple equipment; thus, both " ... The addition of the camera enabled viewing of the image on a monitor, allowing a radiologist to view the images in a separate ...
... hyperechoic lesions with posterior acoustic enhancement. On CT or MRI scans, it shows peripheral globular/nodular enhancement ... The radiographic appearance is most commonly described as "popcorn" or "mulberry"-shaped. Computed tomography (CT) scanning is ... It shows a high signal on T2 weighted images. Asymptomatic lesions may not require treatment but may need to be monitored for ... November 2017). "Imaging features of rare mesenychmal liver tumours: beyond haemangiomas". The British Journal of Radiology. 90 ...
Barium swallow images show abnormalities in 80% of GIST cases. However, some GISTs may be located entirely outside the lumen of ... 5 cm), heterogeneous enhancement after contrast administration and ulcerations. Also, overtly malignant behavior (in ... Even if radiographic malignant features are present, these findings may also represent other tumors and definitive diagnosis ... Among imaging studies, MRI has the best tissue contrast, which aids in the identification of masses within the GI tract ( ...
T2 weighted imaging with fat suppression will show iso- or slight hyperintensity compared to muscle. There is also decreased ... Overall, radiographic features for idiopathic orbital inflammatory syndrome vary widely. They include inflammation of the ... In contrast-enhanced CT there is moderate diffuse irregularity and enhancement of the involved structures. A dynamic CT will ... The best imaging modality for idiopathic orbital inflammatory disease is contrast-enhanced thin section magnetic resonance with ...
... phase contrast imaging is used to enhance the contrast that would normally be possible from conventional radiographic imaging. ... Propagation-based phase contrast uses free-space propagation to get edge enhancement, Talbot and polychromatic far-field ... Phase-contrast imaging is a method of imaging that has a range of different applications. It exploits differences in the ... Phase-contrast imaging is the highest resolution imaging technique ever developed, and can allow for resolutions of less than ...
Drayer BP (1988). "Imaging of the aging brain. Part II. Pathologic conditions". Radiology. 166 (3): 797-806. doi:10.1148/ ... Drayer BP, Schmeckel DE, Hedlund LW, Lischko MM, Sage MR, Heinz ER, Dubois PJ, Goulding PL (1982). "Radiographic quantitation ... MRI Contrast Enhancement in the Central Nervous System. A Case Approach. (Assoc. Eds., Drayer BP, Haughton VM, Jinkins JR, ... Drayer BP, Burger P, Hurwitz B, Dawson D, Cain J, Leong J, Herfkens R, Johnson GA (1987). "Magnetic resonance imaging in ...
On MR imaging, the contents of the cyst display low to intermediate signal intensity on T1-weighted images and high signal ... The radiographic distinction between an enlarged dental follicle and a small dentigerous cyst can be difficult and fairly ... The lining of the cyst is thin with regular thickness and may show slight enhancement after contrast injection. The treatment ... The role of CT (computerized tomography) imaging in the evaluation of cystic lesions has been well-documented. CT imaging aids ...
Radiographic examination of cast metallic surgical implants ISO 9585:1990 Implants for surgery - Determination of bending ... image processing and environmental data representation - Procedures for registration of items ISO 9984:1996 Information and ... Remote database access for SQL with security enhancement ISO 9583:1993 Implants for surgery - Non-destructive testing - Liquid ... strength and stiffness of bone plates ISO/IEC 9592 Information technology - Computer graphics and image processing - ...
"Molecular Ultrasound Imaging Enhancement by Volumic Acoustic Radiation Force (VARF): Pre-clinical in vivo Validation in a ... Ultrasonic molecular imaging is safer than molecular imaging modalities such as radionuclide imaging because it does not ... Ultrasound imaging allows real-time evaluation of blood flow.[20]. *Destruction of microbubbles by ultrasound[21] in the image ... which is the measure of the negative acoustic pressure of the ultrasound imaging system. Increasing MI increases image quality ...
There is also substantial bone marrow enhancement. Sagittal T1-weighted fat-suppressed post gadolinium image showing the extent ... Neoplasm such as Ewing sarcoma and osteomyelitis could both have this plain radiographic appearance. Staphylococcus was ... Fat saturated STIR (short tau inversion recovery) image showing hyperintense edema in the calf musculature, marrow edema, and ... Coronal fat suppressed STIR image showing, bone marrow and subcutaneous edema as well as subperiosteal edema. The thin ...
While it provided good image enhancement, its use was abandoned in the late 1950s since it turned out to be carcinogenic. Given ... Lee SY, Rhee CM, Leung AM, Braverman LE, Brent GA, Pearce EN (6 November 2014). "A Review: Radiographic Iodinated Contrast ... Magnetic resonance imaging (MRI) functions through different principles and thus MRI contrast agents have a different mode of ... Barium sulfate is mainly used in the imaging of the digestive system. The substance exists as a water-insoluble white powder ...
Several types of contrast agent are in use in medical imaging and they can roughly be classified based on the imaging ... Thomson, K; Varma, D (2010). "Safe use of radiographic contrast media". Australian Prescriber, 33:19-22. Available at .mw- ... Most common contrast agents work based on X-ray attenuation and magnetic resonance signal enhancement. ... Gadolinium is used in magnetic resonance imaging as an MRI contrast agent.[3] In the 3+ oxidation state the metal has seven ...
Two forms of radiographic images are in use in medical imaging. Projection radiography and fluoroscopy, with the latter being ... diffusion weighted imaging (DWI-MRI), dynamic contrast enhancement (DCE-MRI), and spectroscopy (MRI-S). For example, imaging of ... This imaging modality utilizes a wide beam of x rays for image acquisition and is the first imaging technique available in ... Images of the same subject produced with two different imaging systems may be correlated (called image registration) by placing ...
Two forms of radiographic images are in use in medical imaging. Projection radiography and fluoroscopy, with the latter being ... diffusion weighted imaging (DWI-MRI), dynamic contrast enhancement (DCE-MRI), and spectroscopy (MRI-S). For example, imaging of ... This imaging modality utilizes a wide beam of x rays for image acquisition and is the first imaging technique available in ... Photoacoustic imagingEdit. Main article: Photoacoustic imaging in biomedicine. Photoacoustic imaging is a recently developed ...
When T1-weighted imaging is contrast-enhanced through the addition of gadolinium, the open ring enhancement can be viewed as a ... 2008). "Clinical and radiographic spectrum of pathologically confirmed tumefactive multiple sclerosis". Brain. 131 (7): 1759- ... T1-weighted imaging and T2-weighted imaging. Using T1-weighted imaging, the lesions are displayed with low signal intensity, ... T2-hypointense rim and incomplete ring enhancement of the lesions on post-gadolinium T1- weighted imaging on brain MRI enable ...
Initial imaging includes a noncontrast phase to detect renal calculi as a source of hematuria. Note that dual energy CT may ... Contrast enhancement techniques for CTU vary from institution to institution. A common technique is a double bolus, single ... Frank, Eugene D.; Long, Bruce W.; Smith, Barbara J. (2012). Merrill's Atlas of Radiographic Positioning & Procedures (12 ed.). ... Excretory phase imaging allows for not only evaluation of the ureteral lumen, but also periureteral abnormalities including ...
However, if simple laboratory tests and imaging have excluded more serious conditions, it is reasonable to monitor for a ... Cognitive behavioral therapy and motivational enhancement therapy are evidence-based outpatient treatment options for patients ... and plain flat radiographic series. Prior to diagnosing and treating for a presumed CHS, more serious medical conditions need ...
