• In this study, we investigated the interplay of user-selected parameters on radiation dose and image quality in phantoms and cadavers, comparing traditional filtered back projection (FBP) with iterative reconstruction algorithms. (ucc.ie)
  • Advanced reconstruction schemes such as MBIR ( GE Healthcare ) do better at maintaining image quality at ultralow doses than earlier algorithms such as adaptive statistical iterative reconstruction (ASIR, GE), according to Michigan researchers. (auntminnie.com)
  • Algorithms that use iterative reconstruction to eliminate noise in images will have a "profound effect" on CT, according to Stanford radiology professor Dr. Geoffrey Rubin. (diagnosticimaging.com)
  • By using photons more efficiently, iterative reconstruction (IR) algorithms will serve as enabling technologies for advances in image quality and patient safety, allowing radiologists to dial back the kilovoltage (kV) that drives x-ray tubes and the mAs (milliamperes) that define tube current. (diagnosticimaging.com)
  • The algorithms offer powerful tools for maximizing spatial resolution while reducing noise and radiation dose usage. (medical.canon)
  • CT Noise-Reduction Methods for Lower-Dose Scanning: Strengths and Weaknesses of Iterative Reconstruction Algorithms and New Techniques. (academic-accelerator.com)
  • The multiple X-ray measurements taken from different angles are then processed on a computer using tomographic reconstruction algorithms to produce tomographic (cross-sectional) images (virtual "slices") of a body. (wikipedia.org)
  • The aim of this study is to provide a common framework for systematically evaluating algorithms for 4D-CBCT reconstruction from a 1-min scan. (wustl.edu)
  • Participants were blinded from the ground truth, and were given 3 months to apply their reconstruction algorithms to the projection data. (wustl.edu)
  • Conclusion: The SPARE Challenge represents the first framework for systematically evaluating state-of-the-art algorithms for 4D-CBCT reconstruction from a 1-min scan. (wustl.edu)
  • The challenge dataset and analysis framework are publicly available for benchmarking future reconstruction algorithms. (wustl.edu)
  • For scanner/protocol combinations that allow for the use of automated exposure control and/or iterative reconstruction algorithms while maintaining diagnostic image quality, those techniques can be employed when appropriate. (tranow.com)
  • Evaluation of iterative algorithms for metal artifact reduction in CT (Figure 3). (lu.se)
  • 2. Six iterative reconstruction algorithms in brain CT: a phantom study on image quality at different radiation dose levels. (lu.se)
  • Accurate simulation of X-ray transforms of representative objects plays an important role in the evaluation and improvement of CT reconstruction algorithms. (iospress.com)
  • Iterative reconstruction algorithms are well-known to produce high quality images. (iospress.com)
  • Because it is convenient to access the CT images directly from the picture archive and communication system (PACS), image domain-based denoising algorithms are becoming increasingly popular. (atlantis-press.com)
  • Comparison of the random survival forest based on machine learning algorithms to Cox regression: analyses based on SEER database. (cdc.gov)
  • Assessment of Filtered Back Projection, Adaptive Statistical, and Model-Based Iterative Reconstruction for Reduced Dose Abdominal Computed Tomography. (cuanschutz.edu)
  • Comparison between the conventional analytical reconstruction method filtered back-projection (FBP) and the iterative reconstruction (IR) method. (lu.se)
  • With the inclusion of Adaptive Iterative Dose Reduction 3D (AIDR 3D) in the scan protocol, the exposure dose is automatically reduced by up to by up to 75% relative to a scan reconstructed with filtered back projection. (medical.canon)
  • Assessment of sub-milli-sievert abdominal computed tomography with iterative reconstruction techniques of different vendors. (cuanschutz.edu)
  • Ultralow-Dose Abdominal Computed Tomography: Comparison of 2 Iterative Reconstruction Techniques in a Prospective Clinical Study. (cuanschutz.edu)
  • Role of compressive sensing technique in dose reduction for chest computed tomography: a prospective blinded clinical study. (cuanschutz.edu)
  • The purpose of this study is to investigate the feasibility of double low-dose (low radiation and low contrast medium doses) computed tomography pulmonary angiography (CTPA) in the diagnosis of pulmonary embolism. (edu.au)
  • A variational Bayesian blind restoration reconstruction based on shear wave transform for low-dose medical computed tomography (CT) image is proposed. (springeropen.com)
  • Low-dose computed tomography (LDCT) is clinically desirable because it reduces the radiation dose to patients. (atlantis-press.com)
  • Comparison of Deep-Learning Image Reconstruction With Hybrid Iterative Reconstruction for Evaluating Lung Nodules With High-Resolution Computed Tomography. (cdc.gov)
  • Features such as Philips' iDose, our iterative model reconstruction, or Philips' metal artifact reduction application, are important to improving image quality while minimizing dose. (24x7mag.com)
  • Iterative algorithm for metal artifact reduction allows artifacts caused by a hip implant to be reduced significantly. (lu.se)
  • The purpose of our study was to investigate currently used radiation doses for CT in computer-assisted navigation in sinus surgery (CAS-CT) and to assess minimal doses required. (ajnr.org)
