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Cone beam computedSingle-Photon EmiMicro computed tomographySPECTCBCTAlgebraic ReconstructionImagingBeam computedProjectionsAnatomicalAlgorithmIterative reconstruction algorithms2022AlgorithmsAbstractUltrasoundImageConventionalMandibleDimensional2021ClinicalTissueMultiplanarDataEnablesImagesScansThicknessMeasurementDrivenMethodPROGRESS
Cone beam computed3
Single-Photon Emi2
  • Single-photon emission computed tomography (SPECT, or less commonly, SPET) is a nuclear medicine tomographic imaging technique using gamma rays. (wikipedia.org)
  • METHOD: Seventy-six patients (bone-, cardiac- and lung scan) were scanned on a conventional gamma camera (planar and/or single-photon emission computed tomography [SPECT]/SPECT-CT) used in clinical routine and on the ring-configurated CZT camera Starguide (GE Healthcare). (lu.se)
Micro computed tomography1
  • More precise results were expected by using micro-computed tomography with a resolution of about 0.1 mm and three-dimensional reconstructions based on previous greyscale analyses and histological verification. (biomedcentral.com)
SPECT2
  • The recently developed versatile emission computed tomography (VECTor) technology enables high-energy SPECT and simultaneous SPECT and PET of small animals at sub-mm resolutions. (nih.gov)
  • SPECT, which uses a rotating camera system and tomographic reconstruction to produce a 3-dimensional image, is more common in the United States. (msdmanuals.com)
CBCT5
  • There are two phases in CBCT imaging: the acquisition phase and the reconstruction phase. (dentalcare.com)
  • Methods: were evaluated 54 pairs of conventional panoramic radiography and CBCT panoramic MIP reconstructions. (bvsalud.org)
  • Results: the inter-examiner correlation was high for both the conventional panoramic radiography and CBCT panoramic MIP reconstructions (0.86±0.07 and 0.88±0.07, respectively). (bvsalud.org)
  • Most CBCT systems have high efficacy for 3D image reconstruction of cortical bone with thicknesses over 1 mm while they have poor efficacy for image reconstruction of cortical bone with less than 0.5 mm thickness. (opendentistryjournal.com)
  • 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)
Algebraic Reconstruction1
  • Classic algebraic reconstruction technology (ART) for computed tomography requires pre-determined weights of the voxels for projecting pixel values. (deepai.org)
Imaging12
  • These secondary images are derived from the primary or basis images and are those that the dentist may feel most comfortable using because of the similarity to other imaging in dentistry: panoramic reconstruction, lateral cephalometric, and posteroanterior (PA) cephalometric. (dentalcare.com)
  • This represents one of the first times that medical imaging and three-dimensional reconstruction methods have been applied to a large skull of a marine reptile. (peerj.com)
  • This data set may then be manipulated to show thin slices along any chosen axis of the body, similar to those obtained from other tomographic techniques, such as magnetic resonance imaging (MRI), X-ray computed tomography (X-ray CT), and positron emission tomography (PET). (wikipedia.org)
  • 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)
  • 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)
  • X-ray computed tomography is a noninvasive imaging modality capable of reconstructing exact density values of 3D objects. (oregonstate.edu)
  • The high-performance ROFEX ( RO ssendorf F ast E lectron beam X -ray tomography)imaging technique has been developed at Helmholtz-Zentrum Dresden-Rossendorf for the noninvasive investigation of dynamic processes. (hzdr.de)
  • When clinically significant symptoms of a cerebral stroke are detected, it is crucial to make an urgent diagnosis using available imaging techniques such as computed tomography (CT) scans. (techscience.com)
  • Improved Liver Lesion Conspicuity With Iterative Reconstruction in Computed Tomography Imaging. (lu.se)
  • Radionuclide imaging can expose patients to similar amounts of radiation than do comparable computed tomography (CT) studies. (msdmanuals.com)
  • Multispectral Optoacoustic Tomography is a powerful optoacoustic imaging system for small animal imaging. (lu.se)
  • Cardiovascular Imaging, Naval Medical Center Portsmouth, Board of Di- go to the ACR website at www.acr.org/ac to confirm that you are accessing rectors, Society of Cardiovascular Computed Tomography. (bvsalud.org)
Beam computed3
  • In this work we discuss a new algorithm for image reconstruction in half-scan fan-beam computed tomography (CT) and compare its performance with that of the conventional halfscan fan-beam filtered backprojection (FFBP) algorithm. (elsevierpure.com)