K-edge imaging can be used to either enhance and quantify, or to suppress a contrast agent. Enhancement of contrast agents can ... "An examination of silver as a radiographic contrast agent in dualenergy breast X-ray imaging, IWDM 2012, LNCS". 7361: 418-425. ... Dual-energy imaging, i.e. imaging at two energy levels, is a special case of spectral imaging and is still the most widely used ... "Dose reduction in mammography with photon counting imaging". Proc. SPIE 5368, Medical Imaging 2004: Physics of Medical Imaging ...
Often, images are taken both with and without radiocontrast. CT images are called precontrast or native-phase images before any ... In males at 30 years of age, there is an estimated 0.027 HU of liver parenchymal enhancement per kilogram of body weight and ... "What you should know about prophylaxis and treatment of radiographic and magnetic resonance contrast medium extravasation". ... Images are acquired at a rate as fast as the contrast moving through the blood vessels. This method of imaging is used ...
Resolution enhancement[edit]. CLSM is a scanning imaging technique in which the resolution obtained is best explained by ... allowing faster image acquisition: four images per second with 512 lines each. Hugely magnified intermediate images, due to a 1 ... The Development of a Modern Microscopy". Imaging & Microscopy.. online. *^ a b c Barry R. Masters: Confocal Microscopy And ... Variants and enhancements[edit]. Improving axial resolution[edit]. The point spread function of the pinhole is an ellipsoid, ...
"Pedicle screw placement accuracy using ultra-low radiation imaging with image enhancement versus conventional fluoroscopy in ... from SafeRay Spine and launched the product in 2018 as a fluoroscopy system that enhances the clarity of radiographic images. ...
1996). "MR imaging of spinal nerve roots: techniques, enhancement patterns, and imaging findings". Am. J. Roentgenol. 166 (1): ... 1985). "The radiographic evaluation of the symptomatic postoperative lumbar spine patient". Spine. 10 (7): 652-61. doi:10.1097/ ... Newer MRI imaging techniques have clarified this dilemma somewhat. Conversely, a recurrent disc can be difficult to detect in ... 1991). "MR imaging of intradural inflammatory diseases of the spine". AJNR Am J Neuroradiol. 12 (5): 1009-19. PMID 1950896. ...
Signal enhancement by extravascular water protons (SEEP fMRI). Notes[edit]. Citations[edit]. *^ "Magnetic Resonance, a critical ... In general, fMRI studies acquire both many functional images with fMRI and a structural image with MRI. The structural image is ... This could be either those sections of the image that repeat often in a spatial map (that is small clusters dotting the image ... This spiral imaging sequence acquires images faster than gradient-echo sequences, but needs more math transformations (and ...
Other imaging[edit]. Other potential forms of medical imaging of pulmonary nodules include magnetic resonance imaging (MRI) or ... Enhancement: If the exam is done as a combined non-contrast and contrast CT, a solitary nodule with an enhancement off less ... "Pulmonary Coccidioidomycosis: Pictorial Review of Chest Radiographic and CT Findings". RadioGraphics. 34 (4): 912-925. doi ... "Insights into Imaging. 9 (1): 73-86. doi:10.1007/s13244-017-0581-2. ISSN 1869-4101. PMC 5825309. PMID 29143191.. ...
noted the radiographic (x-ray) measurements provided an indication of meniscus size based on the width of the tibial plateau. ... Haut, TL; Hull, ML; Howell, SM (Mar 2000). "Use of roentgenography and magnetic resonance imaging to predict meniscal geometry ... Anz, AW; Rodkey, WG (Jun 2012). "Biological enhancement of meniscus repair and replacement". Sports Medicine and Arthroscopy ... Matching by sex, height, and weight has been shown to be nearly as accurate as radiographic techniques (0.72 correlation of ...
April 2008). "In vivo MR imaging of hippocampal lesions in multiple sclerosis". J Magn Reson Imaging. 27 (4): 726-31. doi: ... They do not spread into the subcortical white matter and never show gadolinium enhancement. Over a one-year period, CLs can ... 2008). "Clinical and radiographic spectrum of pathologically confirmed tumefactive multiple sclerosis". Brain. 131 (Pt 7): 1759 ... Clinical MR imaging: a practical approach.[2] Dawson fingers, at Radiopedia Suzanne Palmer, William G. Bradley, Dar-Yeong Chen ...
In a radiographic study of almost 2,000 lung cancer patients published 50 years ago, 3.4% of lung carcinomas proved to be ... A trend toward less vascularity and tissue density (with lower contrast enhancement on CT) has been noted toward the center of ... imaging of tumors hosted in nude mice". Cancer Res. 50 (11): 3445-52. PMID 2334941. Taya Y, Hosogai K, Hirohashi S, et al. ( ... These sorts of areas often show low levels of contrast enhancement on CT scanning. Low encapsularity and high levels of tissue ...
Cancer recurrence rates after surgical resection can be as high as 15-20%.[citation needed] MR imaging improves early detection ... Although enzalutamide may improve radiographic progression-free survival to the greatest extent, longer follow-up is needed to ... Thus, the lower Oxygen Enhancement Ratio (OER) of neutrons confers an advantage. Also, neutrons have a higher relative ... and photodynamic therapy that permit focal therapy by utilizing image guidance. These therapies are still in beginning or ...
... image several samples overlay joined images to panoramic algorithmic reconstruction in-vivo image The CBCT scanner offers ... CBCT is superior to DSA for this therapy since the enhancement patterns on DSA can be difficult to discern due to the ... Systematic Radiographic Investigation, Diagnostics, Treatment Approach Verlag 2einhalb, ISBN 978-3-9815787-0-6. www.cbct-3d.com ... Axial image obtained from the first Cone-Beam 3D Scan performed on July 1, 1994 Axial image obtained from the first Cone-Beam ...
The radiographic image and a modem or other connection are required for this first step. The image is scanned and then sent via ... This endeavor has expanded as a teletherapy application for cognitive skills enhancement programs for school children. Tele- ... Teleradiology is the ability to send radiographic images (x-rays, CT, MR, PET/CT, SPECT/CT, MG, US...) from one location to ... At the dawn of the technology, videotelephony also included image phones which would exchange still images between units every ...
The primary focus of the application of image processing to radiography is the problem of segmentation. The general ... Radiographic Image Enhancement by Wiener Decorrelation. Brunswick, ME. The primary focus of the application of image processing ... The primary focus of the application of image processing to radiography is the problem of segmentation. The general ...
Lumbar Vertebrae / diagnostic imaging* * Lumbar Vertebrae / physiology * Models, Anatomic * Radiographic Image Enhancement / ... Objectives: To correlate and quantify measurements of the projected 2-D radiographic image with the degree of 3-D y-axis ... Background: Historically, measurement of 2-dimensional (2-D) radiographic images on the anteroposterior radiograph has been ... Correlation and quantification of projected 2-dimensional radiographic images with actual 3-dimensional Y-axis vertebral ...
Region-of-Interest Imaging. X-ray Fovea Imaging. Cardiovascular Diseases. Radiation Dosage. Radiographic Image Enhancement. ... Device: Region-of-Interest Imaging (X-ray Fovea Imaging) Use of an experimental fluoroscopy system fitted with a region-of- ... Quality and diagnostic benefit of images obtained without and with the region-of-interest imaging. [ Time Frame: Retrospective ... Thus, decreasing the image quality in periphery can provide an overall exposure reduction to patients and interventionists ...