  • 8 It is, therefore, mandatory to perform computer-assisted navigation in sinus surgery (CAS-CT) with radiation doses as low as possible. (ajnr.org)
  • Radiation doses from CT enterography can be dramatically reduced with the use of iterative reconstruction. (auntminnie.com)
  • Cumulative radiation doses from repeated CT enterography in patients with inflammatory bowel disease can be very high, so efforts to reduce radiation dose with new dose reduction techniques are needed," explained Dr. Ravi Kaza from the University of Michigan. (auntminnie.com)
  • In addition, recent advances in detector and reconstruction technology have seen the radiation doses for a CT examination drop well below published industry-standard Dose Reference Levels (DRLs). (medical.canon)
  • CT is associated with higher radiation doses than other radiation-based medical examinations such as plain radiography and most nuclear medicine examinations. (lu.se)
  • Consequently it is of great importance to minimize radiation doses. (lu.se)
  • This novel algorithm was then applied to 50 patients with a suspected acute complication of known Crohn's disease and the raw data reconstructed with FBP, adaptive statistical iterative reconstruction (ASiR) and model based iterative reconstruction (MBIR). (ucc.ie)
  • Modified dose CT images with MBIR were also compared with contemporaneous abdominal radiograph, where performed, in terms of diagnostic yield and radiation dose. (ucc.ie)
  • In the phantom and cadaveric models, both forms of iterative reconstruction examined (ASiR and MBIR) were superior to FBP across a wide variety of imaging protocols, with MBIR superior to ASiR in all areas other than reconstruction speed. (ucc.ie)
  • We established that ASiR appears to work to a target percentage noise reduction whilst MBIR works to a target residual level of absolute noise in the image. (ucc.ie)
  • Modified dose CT images reconstructed with both ASiR and MBIR were non-inferior to conventional dose CT with FBP in terms of diagnostic findings, despite reduced subjective and objective indices of image quality. (ucc.ie)
  • Find out how model-based iterative reconstruction (MBIR) came out on top in this Monday scientific session. (auntminnie.com)
  • Scores were 2.5 for ASIR versus 3.2 for MBIR for bowel wall, 2.9 versus 3.4 for mesenteric vessels, 2.2 versus 3 for liver, and 2.5 versus 3.1 for overall image adequacy, at a mean effective dose of 1.3 ± 0.5 mSv. (auntminnie.com)
  • GE is already working on a version of this technology, called MBIR (model-based IR), which is currently in testing at GE luminary sites and will be commercialized later this year outside the U.S. It will not take the place of ASIR, but rather be used on special cases. (diagnosticimaging.com)
  • GENESIS Edition provides sharper image detail and lower patient dose with the world's first fully integrated MBIR (Model-Based Iterative Reconstruction) solution. (medical.canon)
  • Our iterative reconstruction method, Intelli IPV* 1 , provides images which maintain their natural texture even at high noise reduction rates and their excellent visibility even at low doses, and does not require a dedicated operation room or additional hardware. (fujifilm.com)
  • When modulating the tube current, it is possible to set scanning conditions that optimize not only conventional iterative processing but also Intelli IPV characteristics. (fujifilm.com)
  • Iterative processing Intelli IPV maintains normal image texture, even at a high dose reduction ratio, as well as reducing the noise, resulting in improved visibility. (fujifilm.com)
  • Adaptive scatter correction removes scatter through intelligent modeling that preserves more primary photons for reconstruction as compared to a hardware-based approach. (medical.canon)
  • X-ray Distribution - Adaptive Beam shaping optics ensure homogenous photon spread to maximize resolution for each clinical task while minimizing dose for patients of all shapes and sizes. (medical.canon)
  • The vast dose difference between institutions mirrors different attitudes toward image quality and radiation-protection issues rather than being technically founded, and many patients undergo CAS-CT at higher doses than necessary. (ajnr.org)
  • The only limit for dose reduction in CT for computer-assisted endoscopic sinus surgery is the ENT surgeon's ability to cope with impaired image quality, whereas there is no technically justified lower dose limit. (ajnr.org)
  • When no diagnostic image quality is needed, even a reduction down to a third is possible. (ajnr.org)
  • This cost-efficient scanner delivers outstanding image quality, at the right dose. (siemens-healthineers.com)
  • Increase your clinical capabilities with a scanner that supports daily routine while striking the perfect balance between the right dose and excellent image quality for all patients 1 . (siemens-healthineers.com)
  • How can I balance CT dose and image quality? (siemens-healthineers.com)
  • But minimizing radiation dose without compromising on image quality is critical for children, or patients who need multiple scans. (siemens-healthineers.com)
  • The renaissance, rediscovery and refinement of iterative reconstruction removes this limitation allowing either an improvement in image quality without increasing radiation dose or maintenance of image quality at a lower radiation dose compared with traditional image reconstruction. (ucc.ie)