In addition, potential pitfalls in pelvic imaging concerning femoroacetabular impingement are shown. ... Femoroacetabular impingement: radiographic diagnosis--what the radiologist should know AJR Am J Roentgenol. 2007 Jun;188(6): ... Objective: The purpose of this article is to show the important radiographic criteria that indicate the two types of ...
... and the images were considered acceptable. The sharpness of the opacity edges may to a great extent be affected by Enhancement ... CR and FPD DR chest radiographic image parameters for the pneumoconioses: the Japanese approach and experience. Narufumi ... Application of the ILO International Classification of Radiographs of Pneumoconioses to Digital Chest Radiographic Images. ... Those influences on the display of a chest image are universal when viewing either hard copy or soft copy images. DICOM Part 14 ...
The system includes the exchange of state parameters between the client computer of a user controlling the image rendering, the ... The server processes extensive image rendering task for which the remote clients are not equipped and transmits newly-processed ... One embodiment for educational applications utilizes pre-stored image data sets which eliminates the need to transmit large ... system is described in which users located remotely from an image data storage library may participate in a collaborative image ...
Radiographic image enhancement comparison and storage requirement reduction system. US5742700 *. Oct 13, 1995. Apr 21, 1998. ... Dolphin Imaging Systems. Method and apparatus for generating cephalometric images. US5382164 *. Jul 27, 1993. Jan 17, 1995. ... computer-aided tomographic images or data sets, or magnetic resonance images, among others. More details on the contact or non- ... 3-D images of various orthodontic views can then be rendered after the compressed data of the teeth has been received. In this ...
Radiographic image enhancement comparison and storage requirement reduction system. US5742700. Oct 13, 1995. Apr 21, 1998. ... Dolphin Imaging Systems. Method and apparatus for generating cephalometric images. US5328362. Mar 11, 1992. Jul 12, 1994. ... computer-aided tomographic images or data sets, or magnetic resonance images, among others. The teeth data may be generated by ... Surgical Treatment Planning and Imaging Processing," Symposium: Computerized Facial Imaging in Oral and Maxilofacial Surgery, ...
As such a hematoma ages, a ring blush may be seen following contrast-agent enhancement. Serial CT demonstrates disappearanc ... Radiographic Image Enhancement. Time Factors. Tomography, X-Ray Computed*. From MEDLINE®/PubMed®, a database of the U.S. ... As such a hematoma ages, a ring blush may be seen following contrast-agent enhancement. Serial CT demonstrates disappearance of ...
Radiographic Image Enhancement. Sensitivity and Specificity. Ultrasonography, Prenatal*. From MEDLINE®/PubMed®, a database of ...
Radiographic image enhancement comparison and storage requirement reduction system. US5742700 *. 13 Oct 1995. 21 Apr 1998. ... x-ray imaging, tomographic imaging, sonographic imaging, and other techniques for obtaining information about the position and ... Dolphin Imaging Systems. Method and apparatus for generating cephalometric images. US5328362 *. 11 Mar 1992. 12 Jul 1994. ... Dental Imaging Technologies Corporation. Intra-oral image acquisition alignment. US20160310235 *. 24 Apr 2015. 27 Oct 2016. ...
Radiographic image enhancement comparison and storage requirement reduction system. US5742700 *. 13 Oct 1995. 21 Apr 1998. ... computer-aided tomographic images or data sets, magnetic resonance images, etc. Methods for digitizing such conventional images ... Dolphin Imaging Systems. Method and apparatus for generating cephalometric images. US5328362 *. 11 Mar 1992. 12 Jul 1994. ... Dolphin Imaging Systems. Method for determining orthodontic bracket placement. US5017133 *. 1 May 1990. 21 May 1991. Gac ...
Radiographic image enhancement comparison and storage requirement reduction system. US5795152. 28 Mar 1997. 18 Ago 1998. Glatt ... computer-aided tomographic images or data sets, magnetic resonance images, etc. Methods for digitizing such conventional images ... Dolphin Imaging Systems. Method and apparatus for generating cephalometric images. US5338198. 22 Nov 1993. 16 Ago 1994. Dacim ... Dolphin Imaging Systems Inc.. A method of producing an orthodontic bracket. WO1991004713A1. 26 Sep 1990. 18 Abr 1991. Jourda ...
Radiographic image enhancement comparison and storage requirement reduction system. April, 1998. Echerer et al.. ... Verstreken et al., "An Image-Guided Planning System for Endosseous Oral Implants," IEEE Trans. Med. Imaging, 17(5):842-852 (Oct ... Surgical Treatment Planning and Imaging Processing," Symposium: Computerized Facial Imaging in Oral and Maxilofacial Surgery ... Imaging method for fabricating dental devices. October, 1998. Schmitt et al.. 5800174. Method using an articulator and computer ...
52 Depositions confirmed on both post-EVT CT and MR imaging have also co-localized to MR imaging contrast enhancement and ... Contrast media and the brain: the basis of CT and MR imaging enhancement. Neuroimaging Clin N Am 1998;8:695-707 pmid:9673320. ... The effect of radiographic contrast media on the morphology of human erythrocytes. Clin Hemorheol Microcirc 2008;38:1-11 pmid: ... 53 MR imaging contrast deposition during routine gadolinium-enhanced MR imaging following IV rtPA occurs in approximately 20% ...
Description: Gamma corrections, edge enhancement and negative image *Instrument Type: Other. *Technology: Radiographic / X-ray ... AN04: Imaging with Pulsed X-Ray Sources In many x-ray imaging applications the x-ray source is always turned on. This is often ... Description: 30 fps, gamma corrections, edge enhancement function and negative image *Instrument Type: Other ... and also happens to correspond to the default imaging mode of the RadEye image sensor and the Shad-o-Box cameras. In the ...
Angiomatosis; Splenic Diseases; Sclerosis; Radiographic Image Enhancement; Splenectomy Academic: 336-716-4316. Department: 336- ... Magnetic Resonance Imaging; Magnetic Resonance Imaging, Cine; Heart Diseases; Dobutamine; Ventricular Dysfunction, Left ...
Radiographic Image Enhancement Reproducibility of Results Sensitivity and Specificity Stents Vascular Calcification ... A New Contrast Enhancement Protocol for Subtraction Coronary Computed Tomography Requiring a Short Breath-Holding Time. ... A New Contrast Enhancement Protocol for Subtraction Coronary Computed Tomography Requiring a Short Breath-Holding Time. ... The purpose of this study was to evaluate whether use of this new protocol produced adequate quality images, taking into ...
Charge-coupled device camera optical density range enhancement and the effect on radiographic image segmentation. British ... Short communication: charge-coupled device camera optical density range enhancement and the effect on radiographic image ... Bone edge detection in hand radiographic images. In: Proceedings of the 16th Annual International Conference of the IEEE ... Mahmoodi S, Sharif BS, Chester EG, Owen JP, Lee R. Skeletal growth estimation using radiographie image processing and analysis ...
Radiographic Image Enhancement [E01.370.350.600.350.700]. *Radiography, Dual-Energy Scanned Projection [E01.370.350.600.350.700 ... A method of producing a high-quality scan by digitizing and subtracting the images produced by high- and low-energy x-rays. ... Wohlfahrt P, Richter C. Status and innovations in pre-treatment CT imaging for proton therapy. Br J Radiol. 2020 Mar; 93(1107): ... Dual-Energy CT of Pediatric Abdominal Oncology Imaging: Private Tour of New Applications of CT Technology. AJR Am J Roentgenol ...
T/F: A radiograph is simply a representation of the radiographic densities of anatomical structures ... Q: With ________ MRI, tissue enhancement is ______________ to blood flow to the tissue. ... Medical Imaging Flashcards Preview PTRS 746 Exam 1 Combined and Randomized , Medical Imaging , Flashcards ... Q: By what percent was diagnostic imaging reduced when military PTs were given the ability to order images. ...
Refractory symptoms prompted repeat imaging, revealing cyst enlargement and dense rim enhancement. Resection of the EC resolved ... Radiographic evidence suggested that this occurred secondary to cannulation of a segment of the external jugular vein with a ... Initial cyst size and appearance on MR imaging were not significant predictors of growth or change in imaging appearance at ... Based on imaging studies obtained in the present case, the authors posit that the mechanism for this unusual type of shunt ...
The digitized image is repeatedly convolved to form first convolved images, which first convolved images are convolved a second ... The second convolved image from a current stage and the first convolved image from a previous stage are used with a ... Each first convolved image and the respective second convolved image representing a stage, and each stage represents a ... neighborhood median determined from the second convolved image from the current stage by a peak detector to detect peaks, or ...
Synovial membrane enhancement and bone erosion by magnetic resonance imaging for prediction of radiologic progression in ... Bone edema scored on magnetic resonance imaging scans of the dominant carpus at presentation predicts radiographic joint damage ... Predictors of radiographic progression. The following potential baseline risk factors for radiographic progression were ... with respect to prevention of radiographic progression, (2) investigate whether the favourable clinical and radiographic ...
Uniform enhancement is seen with intravenous (IV) radiographic contrast. CT is almost as accurate as US in detecting an ... encoded search term (Cryptorchidism Imaging) and Cryptorchidism Imaging What to Read Next on Medscape. Related Conditions and ... An oval mass that appears as low signal on T1-weighted images and high signal on T2-weighted images is characteristic of an ... The diagnostic utility of combined diffusion-weighted imaging and conventional magnetic resonance imaging for detection and ...
Radiographic image enhancement comparison and storage requirement reduction system US5800174A (en) * 1994-02-18. 1998-09-01. ... Radiographic image enhancement comparison and storage requirement reduction system US5342202A (en) * 1992-07-06. 1994-08-30. ... Dolphin Imaging Systems. Method and apparatus for generating cephalometric images US5338198A (en) * 1993-11-22. 1994-08-16. ... Dolphin Imaging Systems. Method and apparatus for generating cephalometric images US5011405A (en) * 1989-01-24. 1991-04-30. ...
... an imaging device and a processing system incorporating a means for real time digital sampling of images of moving joints, ... Radiographic image enhancement comparison and storage requirement reduction system US5741255A (en) * 1996-06-05. 1998-04-21. ... G06T2207/00-Indexing scheme for image analysis or image enhancement * G06T2207/30-Subject of image; Context of image processing ... G06T2207/00-Indexing scheme for image analysis or image enhancement * G06T2207/30-Subject of image; Context of image processing ...
Computed tomography angiography Radiographic image enhancement Cerebral angiography Arteries Neck Abbreviations. CT. Computed ... Oh LCW, Lau KK, Devapalasundaram A, Buchan K, Ardley N, Huynh M (2014) Efficacy of fine focal spot imaging in CT abdominal ... Haidekker MA (2013) Medical imaging technology, 1st edn. Springer, New YorkCrossRefGoogle Scholar ... Schneider CA, Rasband WS, Eliceiri KW (2012) NIH image to ImageJ: 25 years of image analysis. Nat Methods 9:671-675. https:// ...
D-45 Assessment on Digital Imaging Enhancement for Radiographic Interpretation. B. Adenle, Creative Research Network Technology ... Imaging (Standley I). Organizer & Instructors:. S. Vogt, Argonne National Laboratory, USA, [email protected] F. DeCarlo, APS- ... Imaging (Meadowbrook). Chairs: K. Tsuji, Osaka City University, Japan, [email protected] F. Meirer, Utrecht ... 3D Imaging of Geological Materials using X-ray Diffraction and Spectroscopy M.K.A. Koker*, M. Newville, A. Lanzirotti, GSECARS ...
  • The primary focus of the application of image processing to radiography is the problem of segmentation. (iastate.edu)
  • Computed radiography, requiring an imaging plate, has been already approved for the purpose since 2001. (cdc.gov)
  • DANVERS, Mass.--( BUSINESS WIRE )--Samsung, an emerging leader in medical imaging technology, announces that the GC70 Digital Radiography (DR) system received FDA 510(k) clearance for the U.S. market, underscoring the company's commitment to expanding its suite of radiography products. (businesswire.com)
  • The Sireskop SD is a universal system designed to streamline fluoroscopy and radiography operations, as well as patient flow, during fluoroscopic and radiographic procedures. (diagnosticimaging.com)
  • Radiography using the oblique view shows articulation of the calcaneus, talus, navicular, and cuboid bones, and it can be helpful in patients with foot pain who have no obvious diagnosis.Although not routinely indicated, magnetic resonance imaging (MRI) can play a significant role in making a precise diagnosis, guiding treatment decisions, and determining response to therapy. (amazonaws.com)
  • Nodule detection in digital chest radiography: part of image background acting as pure noise. (gu.se)
  • Images of a phantom obtained with computed radiography and standard screen-film imaging were compared to evaluate observer threshold perception performance with a modified contrast-detail technique. (duke.edu)
  • The images were subtracted by the Regeemy® program, and receiver operating characteristic analysis was used to evaluate the diagnostic performance for each imaging system, and the diagnostic accuracy of both diagnosis methods for detecting lesions was conducted by the assessment of the pairs of radiography (digital and subtracted) by two radiologists. (bvsalud.org)
  • and the radiography taken of the apical and lingual resorption, with the smaller vertical and horizontal angles variation ensured a better assessment of the image, mainly on the shallower cavity size. (bvsalud.org)
  • A New Contrast Enhancement Protocol for Subtraction Coronary Computed Tomography Requiring a Short Breath-Holding Time. (nextbio.com)
  • Gill MK, Vijayananthan A, Kumar G, Jayarani K, Ng K-H, Sun Z (2015) Use of 100 kV versus 120 kV in computed tomography pulmonary angiography in the detection of pulmonary embolism: effect on radiation dose and image quality. (springer.com)
  • High-Resolution Computed Tomography Imaging in Conductive Hearing Loss: What to Look for? (semanticscholar.org)
  • Quantization of Liver Tissue in Dual kVp Computed Tomography using Linear Discriminant Analysis", Medical Imaging 2009: Physics of Medical Imaging, edited by Ehsan Samei, Jiang Hsieh, Proc. (freepatentsonline.com)
  • Quantization of Liver Tissue in Fast-Switched Dual kVp Computed Tomography using Linear Discriminant Analysis", SPIE Medical Imaging Conference, Lake Buena Vista, FL, Feb. 8-12, 2009. (freepatentsonline.com)
  • [email protected]#Based on 3D tomography and DBT imaging scanning, we analyzed the methods for projection data correction, geometric correction, projection enhancement, filter modulation, and image reconstruction, and established a hardware testing platform. (bvsalud.org)
  • [email protected]#This DBT imaging system can be used for mammary tomography with an image quality comparable to that of commercial DBT systems to facilitate imaging diagnosis of breast diseases. (bvsalud.org)
  • Modern CT, MR and positron emission tomography scanners have seen significant improvements in the rapidity of image acquisition and spatial resolution. (bvsalud.org)
  • She had clinical and radiographic response to treatment until 7 months following diagnosis, when her hemiparesis returned and she developed vision loss. (upmc.edu)
  • Thus, decreasing the image quality in periphery can provide an overall exposure reduction to patients and interventionists without impacting on diagnosis. (clinicaltrials.gov)