  • This thesis is fundamentally an exercise in optimisation in clinical CT practice with the objectives of assessment of iterative reconstruction as a method for improvement of image quality in CT, exploration of the associated potential for radiation dose reduction, and development of a new split dose CT protocol with the aim of achieving and validating diagnostic quality submillisiever t CT imaging in patients with Crohn's disease. (ucc.ie)
  • Conventional dose CT images with FBP reconstruction were used as the reference standard with which the modified dose CT images were compared in terms of radiation dose, diagnostic findings and image quality indices. (ucc.ie)
  • As there are multiple possible user-selected strengths of ASiR available, these were compared in terms of image quality to determine the optimal strength for this modified dose CT protocol. (ucc.ie)
  • The overall optimal ASiR strength for the modified dose protocol used in this work is ASiR 80%, as this provides the most favourable balance of peak subjective image quality indices with less objective image noise than the corresponding conventional dose CT images reconstructed with FBP. (ucc.ie)
  • The Visual Model is a technology that controls image noise and image quality by iterative processing based on statistical model, object model, and physics model. (fujifilm.com)
  • Image quality and pathology assessment in CT Urography: when is the low-dose series sufficient? (biomedcentral.com)
  • Optimisation is not only about patient dose and image quality but also about the diagnostic task at hand, i.e. the correct examination technique for a specific diagnostic enquiry in accordance to the ALARA (radiation dose as low as reasonably achievable) and AHARA (image quality as high as reasonably achievable) principles [ 2 , 3 ]. (biomedcentral.com)
  • Just about every aspect of image quality and patient safety relating to CT scanning will be impacted in a positive way by iterative reconstruction," Rubin said. (diagnosticimaging.com)
  • Simple image quality measures, such as standard deviation and contrast-to-noise ratio, which do not include the effects of properties such as image texture and signal power, can be misleading, particularly as they relate to radiation dose. (medical.canon)
  • This results in a better balance between image quality and dose. (medical.canon)
  • X-ray Transmission - GENESIS utilizes raw data based scatter modeling and correction technology to ensure uniform image quality. (medical.canon)
  • For example, the Diagnostic reference level (DRL), which is a measure of the radiation dose for radiological diagnosis, has been introduced in many countries, defining standards to promote scanning at the lowest possible dose consistent with maintaining high image quality. (fujifilm.com)
  • Lowering kVp from 120 to 70 with use of high-pitch 2.2 or 3.2 protocol resulted in up to 80% dose reduction without significantly affecting image quality. (edu.au)
  • Overall, the MA-ROOSTER method, which utilizes a 4D-CT motion model for temporal regularization, had the best and most consistent image quality and accuracy. (wustl.edu)
  • The review is to ensure protocols and procedures are "correct with the intended dose and image quality. (tranow.com)
  • For examinations that require manual or fixed mA/kV settings as a result of individual patient or scanner/protocol specific factors, technologists are empowered and encouraged to adjust mA, kV or other scan parameters based on patient size (including such variables as height, weight, body mass index and/or lateral width) with the goals of reducing radiation dose and maintaining diagnostic image quality. (tranow.com)
  • An important area for a medical physicist is the optimization of the radiation dose and image quality. (lu.se)
  • The challenge is to establish sufficient image quality for a specific diagnostic task with the lowest effective dose to the patient. (lu.se)
  • The aim is to optimise image quality and radiation dose to the patient. (lu.se)
  • Evaluation of automatic exposure control in CT to achieve a desired level of image quality and to reduce radiation dose 1 (Figure 1). (lu.se)
  • The modulation is performed according to the phantoms size, shape and attenuation to ensure optimal image quality and minimal radiation dose. (lu.se)
  • Evaluation of iterative CT reconstruction for image quality improvements and dose reduction 2, 3 (Figure 2). (lu.se)
  • 3. Evaluation of an iterative model-based reconstruction of pediatric abdominal CT with regard to image quality and radiation dose. (lu.se)
  • 4. Evaluation of image quality and radiation dose of abdominal dual-energy CT. (lu.se)
  • The purpose of our study was to assess the potential benefit of IR in head CT by comparing objective and subjective image quality with standard FBP at various dose levels. (ajnr.org)
  • Compared with FBP, IR resulted in lower image noise ( P ≤ .02), higher CNR ( P ≤ .03), and improved subjective image quality ( P ≤ .002) at all dose levels. (ajnr.org)
  • Compared with conventional FBP, IR of head CT is associated with significant improvement of objective and subjective IQ and may allow dose reductions in the range of 20% without compromising standard image quality. (ajnr.org)
  • Recent advancements in CT scanning technology have focused on improving image quality while reducing radiation dose. (sigfox.us)
  • The proposed algorithm eliminates the effects of the point spread function in the process of low-dose medical CT image reconstruction and improves the reconstructed image quality. (springeropen.com)