  • Radiological imaging plays a vital role in the diagnosis of EVF and is indispensable to gastroenterologists and surgeons for choosing the correct therapeutic option. (hindawi.com)
  • The processor supports several high-resolution monitors which can respectively display radiographic images from different subjects, so that review and diagnosis can occur remotely. (google.ca)
  • As surgical biopsy can have significant morbidity in this area, usually the diagnosis is made on imaging findings alone. (radiopaedia.org)
  • SmartStitching provides convenient diagnosis when viewing a stitched image of a whole spine or long bone. (businesswire.com)
  • 8 A physical exam, colonoscopy and imaging studies can be helpful in narrowing the differential diagnosis. (appliedradiology.com)
  • The American Association for the Study of Liver Diseases thus recommends hepatic imaging every six months among patients at risk for HCC (9) (Table I). The diagnosis of HCC is typically made on the basis of imaging findings. (rarediseases.org)
  • The recognition of imaging patterns, size, location, and relationship to neighboring structures significantly narrows the differential diagnosis and helps to guide clinical management in a multidisciplinary approach (Table 1). (appliedradiology.com)
  • Tumors of the sellar region can be difficult to differentiate radiographically, however, imaging may narrow the differential diagnosis based on enhancement patterns and the lesion's relationship to the surrounding structures. (oncologynurseadvisor.com)
  • Familiarity with the imaging features of sickle cell disease is important for the diagnosis and management of complications. (nih.gov)
  • Clinical signs are often nonspecific, and imaging findings can be misleading, often resulting in a delay in diagnosis and proper treatment. (thefreelibrary.com)
  • Areas covered: This review evaluates the current literature on the various imaging techniques used in VOD/SOS diagnosis in several clinical scenarios. (bvsalud.org)
  • Images containing a large portion of scatter radiation may result in an incorrect diagnosis. (bvsalud.org)
  • Compared to film, silicon-based imaging technologies exhibit enhanced sensitivity, dynamic range and linearity. (surrey.ac.uk)
  • Aside from a classic dissection approach to human structure, a variety of educational enhancements including radiographic imaging studies, cross-sectional specimens and video animations are employed to optimize 3-D relationships. (unc.edu)
  • She underwent staging cross sectional imaging that revealed an incidentally diagnosed 16 cm calcified cystic mass (Bosniak IV) arising from the anterior aspect of an atrophic right kidney abutting the right colon and no evidence of metastatic disease. (renalandurologynews.com)
  • Since the introduction of the Bosniak classification system, renal cystic masses are characterized as Bosiak I to IV based on radiographic features of possible malignancy (septa presence and thickness, calcifications, enhancement, solid components, and size) identified on cross sectional imaging (CT, MRI). (renalandurologynews.com)
  • Preprocedural cross-sectional imaging (PCSI) for peripheral artery disease (PAD) may vary due to patient complexity, anatomical disease burden, and physician preference. (bvsalud.org)
  • Extrapineal abnormalities of the tectal region: MR imaging findings. (radiopaedia.org)
  • 4. DinçEr A, Yener U, ÖZek MM. Hydrocephalus in patients with neurofibromatosis type 1: MR imaging findings and the outcome of endoscopic third ventriculostomy. (radiopaedia.org)
  • Central nervous system lymphoma: characteristic findings on traditional and advanced imaging. (radiopaedia.org)
  • Every Tuesday there is an interdisciplinary conference that includes the division of neurology, neurosurgery, and radiology held to review imaging and case findings, as well as establish a clinical plan for patients with challenging cerebrovascular disorders. (umassmed.edu)
  • Careful analysis of imaging findings and correlating them with the patient's history and physical examination, as well as considering the anatomic location of the injury, can help physicians prescribe the appropriate treatment. (amazonaws.com)
  • MR imaging depicted these following findings that usually were not shown on conventional radiographs or 3D-CT scans: cord deformity, soft tissue disruption, and ligament tears in the posterior column. (ajnr.org)
  • however, nonspecific clinical presentations and overlapping imaging findings often create a dilemma in clinical management. (appliedradiology.com)
  • We briefly review pertinent characteristics of each lesion, illustrate magnetic resonance (MR) imaging findings, and correlate with histological findings. (appliedradiology.com)
  • At MR imaging, findings of cortical defects, adjacent fluid collections in soft tissue, and bone marrow enhancement are suggestive of infection. (nih.gov)
  • Conventional methods to reduce in radiation exposure, however, impact and often degrade diagnostic image quality. (clinicaltrials.gov)
  • and 5,139,419, assigned to Ormco Corporation, describe methods for manipulating digital images of teeth for designing orthodontic appliances. (google.com.au)
  • The growth of this critical field is slowed by problems in traditional image analysis methods. (spie.org)
  • Traditional methods lack the speed, generality, and robustness that many modern image analysis problems require. (spie.org)
  • MR imaging shows abnormalities in AS that may not be clear or even detectable by using other imaging methods. (ajnr.org)
  • A cascaded linear systems approach wherein several parameter values were estimated using Monte Carlo methods was used to model the image formation process of a single-side read flying spot CR system using a granular phosphor. (umassmed.edu)
  • Those who already made use of image analysis in their practice will find useful hints on how to improve and better utilize their methods. (chemtec.org)
  • The book contains references to various applications already in use, methods of image capture, data processing, hardware and software required. (chemtec.org)
  • Two such methods are presented: Scanning Confocal Microscopy (SCM), and Magnetic Resonance Imaging (MRI). (asme.org)
  • However, increasing evidence suggests the emerging role of several imaging methods that could help the clinician in VOD/SOS assessment. (bvsalud.org)
  • The results showed that a beam-stop array and the SFC program can be used to accurately measure scatter fractions in radiographic images and can be applied for both developing scatter correction methods as well as systems. (bvsalud.org)
  • 6 On MR these are well-circumscribed, thin-walled, hypointense lesions on T1-weighted images and a homogeneous, hyperintense lesion on T2-weighted images. (appliedradiology.com)
  • With the capability to show lesions in the posterior column, MR imaging can serve to evaluate AS patients with spinal fracture for the possibility of 3-column involvement. (ajnr.org)
  • Imaging showed hyperintense lesions involving the right temporoparietal region and systemic workup was unrevealing. (neurology.org)
  • Characteristics of new brain lesions in patients with cancer that should raise suspicion of diagnoses other than brain metastasis include (1) primary malignancy without regional or distant metastasis, (2) imaging without discrete mass-like enhancement, and (3) cortically based location of lesions not at the gray-white matter junction. (neurology.org)
  • The patient data study showed a high contrast between tissues, and the lesions were more clearly displayed in the reconstructed image. (bvsalud.org)
  • 1 In 1993, the IIF category was introduced to identify lesions with features that warranted short term (3-6 month) imaging surveillance. (renalandurologynews.com)
  • Although not neoplastic, the lesions can be locally aggressive and may mimic malignancy clinically, at cystoscopy, and at imaging. (radiopaedia.org)
  • Typical CT finding is homogeneous expansion of tectal plate, isodense to grey matter with minimal enhancement on postcontrast images 1,3 . (radiopaedia.org)
  • 8 A subungual location in conjunction with homogeneous high signal intensity on T2WI, low or intermediate signal on T1WI, and uniform enhancement after contrast administration are characteristic (Figure 2). (appliedradiology.com)