  • Thus, a denoising algorithm is essential for enhancing the image quality of low-dose CT (LDCT) images. (atlantis-press.com)
  • This resulted in the development of an optimised, refined and appropriate split dose protocol for CT of the abdomen and pelvis in clinical patients with Crohn's disease allowing contemporaneous acquisition of both modified and conventional dose CT studies. (ucc.ie)
  • As with any major innovation, a physics-based performance evaluation is critical to understanding and optimizing the Precision's ultra-high resolution modes in clinical use. (medical.canon)
  • RATIONALE AND OBJECTIVES: To accurately identify the high-risk pathological factors of pulmonary nodules, our study constructed a model combined with clinical features, radiomics features, and deep transfer learning features to predict high-risk pathological pulmonary nodules. (bvsalud.org)
  • RESULTS: The clinical model achieved an AUC of 0.774 (95% CI: 0.728-0.821) in the training cohort and 0.762 (95% confidence interval [CI]: 0.650-0.873) in the external validation cohort. (bvsalud.org)
  • The combined model demonstrated superiority over both the clinical model and the Rad-DTL model. (bvsalud.org)
  • There were no statistically significant differences observed in the comparison between the combined model incorporating clinical features and the Rad-DTL model. (bvsalud.org)
  • Corrigendum to 'Ultra-low dose abdominal MDCT: Using a knowledge-based Iterative Model Reconstruction technique for substantial dose reduction in a prospective clinical study' [Eur. (cuanschutz.edu)
  • Ultra-low dose abdominal MDCT: using a knowledge-based Iterative Model Reconstruction technique for substantial dose reduction in a prospective clinical study. (cuanschutz.edu)
  • GENESIS Edition transforms routine imaging to new levels of image detail and low contrast resolution - balanced for each clinical question at the right dose. (medical.canon)
  • A full volumetric reconstruction for routine clinical use can be obtained in just 3 minutes. (medical.canon)
  • Following Canon's longstanding philosophy of minimizing dose while maintaining efficient clinical workflow, FIRST integrates seamlessly into your daily clinical practice. (medical.canon)
  • But with ADMIRE technology, the latest generation of iterative reconstruction, physicians and radiologists have access to increased display quality with a natural impression and all clinical applications with such a low dose level that exceeds all expectations. (radiochirurgia.hr)
  • The collective AIDR 3D process results in robust noise reduction, which is essential for achieving ultra-low-dose examinations in routine clinical imaging. (medical.canon)
  • In this review, we focus on the potential applications of AI in the field, both from a physical (radiomics, underlying statistics, image reconstruction and data analysis) and a clinical (neurology, cardiology, oncology) perspective. (springer.com)
  • To reduce the damage of X-ray to the human body, it is necessary to study the low-dose CT imaging problem without sacrificing the clinical diagnosis information. (springeropen.com)
  • With SAFIRE technology, Siemens has set a low-dose display scale with iterative reconstruction based on raw data. (radiochirurgia.hr)
  • With this, SAFIRE can reduce the radiation dose by up to 60% and improve the display quality (contrast, sharpness and interference). (radiochirurgia.hr)
  • Methods: The authors cast the reconstruction as a compressed sensing problem based on l 1 norm minimization constrained by statistically weighted least-squares of CBCT projection data. (elsevierpure.com)
  • For accurate modeling, the noise characteristics of the CBCT projection data are used to determine the relative importance of each projection measurement. (elsevierpure.com)
  • Both sparse sampling and decreasing x-ray tube current (i.e., noisy projection data) lead to the reduction of radiation dose in CBCT imaging. (elsevierpure.com)
  • In FIRST, a reconstruction from the original (measured) projection data is performed with traditional FBP to create a seed image. (medical.canon)
  • Low-dose medical CT imaging is to reconstruct CT image by incomplete projection data or coarse data. (springeropen.com)
  • However, some reconstruction methods based on the Nyquist sampling theorem restrict low-dose medical CT reconstruction by incomplete projection data. (springeropen.com)
  • Scan preparation and image reconstruction workflows are often time-consuming, and prevent you from focusing on what matters: your patients. (siemens-healthineers.com)
  • Primarily, automation technologies are standardizing the way CT is performed in terms of the scan range and reconstruction, and that automation is driving the increased standardization of CT outcomes, reducing the variability within those outcomes as well. (24x7mag.com)
  • STRATON ™ tubes with z-Sharp ™ technology and its revolutionary design based on direct anode cooling eliminates the need for heat retention and provides true temporary resolution up to 150ms and a high isotropic resolution of 0.33 mm for any scan, rotation speed and from any position within scanned area. (radiochirurgia.hr)
  • Recent advancements in sparse-view 4D-CBCT reconstruction have opened the possibility to reduce scan time and dose. (wustl.edu)
  • Results suggest the potential for reducing scan time and dose for 4D-CBCT. (wustl.edu)
  • This is a sophisticated process because additional information concerning the focal spot size (optics model), photoelectric noise (statistical model), the cone beam trajectory (cone beam model), and the exact scan parameters (system model) are utilized in the update process. (medical.canon)
  • The IQon Spectral CT is the world's first detector-based CT, delivering multiple layers of retrospective data in a single, low-dose scan. (philips.com)
  • With Biograph Vision Quadra, you achieve the same outstanding detail and definition that you have come to expect-increased detectability of smaller lesions, reduced scan time and effective dose, and faster evaluation of treatment impact. (siemens-healthineers.com)
  • Therefore, following the As Low As Reasonably Achievable (ALARA) principle is of the utmost importance in clinics when determining the radiation dose level of a CT scan. (atlantis-press.com)
  • BERT based natural language processing for triage of adverse drug reaction reports shows close to human-level performance (PLOS Digital Health, 2023). (lu.se)
  • Comparison of dyskinesia profiles after L-DOPA dose challenges with or without dopamine agonist coadministration (Neuropharmacology, 2023). (lu.se)
  • Enhanced noise suppression of newer iterative image reconstruction techniques provides diagnostically adequate CT enterography examinations at very low radiation dose," Kaza concluded. (auntminnie.com)
  • The low-dose CT (LDCT) seems to be sufficient in differentiating between normal and pathological examinations. (biomedcentral.com)
  • Improved access to medical examinations results in X-ray dose increase. (fujifilm.com)
  • Measures are being taken worldwide to mitigate the exposed dose as the number of examinations increases. (fujifilm.com)
  • Is the reconstruction time fast enough to be used for routine examinations? (fujifilm.com)
  • In accordance with the ALARA principle, TRA Medical Imaging policies and protocols promote the utilization of radiation dose reduction techniques for all CT examinations. (tranow.com)
  • Because this process is coupled with anatomically based noise regularization, FIRST is incredibly robust for data with extremely low photon counts, which translates to an opportunity to achieve significant reductions in radiation dose for all examinations. (medical.canon)
  • Simplifying size-specific radiation dose estimates in pediatric CT. (cuanschutz.edu)
  • Image noise in low-dose scans might interfere with the registration algorithm, especially because a surface-rendered image ( Fig 1 ) is used for registration. (ajnr.org)
  • The fundamental limitation with conventional CT raw data reconstruction was the inherent coupling of administered radiation dose with observed image noise - the lower the radiation dose, the noisier the image. (ucc.ie)
  • PCCT improves the contrast-to-noise ratio of vascular structures imaged on chest CT when compared with conventional CT and reduces radiation dose. (auntminnie.com)
  • The Physics Model is a technology that uses FBP as a model and reduces noise while adjusting the texture from high frequencies to low frequencies at a uniform ratio, achieving a texture close to that of FBP. (fujifilm.com)
  • Noise reduction is performed by statistically evaluating X-ray-derived noise and circuit system noise. (fujifilm.com)
  • The Physics Model reduces noise present in the FBP by adjusting the texture at a uniform rate, from high frequency to low frequency, and achieves a texture close to FBP. (fujifilm.com)
  • Statistical Model statistically reduces both the X-ray noise and electrical noise. (fujifilm.com)
  • The noise reduction effect has up to 9 selectable intensity levels (Standard: Lv.1〜4 and Strong: Lv.1〜5) for each anatomical region. (fujifilm.com)
  • Achieves image noise reduction up to 90%, radiation dose reduction up to 83%, and improves low contrast detection capability up to 2 times. (fujifilm.com)
  • In addition to advanced IR techniques, we describe novel CT noise-reduction methods based on convolutional neural networks (CNNs). (academic-accelerator.com)
  • A GPU-based Monte Carlo tool was used to simulate the primary, scatter, and quantum noise signals. (wustl.edu)
  • All five methods rendered significant reduction in noise and streaking artifacts when compared to the conventional Feldkamp-Davis-Kress (FDK) algorithm. (wustl.edu)
  • Using IR the image noise is decreased and there is potential to lower the radiation dose. (lu.se)
  • This iterative algorithm is superior to non-iterative approaches in removing background noise while preserving diagnostic information. (medical.canon)
  • IR has recently demonstrated its capacity to reduce noise and permit dose reduction in abdominal and thoracic CT applications. (ajnr.org)
  • In the past decade, various dose-reduction strategies, such as automated tube current modulation, low voltage scanning, and noise-reduction filters, have been explored but could not prevent a steady increase of average effective dose with advanced scanner technology. (ajnr.org)
  • 4 - 9 Unfortunately, the most straightforward technique in lowering dose, notably the reduction of tube current, is associated with unacceptable increase of image noise. (ajnr.org)
  • With FBP, increased spatial resolution is directly correlated with increased image noise and is traded against noise by application of different reconstruction kernels. (ajnr.org)
  • This is attributed to the lack of statistical information about the specific signal and noise in the image reconstruction. (springeropen.com)