  • Inflammation of the hypophysis may be secondary to an autoimmune process or tissue invasion from other inflammatory conditions, resulting in pituitary dysfunction and homogeneous enhancement on radiographic imaging. (oncologynurseadvisor.com)
  • Magnetic resonance imaging demonstrated significant pericystic brainstem edema and mass effect with effacement of the fourth ventricle. (thejns.org)
  • Quantitative assessment of synovial inflammation by dynamic gadolinium-enhanced magnetic resonance imaging. (semanticscholar.org)
  • Magnetic resonance imaging showed a 5.6 x 4.3 x 4.5 cm T1 hypointense, T2/FLAIR hyperintense mass containing several scattered foci of contrast enhancement centered within the right basal ganglia and medial temporal lobe (Fig. 1A ). (upmc.edu)
  • With sinus involvement, magnetic resonance imaging (MRI) may demonstrate variable T1 and T2 intensity with focal lack of enhancement in areas of devitalized sinus mucosa ( Fig. 1 ). (aao.org)
  • In that context, magnetic resonance (MR) imaging may be useful. (nih.gov)
  • Pilocytic astrocytomas (PA) have deceiving histologic and radiographic features that resemble more aggressive tumors (e.g., mitotic figures, endothelial proliferation, necrosis, and contrast-enhancement on magnetic resonance imaging [MRI] scans), although lack of perilesional edema often distinguishes them from higher grade tumors. (neurologyadvisor.com)
  • A multiple video data bus architecture permits high speed data transfer among the various circuit elements of a fluoroscopic imaging processor. (google.ca)
  • In 12 patients, postoperative CT revealed contrast enhancement at the resection margin, indicating residual tumor. (uni-regensburg.de)
  • The presence of restricted diffusion and heterogenous enhancement on imaging suggested a highly cellular tumor. (upmc.edu)
  • however, the most reliable variable for ChRCC versus renal oncocytoma differentiation was the tumor:cortex peak early-phase enhancement ratio (PEER) using multiphase CT. (aacrjournals.org)
  • Oh LCW, Lau KK, Devapalasundaram A, Buchan K, Ardley N, Huynh M (2014) Efficacy of 'fine' focal spot imaging in CT abdominal angiography. (springer.com)
  • An image data manipulation system is described in which users located remotely from an image data storage library may participate in a collaborative image data rendering and evaluation session. (google.co.uk)
  • Use of an ultra-low CM volume protocol at 70 kV is feasible in the evaluation of PAD, resulting in good to excellent image quality with mean ED of 1.1 ± 0.5 mSv. (springer.com)
  • In order to obtain comparable images, pre-storage processing considerably affects image, and storage using P-values as stated in DICOM part 14 is strongly recommended. (cdc.gov)
  • Scatter radiation considerably affects radiographic image quality by reducing image contrast and contributing to a non-uniform background. (bvsalud.org)
  • An oval mass that appears as low signal on T1-weighted images and high signal on T2-weighted images is characteristic of an undescended testis. (medscape.com)
  • A receiver operating characteristic (ROC) study with five observers was conducted on two different sets of images, clinical chest X-ray images and images with a similar power spectrum as the clinical images but with a random phase spectrum, resulting in an image background containing pure noise. (gu.se)
  • these conditions have characteristic radiographic appearances. (nih.gov)
  • The other type of digital radiographic techniques, the CR that needs the storage phosphor, i.e. the imaging plate (IP), has been approved since 2001 (6). (cdc.gov)
  • 1996) Am. J. Orthodontics 110:365-369 describes a method for laser scanning a plaster dental cast to produce a digital image of the cast. (google.com.au)
  • identifying one or more peaks in the digital image based at least upon the second convolved image from the current stage, the first convolved image from the previous stage, and the neighborhood medians for the current stage. (google.ca)
  • 6. The method of claim 1 , wherein the digital image is a scaled image. (google.ca)
  • In the time interval between the publication of D2 in 1986 and the priority date of the patent in 1991, many thousands of researchers were working on the problem of improving the quality of digital imaging. (epo.org)
  • 2. High resolution digital image storage and processing arrangement according to claim 1, wherein said plurality of data buses includes five BTL data buses, and each of said A/D circuit means, said display circuit means, said image processor circuit means, and said memory interface circuit means includes five BTL bus interface circuits connected to respective data ports of said BTL data buses. (google.ca)
  • Today we are totally digital and each of our modalities is connected through a radiology information system (RIS) and our images are available for viewing anytime, anywhere through a web-based PACS. (healthimaging.com)
  • The GC70 creates high-quality images with cutting-edge digital enhancements such as the S-Vue imaging engine, which provides high resolution images through adaptive filtering. (businesswire.com)
  • Siemens Medical Solutions has introduced at the RSNA meeting a digital enhancement and mobile flat-panel detector for its Axiom Sireskop SD. (diagnosticimaging.com)
  • Digital autoradiography using room temperature CCD and CMOS imaging technology. (surrey.ac.uk)
  • We also compare these digital image sensor technologies with the use of conventional film. (surrey.ac.uk)
  • We consider geodesic distance transformations for digital images. (spie.org)
  • Given a M × N digital image, a distance image is produced by evaluating local pixel distances. (spie.org)
  • Journal of Digital Imaging. (elsevier.com)
  • The advent of high speed digital cameras working with image processing software is changing this situation. (chemtec.org)
  • [email protected]#To develop a digital breast tomosynthesis (DBT) imaging system with optimizes imaging chain. (bvsalud.org)
  • The aim of this study is to propose a method that automatically select the trabecular bone area in digital periapical radiographic images using a sequence of morphological operations. (bvsalud.org)
  • The study involved 50 digital periapical radiographic images of women aged from 36 to 58 years old. (bvsalud.org)
  • The method , which consists of only simple morphological operations on digital periapical radiographic images, can be considered for selecting the trabecular bone area automatically. (bvsalud.org)
  • determinar las alteraciones ecográficas del músculo extensor digital lateral (EDL), tendón y vaina sinovial en CCC con signos clínicos de hiperflexión del corvejón. (scielo.org.co)
  • The purpose of this study is to comprehensively compare and evaluate the characteristics of image quality for digital mammography systems which use a direct and indirect conversion detector. (bvsalud.org)
  • The direct conversion detector which has higher DQE value all over spatial frequency would provide the potential benefits for both improved image quality and lower patient dose in digital mammography system. (bvsalud.org)
  • Then, each bone chip and the aluminum step-wedge were placed on periapical radiographs in order to take the images with Ekta Speed film, with an exposure time of 0.2 seconds and focal length of 25 cm. (bvsalud.org)
  • Tectal tumors of childhood: clinical and imaging follow-up. (radiopaedia.org)
  • The medical charts and radiographic studies of 55 patients with these tumors were reviewed. (semanticscholar.org)
  • Imaging predictors of patients who will need further treatment include a size greater than 2.5 cm and presence of contrast enhancement 3 . (radiopaedia.org)
  • MRI-bone marrow oedema, TSS and anti-CCP predicted radiographic progression at 5 years. (bmj.com)
  • The Bristol 'OA500' study: progression of osteoarthritis (OA) over 3 years and the relationship between clinical and radiographic changes at the knee joint. (semanticscholar.org)
  • As a measure of the part of the image background that acts as pure noise, the ratio between the contrast needed to obtain an area under the ROC curve of 0.80 in the clinical images to that in the random-phase images was used. (gu.se)
  • Optimum exposure necessary for performance with the imaging plate technique to match that with screen-film techniques was determined, as was comparative performance with variation in kilovoltages, plate type, spatial enhancement, and hard-copy interpolation method. (duke.edu)