  • In low-dose medical CT image reconstruction, the ill-posed problem is often caused by noise. (springeropen.com)
  • The increased dose may destroy the structure of the sample before sufficient image signal-to-noise is reached. (nature.com)
  • Experimental results demonstrated that the introduced HRNet-based denoiser outperformed the benchmarked U-Net-based denoiser, as it provided superior image resolution preservation and comparable, if not better, noise suppression. (atlantis-press.com)
  • The main problem is that, as a consequence of Poisson statistics, the required illumination dose is inversely proportional to the square of the spatial resolution 7 , and thus improving spatial resolution means quadratically higher doses. (nature.com)
  • Mean dose reductions of 72.9-73.5% were achieved with the modified dose protocol with a mean effective dose of 1.26mSv. (ucc.ie)
  • We recommend, generally, doses used for the typical diagnostic low-dose sinus CT (120 kV/20-50 mAs). (ajnr.org)
  • CT delivers some of the highest doses of ionising radiation in diagnostic radiology. (ucc.ie)
  • Once a medical imaging examination is deemed justified, there is an onus on the imaging team to endeavour to produce diagnostic quality CT images at the lowest possible radiation dose to that patient. (ucc.ie)
  • Approximately 20-30% of these patients with symptoms of visible blood have negative outcomes and are being subjected to diagnostic imaging tests and radiation related risks based on the presence of macro-hematuria [ 6 ]. (biomedcentral.com)
  • Lower signal, lower voltage, lower dose - the new Stellar detector at the same time improves patient healing and reduces risk without compromising display quality and diagnostic assessment. (radiochirurgia.hr)
  • Conclusions: Low-dose CT pulmonary angiography protocols comprising 70 kVp and high pitch 2.2 or 3.2 allow for detection of peripheral PE with significant reduction in radiation dose while images are still considered diagnostic. (edu.au)
  • Diagnostic efficiency of existing guidelines and the AI-SONIC™ artificial intelligence for ultrasound-based risk assessment of thyroid nodules. (cdc.gov)
  • Artificial intelligence-based model for lymph node metastases detection on whole slide images in bladder cancer: a retrospective, multicentre, diagnostic study. (cdc.gov)
  • Misra says the company's advanced dose reduction technology, AIDR 3D, is available in all its scanners, even the entry level machines, something unique among manufacturers. (dotmed.com)
  • Building on Aquilion Precision's hardware advancements, next generation AIDR *1 3D, a fast hybrid reconstruction algorithm, and FIRST *2 , a fully-iterative reconstruction algorithm, have both been optimized specifically for Precision. (medical.canon)
  • AIDR 3D is a sophisticated algorithm that has been designed to work in both the raw data and reconstruction domains. (medical.canon)
  • IR can also be used to better separate the differences in attenuation between calcium and iodine, allowing a reduction in the dose of contrast medium when performing contrast-enhanced CT. (diagnosticimaging.com)
  • Evaluation of amount of intravenous contrast medium in relation to radiation dose 8, 9 . (lu.se)
  • Point Organ Radiation Dose in Abdominal CT: Effect of Patient Off-Centering in an Experimental Human Cadaver Study. (cuanschutz.edu)
  • Possible Radiation Dose Reduction in Abdominal Plain CT Using Deep Learning Reconstruction]. (cdc.gov)
  • 7. Estimation of foetal radiation dose in a comparative study of pelvimetry with conventional radiography and different computer tomography methods. (lu.se)
  • Compared with conventional atomic-resolution STEM imaging techniques, the mixed-state ptychographic approach simultaneously provides a four-times-faster acquisition, with double the information limit at the same dose, or up to a fifty-fold reduction in dose at the same resolution. (nature.com)
  • Techniques involved in the five methods included iterative optimization, motion-compensation, and deformation of the prior 4D-CT. (wustl.edu)
  • Evaluation of CT pelvimetry in terms of foetal radiation dose and measurement accuracy 7 . (lu.se)
  • If CS is applied in the field of CT image reconstruction, the decrease of the measurement value can greatly shorten the scanning time and reduce the scanning dose. (springeropen.com)
  • Together, we have developed new procedures for better patient care, automated workflows, and refined reconstruction technology to make the remarkable routine. (medical.canon)
  • Finally, attenuation measurements in organs, tissues, etc. with each reconstruction algorithm were compared to assess for preservation of tissue characterisation capabilities. (ucc.ie)
  • Objective To assess reductions of cerebral glucose metabolism in Parkinson's disease (PD) with 18F-fluorodeoxyglucose (FDG) positron emission tomography (PET), and their associations with cognitive decline. (bmj.com)
  • Our model can help assess effectiveness of the vaccination program, which is crucial for curbing the COVID-19 pandemic. (cdc.gov)
  • These practices would facilitate sharing of using pharmacokinetic models in chemical risk assess- models and model evaluations and consistent applica- * tions in risk assessments. (cdc.gov)
  • Furthermore, Morin says, there's little incentive for radiologists performing exams to lower PET radiation dose. (radiologytoday.net)