  • Little change in observer performance was found with variation in plate type, spatial enhancement, or method of hard-copy interpolation. (duke.edu)
  • MR imaging of the spine had been done by using a 1.5-T unit, including the following pulse sequences: sagittal T1-weighted, fast spin-echo T2-weighted, axial T1-weighted, and axial T2-weighted images. (ajnr.org)
  • Perisinakis K, Papadakis AE, Damilakis J (2009) The effect of x-ray beam quality and geometry on radiation utilization efficiency in multidetector CT imaging. (springer.com)
  • 3D-CT had been performed by using a multidetector-row CT unit based on 0.6-1-mm axial images. (ajnr.org)
  • 2 MR characteristics that help establish benignity include a well-circumscribed lesion with hyperintense signal on T1-weighted images (T1WI), hyperintense signal on T2-weighted images (T2WI), homogenous signal loss on fat-suppressed sequences, low signal on short-tau inversion recovery (STIR) or frequency selective fat suppressed images, and limited fine peripheral capsular enhancement. (appliedradiology.com)
  • Due to recent pelvic surgery, the imaging characteristics of the mass, and the normal appearance of both ovaries, a gossypiboma was considered. (appliedradiology.com)
  • Glomus tympanicum chemodectomas: radiographic and clinical characteristics. (semanticscholar.org)
  • article{Larson1987GlomusTC, title={Glomus tympanicum chemodectomas: radiographic and clinical characteristics. (semanticscholar.org)
  • We installed two Siemens AXIOM Aristos FX systems at one of our imaging centers in January 2004 and plan to install another of these systems at a new imaging center in October of this year. (healthimaging.com)
  • It is hypothesized that systematic application of x-ray attenuation will significantly reduce the radiation exposure of the interventional procedure while maintaining image quality, thereby decreasing risk to the patient. (clinicaltrials.gov)
  • X-ray exposure area product, primary and scatter radiation to patient and interventionist and procedure and irradiation time for interventions performed without and with region-of-interest imaging (control and experimental arms, respectively). (clinicaltrials.gov)
  • SimGrid increases image quality by enhancing contrast while reducing the visual effects of scatter radiation with one click. (businesswire.com)
  • It meets the performance standards common to other Axiom products, such as enhanced workflow and efficiency, optimal image quality, reduced radiation dose, and patient comfort. (diagnosticimaging.com)
  • In the past few years, many efforts have been made to reduce the effects of scatter radiation on radiographic images. (bvsalud.org)
  • A cryptorchid testis, shown in the image below, is 20-48 times more likely to undergo malignant degeneration than a normal testis. (medscape.com)
  • Focal irregular wall thickening with intermediate signal intensity on both T1- and T2-weighted images and with enhancement after contrast material injection is suggestive of malignant degeneration. (appliedradiology.com)
  • Because images from CR are somewhat dissimilar from FS radiographs, the MHWL-J had selected a number of typical case sets to supplement the Japan Pneumoconiosis Standard Radiographs. (cdc.gov)
  • After we had decided the appropriate imaging parameters, we performed a reading trial comparing FS radiographs and hard copies of FPD DR images. (cdc.gov)
  • 19-21 The ability to assess skeletal maturity by the developmental stage of the dentition through the examination of a panoramic radiograph (orthopantomograph) and relating them with CVMI from lateral cephalograms (both of which are routine diagnostic radiographs for orthodontic treatment) offers several advantages over the conventional hand-wrist radiographic method. (ispub.com)
  • The sensitivities of 3D-CT scans for demonstration of the following problems were similar to that of MR imaging and were better than that of conventional radiographs: tearing of the posterior longitudinal ligament, the thoracic spinous process fracture, and the facet fracture. (ajnr.org)
  • MR imaging also showed avascular necrosis and occult fractures better than conventional radiographs or CT scans. (ajnr.org)
  • Cardiac, respiratory as well as bulk patient motion have detrimental effects on thoracic PET imaging, in particular on cardiovascular PET imaging where the motion can affect the PET images quantitatively as well as qualitatively. (bvsalud.org)
  • A series of morphological operations-top-hat and bottom-hat filtering, automatic thresholding, closing, labeling, global thresholding, and image subtraction-are performed to automatically obtain the trabecular bone area in images. (bvsalud.org)
  • Conventional imaging modalities focus on the morphological features of atherosclerotic disease such as the degree of stenosis caused by a lesion. (bvsalud.org)
  • Subjects undergoing routine cardiac catheterization or interventional procedures using the region-of-interest fluoroscopy (x-ray fovea imaging) system. (clinicaltrials.gov)
  • Zopfs D, Laukamp KR, Pinto Dos Santos D, Sokolowski M, Große Hokamp N, Maintz D, Borggrefe J, Persigehl T, Lennartz S. Low-keV virtual monoenergetic imaging reconstructions of excretory phase spectral dual-energy CT in patients with urothelial carcinoma: A feasibility study. (harvard.edu)
  • In eight patients, postoperative CT displayed no contrast enhancement along the border of resection. (uni-regensburg.de)
  • The system produces images in four seconds for quick review which is much easier on patients, especially the elderly or those in a great deal of pain because follow-up images can be done right then without coming back and re-lifting the patient to get them repositioned for that exposure. (healthimaging.com)
  • In the context of an imaging center, prior to DR they were doing 400 patients a month. (healthimaging.com)
  • After a year of using the Aristos FX, they were imaging 1,000 patients a month with the same number of technologists and no one has even asked for more staff. (healthimaging.com)
  • Workflow enhancements such as S-Align, a unique and highly practical feature, provides accurate alignment at multiple angles and broadcasts the detector's degree of angulation to the tube head allowing proper radiographic alignment when imaging gurney or wheel chair patients. (businesswire.com)
  • All patients at the Northern Ireland Cancer Centre are now imaged using one reset frame and three frame averages in the 6 MV 100 MU min(-1) low-dose acquisition mode. (qub.ac.uk)
  • Twelve successive cases of spinal fractures were identified in MR imaging files of AS patients. (ajnr.org)
  • Twelve consecutive AS patients with spinal fracture were identified from our records of MR images on the basis of their histories and imaging evidence obtained from May 2001 to November 2003. (ajnr.org)
  • We reviewed patients' clinical information and radiographic studies. (ajnr.org)
  • Patients from 2003 to 2012 comprised a retrospective cohort to identify clinical/radiographic variables associated with renal oncocytoma versus ChRCC. (aacrjournals.org)
  • Both patients showed complete resolution of symptoms shortly after treatment and improvement on imaging. (neurology.org)
  • Fourteen human lower incisors, submitted to simulated apical and lingual resorption cavities of different sizes, imaged with different angle projection variations were included in this study. (bvsalud.org)
  • Time Frame: Retrospective expert comparison of images from patient procedures (between control and experimental arms) will occur within 1 to 3 months after the completion of the pilot study and the full study. (clinicaltrials.gov)
  • Imaging features of gossypiboma: report of two cases. (jpgmonline.com)
  • Prasad S, Krishnan A, Limdi J, Patankar T. Imaging features of gossypiboma: report of two cases. (jpgmonline.com)
  • Imaging features of leptomeningeal secondary CNS lymphoma include leptomeningeal, dural, subependymal and cranial nerve enhancement. (radiopaedia.org)
  • The clinical and radiographic features of acute osteomyelitis may be particularly difficult to distinguish from those of bone infarction. (nih.gov)
  • 10 Histologically, schwannomas stain positive for S100 (marker for neuroectodermal cells), and present with an areas of spindle cells and nuclear palisading (Antoni A) next to hypocellular, myxoid regions (Antoni B). 10, 11 On MRI, schwannomas show intermediate to low signal on T1-weighted images and increased diffuse signal on T2WI. (appliedradiology.com)