  • Despite the financial and logistical disincentives, lowering dose on the PET side has been a priority for equipment manufacturers and radiologists concerned about what's best for the patient. (radiologytoday.net)
  • Models morphological information changes to control the size, shape and position of a structure. (fujifilm.com)
  • The Object Model keeps the structure in consideration of the shape, size, contrast, position, etc. of the structure by modeling the change of morphological information. (fujifilm.com)
  • While checking all CT protocols at our neuroradiologic department for radiation-reduction potential, we considered lowering the dose for CAS-CT. (ajnr.org)
  • Consultation with the manufacturer gave no evidence that technical reasons inherent in the image-guidance system justify a higher dose for CAS-CT, but we did not find dedicated low-dose protocols for CAS-CT in the literature either. (ajnr.org)
  • The aim of this study was to utilize a 3D printed pulmonary model with simulation of small thrombus in the pulmonary arteries for development of optimal CTPA protocols. (edu.au)
  • We suggest that each site speak to the manufacturer to define machine specific parameters to produce the best images on each scanner modeled on the requirements in these online protocols. (tranow.com)
  • As a result, establishing criteria for dose reduction protocols requires much more coordination and oversight than CT alone. (radiologytoday.net)
  • A questionnaire inquiring about dose parameters used for CAS-CT was sent to 30 radiologic institutions. (ajnr.org)
  • Scans are performed effortlessly with low-dose parameters. (medical.canon)
  • Unlike the implementation based on PI segment, the algorithm complexity of our … implementation can be estimated with several important imaging parameters. (iospress.com)
  • Photon-counting CT (PCCT) effectively visualizes pulmonary embolism and reduces radiation dose by 48% compared with traditional CT. (auntminnie.com)
  • 3D reconstruction of cardiac CT images could aid in follow-up strategies for pulmonary nodule screening. (auntminnie.com)
  • Decision curve analysis (DCA) indicated that the models provided a net benefit in predicting high-risk pathologic pulmonary nodules. (bvsalud.org)
  • Methods: Animal blood clots were inserted into the pulmonary arteries to simulate peripheral embolism based on a realistic 3D printed pulmonary artery model. (edu.au)
  • I then pursued a postdoc at Johns Hopkins with Dr. Jeff Siewerdsen in Biomedical Engineering, developing reconstruction and registration methods for x-ray based image-guided surgery. (stanford.edu)
  • The widely adopted atomic-resolution imaging methods in scanning transmission electron microscopy (STEM), such as annular dark-field (ADF) or coherent bright-field (cBF) imaging, are intrinsically dose inefficient as they use only a small fraction of the scattered electrons, being constructed via a simple integration of a limited portion of phase space. (nature.com)
  • 2. Model characterization i.e., methods to describe how rently being extended to integrate dose-response analysis. (cdc.gov)
  • Results: The method converges fast to the optimal solution without excessive memory requirement, thanks to the method of iterative forward and back-projections. (elsevierpure.com)
  • This effect is partly due to limitations in the current standard reconstruction method of FBP. (ajnr.org)
  • FIRST utilizes forward projection iterations to deliver high-quality images with up to 82% dose reduction. (medical.canon)
  • Functional imaging of tumor vasculature using iodine and gadolinium-based nanoparticle contrast agents: a comparison of spectral micro-CT using energy integrating and photon counting detectors. (academic-accelerator.com)
  • The 3D printed model was scanned with 192-slice 3rd generation dual-source CT with 1 mm slice thickness and 0.5 mm reconstruction interval. (edu.au)
  • ENT surgeons were able to identify anatomic landmarks on scans with a dose as low as 3.1 mGy. (ajnr.org)
  • The Neuro ONE protocol allows acquisition of multiple low-dose volume scans of the entire brain during contrast infusion to provide whole-brain perfusion and whole-brain dynamic vascular analysis in one examination. (medical.canon)
  • As CT scanning becomes more wide-spread, the propotion of X-ray dose exposure resulting from CT scans increases. (fujifilm.com)
  • Advances in knowledge: Our study describes novel CT-derived random forest models based on radiologist-interpretation of CT scans (semantic features) that can assist NSCLC classification when histopathology is equivocal or when histopathological sampling is not possible. (academic-accelerator.com)
  • However, the radiation dose involved in X-ray CT scans constitutes a potential health concern to the human body, since it may induce genetic, cancerous, and other diseases. (atlantis-press.com)
  • Canon accelerated computational throughput to bring their iterative reconstruction technique to the clinic where extensive reconstruction times are not acceptable. (medical.canon)
  • Lowering PET dose can affect throughput and department efficiency for little if any gain. (radiologytoday.net)
  • While data leaks should be prevented, it is also crucial to examine the trade-off between the privacy protection and model utility of proposed approaches. (paperswithcode.com)
  • Simulations have suggested the possibility of extremely low-dose imaging by electron ptychography, in principle beyond that of all other electron imaging approaches to date including high-resolution TEM imaging widely used in Cryo-EM community-a potential outcome of considerable importance for the study of electron radiation-sensitive materials including biological macromolecules. (nature.com)
  • While documentation to the same degree as a uum of increasingly data-informed approaches to dose- model proposed for use in risk assessment is unnecessary, response characterization that increasingly incorporate understanding of the alternatives considered is important more information and as such, contribute to better under- in supporting the model structure eventually selected ( Bar- standing and precision in estimating risks. (cdc.gov)
  • Linear regression analysis of CNR against tube current suggests that standard CNR may be obtained until approximately 20.4% dose reduction when IR is used. (ajnr.org)
  • Dose reduction for chest CT: comparison of two iterative reconstruction techniques. (cuanschutz.edu)
  • Padole A, Ali Khawaja RD, Kalra MK, Singh S. CT radiation dose and iterative reconstruction techniques. (cuanschutz.edu)
  • To reduce radiation dose in children, several strategies and techniques are available, including iterative reconstruction techniques. (medscape.com)
  • With all high-end technology and treatment techniques at the linac's side, we can target the radiation dose very accurately," Mr. Bolard says. (philips.com.tr)
  • Because of their unprecedented success in computer vision, deep learning (DL)-based techniques have been used for LDCT denoising. (atlantis-press.com)
  • Conclusions Reductions in cortical FDG metabolism were present in newly diagnosed PD, and correlated with performance on neuropsychological tests. (bmj.com)
  • AutoPose supports several reference lines setting, such as OM Line (Orbitomeatal base line), SM Line (Superior orbitomeatal line) and RB Line (Reid's base line), for head scanning. (fujifilm.com)
  • Since the overlap required in helical scanning is eliminated, patient exposure dose can be reduced. (medical.canon)
  • The feasibility of low-dose registration was tested with a phantom. (ajnr.org)
  • Phantom registration was possible with doses as low as 1.1 mGy. (ajnr.org)
  • The basic principle of dual energy CT is material decomposition based on attenuation differences at different energy levels. (lu.se)
  • The Bayesian inference offers the potential to exactly estimate the original signal or effectively reduce the radiation dose by compress sensing. (springeropen.com)
  • Automatic determination of pubertal growth spurts based on the cervical vertebral maturation staging using deep convolutional neural networks. (cdc.gov)
  • There is an increase in interest to model driving maneuver patterns via the automatic unsupervised clustering of naturalistic sequential kinematic driving data. (paperswithcode.com)
  • For the first time, synogram data is used in the process of improving iterative representations. (radiochirurgia.hr)
  • The multiple data sets are automatically combined to a wide volume, when combined with ECG gating whole thorax low-dose gated vascular studies can be acquired. (medical.canon)
  • A novel deep learning model for breast lesion classification using ultrasound Images: A multicenter data evaluation. (cdc.gov)
  • To model estimated deaths averted by COVID-19 vaccines, we used state-of-the-art mathematical modeling, likelihood-based inference, and reported COVID-19 death and vaccination data. (cdc.gov)
  • We used a partially observed Markov process ( 6 ) model and maximum-likelihood-based iterative filtering technique to fit and make predictions on the mortality data by susceptible-exposed-infectious-recovered-type models ( Appendix ). (cdc.gov)
  • As such, it provides a transparent basis for defining the suf- ical events with respect to mode of action and the ficiency of data on mode of action that is needed to inform strengths and limitations of available model and data, the use of physiologically based pharmacokinetic models in e.g., sensitivity analyses, risk assessment. (cdc.gov)
  • For example, modellers often try pharmacokinetic model, particularly a physiologically several alternative structures as they attempt to reconcile based pharmacokinetic (PBPK) model, to contribute to a the available data and the description of the biology in risk assessment. (cdc.gov)
  • 9 - 11 Second, we used a high-dose protocol for optimal soft-tissue delineation (140 mAs). (ajnr.org)
  • Parametric Model-based 2-D Autofocus Approach for General BiSAR Filtered Backprojection Imagery (IEEE Transactions on Geoscience and Remote Sensing, 2022). (lu.se)
  • Managers of imaging centers, orthopedic clinics, urgent care centers, and hospitals were all interested in Carestream's OnSight 3D Extremity system because this compact system provides high-quality, lower-dose 3D imaging studies. (24x7mag.com)
  • Disentangling real-time variation in β ( t ) and the effectiveness of vaccination is crucial for assessing the vaccination program and might only be achievable through mathematical modeling. (cdc.gov)
  • Artificial intelligence-supported applications in head and neck cancer radiotherapy treatment planning and dose optimisation. (cdc.gov)
  • This allows, for example, a significant reduction in moving artifacts in the heart to perform accurate stenosis measurements or stent planning with extreme precision. (radiochirurgia.hr)
  • Radiation dose from a general CT examination of the thorax is approximately five times the natural background radiation a person is exposed to in a year. (lu.se)