  • The pre-storage parameters for gray scale processing and spatial frequency processing are critical to the visualization of the image, more than the post-storage parameters, like window level and width. (cdc.gov)
  • 2. The system of claim 1 wherein at least one of the receiving stations transmits a request for processed image data through the telecommunications network and wherein the image processing server transmits processed image data to the receiving station through the telecommunications network in response to the request. (google.co.uk)
  • 3. The system of claim 1 wherein the image processing server transmits processed imaged data to at least one receiving station upon the completion of the processing of image data. (google.co.uk)
  • Recently, by using the processing power of modern CPUs, we have found a software solution to the problem - a post-processing De-Convolution Technique for the detection, definition, and enhancement of image edge profiles. (ndt.net)
  • This book is about the design and processing of various materials rather than algorithms and design of image analysis equipment. (chemtec.org)
  • Although cyst rupture is a recognized complication, the radiographic evolution of an EC following rupture and the resultant parenchymal brainstem edema have not been reported. (thejns.org)
  • Quality and diagnostic benefit of images obtained without and with the region-of-interest imaging. (clinicaltrials.gov)
  • A method of producing a high-quality scan by digitizing and subtracting the images produced by high- and low-energy x-rays. (harvard.edu)
  • contrast-to-noise ratio-CNR) and subjective image quality (four-point Likert score) were assessed at different anatomical regions from the aorta down to the forefoot. (springer.com)
  • The tableside-controlled system includes comprehensive dose reduction and high-capacity x-ray tubes to provide flexibility for various patient types without sacrificing image quality. (diagnosticimaging.com)
  • This study was carried out to investigate whether the electronic portal imaging (EPI) acquisition process could be optimized, and as a result tolerance and action levels be set for the PIPSPro QC-3V phantom image quality assessment. (qub.ac.uk)
  • The aim of the optimization process was to reduce the dose delivered to the patient while maintaining a clinically acceptable image quality. (qub.ac.uk)
  • A series of phantoms were used to assess image quality for different acquisition settings relative to the baseline values obtained following acceptance testing. (qub.ac.uk)
  • The optimal settings for the low-dose acquisition mode with respect to image quality and dose were found to be one reset frame and three frame averages. (qub.ac.uk)
  • The dose at dmax from electronic portal imaging has been reduced by approximately 28%, and while the image quality has been reduced, the images produced are still clinically acceptable. (qub.ac.uk)
  • To achieve high image quality, we employ a human visual system (HVS)-based error metric between the continuous-tone image and a data-embedded halftone, and integrate a modified direct binary search (DBS) framework into the proposed message-embedded halftoning method. (spie.org)
  • Objective image quality metrics such as modulation transfer function and detective quantum efficiency were determined using this model and show good agreement with published empirical data. (umassmed.edu)
  • A model such as that addressed in this work could allow for improved understanding of the effect of storage phosphor physical properties and CR reader parameters on objective image quality metrics for existing and evolving CR systems. (umassmed.edu)
  • Bone Suppression Imaging (BSI) improves the clarity of lung tissue by suppressing the appearance of the ribs and mediastinum in chest images, improving the ability to detect nodules. (businesswire.com)
  • The aim of this study was to determine to what extent the image background acts as pure noise for the detection of subtle lung nodules in five different regions of the chest. (gu.se)
  • 3. The method of claim 2 , wherein the creating the plurality of surgery masks based at least in part on one of the plurality of second convolved images from the previous stage is performed at least in part by comparing, for each pixel of respective ones of the plurality of second convolved images, a pixel relative contrast to a threshold. (google.ca)
  • 4. The method of claim 3 , wherein the pixel relative contrast is determined at least in part by dividing a pixel value of the respective second convolved images of the current stage by a neighborhood median of a same pixel location of a previous stage. (google.ca)
  • Claim 1 of the second auxiliary request adds to claim 1 of the granted claim that the conversion function depends on the value of a pixel in the original image. (epo.org)
  • Haidekker MA (2013) Medical imaging technology, 1st edn. (springer.com)
  • Monochromatic CT Image Representation via Fast Switching Dual kVp," Medical Imaging 2009: Physics of Medical Imaging, edited by Ehsan Samei, Jiang Hsieh, Proc. (freepatentsonline.com)
  • Fast kVp Switching CT Imaging of a Dynamic Cardiac Phantom", Medical Imaging 2009: Physics of Medical Imaging, edited by Ehsan Samei, Jiang Hsieh, Proc. (freepatentsonline.com)
  • Refractory symptoms prompted repeat imaging, revealing cyst enlargement and dense rim enhancement. (thejns.org)
  • An analysis of a digitized image is provided. (google.ca)
  • Schneider CA, Rasband WS, Eliceiri KW (2012) NIH image to ImageJ: 25 years of image analysis. (springer.com)
  • Autonomous analysis of complex image data is a critical technology in today's world of expanding automation. (spie.org)
  • In this paper, we propose an optimization framework for geodesic distance transformations in a pattern recognition scheme, yielding more accurate machine learning based image analysis, exemplifying initial experiments using complex breast cancer images. (spie.org)
  • The potential applications of image analysis allow to follow these interrelations to optimize a product which is why research and production are eager to apply this emerging technology. (chemtec.org)
  • In the largest clinical comparison of renal oncocytoma versus ChRCC to our knowledge, we identified and prospectively validated a reproducible radiographic measure that differentiates CD117(+) renal oncocytoma from ChRCC with potentially 100% accuracy. (aacrjournals.org)
  • 2017 AUA renal mass and localized renal cancer guidelines: imaging implications. (renalandurologynews.com)
  • Ultrasonography is the most frequently used imaging study for the testicle. (medscape.com)
  • Parenchymal secondary CNS lymphoma appears quite similar to primary CNS lymphoma, however, it can be accompanied by leptomeningeal and subependymal enhancement. (radiopaedia.org)
  • Moreover, imaging of the PAD has its additional specific technical challenges such as the extended scan range and the presence of vascular pathologies or abnormalities, which often lead to contrast timing issues. (springer.com)
  • The pulse sequences used are T1, T2, and postgadolinium T1-weighted images in the axial and coronal planes. (medscape.com)
  • These neuromas occur more often in women and typically involve the three-four (or less commonly, the two-three) inter-metatarsal space.10 They are best detected on MRI using T1-weighted inversion recovery or T1-weighted, fatsuppressed images with gadolinium enhancement and T2-weighted images in the coronal plane. (amazonaws.com)
  • Based on imaging studies obtained in the present case, the authors posit that the mechanism for this unusual type of shunt migration is inadvertent penetration of either the internal or external jugular vein during the initial tunneling procedure. (thejns.org)
  • Our goal was to characterize spinal fractures in AS, and determine the value of various types of imaging studies. (ajnr.org)
  • Representative MR imaging studies were performed on either a 3.0-T Siemens scanner (Siemens Corp., Washington, DC) or a 1.5-T Siemens scanner (Siemens Corp., Washington, DC). (appliedradiology.com)
  • How to improve the accuracy of 4D-CBCT reconstruction image is a hot topic in current studies. (bvsalud.org)
  • Spatial saturation had been applied anteriorly and posteriorly on T2-weighted images to remove artifacts from heart, great vessel and posterior fat signals. (ajnr.org)