  • Yu, L & Pan, X 2002, ' Preliminary Investigation of a New Algorithm for Image Reconstruction in Half-scan Fan-beam Computed Tomography ', Paper presented at 2002 IEEE Nuclear Science Symposium Conference Record, Norfolk, VA, United States, 11/10/02 - 11/16/02 pp. 979-983. (elsevierpure.com)
  • Les tissus durs sont analysés au cône beam computed tomography à 6 et 12 mois. (bvsalud.org)
Projections8
  • Future generation x-ray computed tomography scanners will be characterized by their ability to record simultaneously a sufficient number of x-ray projections to allow reconstructions of multiple adjacent cross sections of the object under study. (elsevierpure.com)
  • A computer is then used to apply a tomographic reconstruction algorithm to the multiple projections, yielding a 3-D data set. (wikipedia.org)
  • Computed tomography requires radiographic projections from different angles. (hzdr.de)
  • If the image reconstruction were perfect, no deviation between measured and calculated projections would be observed. (ajnr.org)
  • In reality, due to the approximate nature of FBP reconstruction typically used for image reconstruction, there is a deviation between measured and calculated projections. (ajnr.org)
  • Computed Tomography is increasingly employed for non-destructive evaluation, with the aim of reconstructing a surface mesh of a scanned object from radiographic projections. (tu-bs.de)
  • We circumvent such artifacts in filtered backprojection reconstructions by optimizing the mesh's vertex positions using information taken directly from the projections, rather than from a voxel grid. (tu-bs.de)
  • Two-dimensional noise reconstruction in proton computed tomography using distance-driven filtered back-projection of simulated projections. (llu.edu)
Anatomical1
Algorithm3
  • 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)
  • Finally, attenuation measurements in organs, tissues, etc. with each reconstruction algorithm were compared to assess for preservation of tissue characterisation capabilities. (ucc.ie)
  • BACKGROUND: A novel semiconductor cadmium zinc telluride (CZT) gamma camera system using a block sequential regularized expectation maximization (BSREM) reconstruction algorithm is now clinically available. (lu.se)
Iterative reconstruction algorithms1
  • 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)
20221
  • Katsamenis, Orestis L. , Burson-Thomas, Charles , Basford, Philip J , Pickering, Brian and Browne, Martin (2022) The Reconstruction of Human Fingerprints From High-Resolution Computed Tomography Data: Feasibility Study and Associated Ethical Issues. (soton.ac.uk)
Algorithms2
  • We investigate algorithms based on exact computed tomography reconstruction formulas. (oregonstate.edu)
  • A framework to generate simulated X-ray computed tomography (XCT) data of ground truth (denoted here as "GT") flaws was developed for the evaluation of flaw detection algorithms using image comparison metrics. (asme.org)
Abstract2
  • Abstract This study presents a deep learning model for efficient intracranial hemorrhage (ICH) detection and subtype classification on non-contrast head computed tomography (CT) images. (techscience.com)
  • Abstract Computed tomography has made significant advances since its introduction in the early 1970s, where researchers have mainly focused on the quality of image reconstruction in the early stage. (techscience.com)
Ultrasound1
  • The machine is also equipped with ultrasound computed tomography for further insights. (lu.se)
Image11
  • There are two types of image reconstruction depending on the type of detector used. (dentalcare.com)
  • This enables RoI image reconstruction over finer pixels, hence improving the spatial resolution of the image. (unb.ca)
  • 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)
  • 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)
  • 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)
  • Computed tomography machines are deployed across the world to provide doctors with an image that reveals more detail than a standard x-ray image. (oregonstate.edu)
  • Here, we develop and validate dedicated image reconstruction methods that compensate for image degradation by incorporating accurate models for the transport of high-energy annihilation gamma photons. (nih.gov)
  • 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)
  • 10 , 11 In IR, a correction loop is introduced in the image reconstruction process. (ajnr.org)
  • This study aims to assess different image rendering techniques in the postmortem computed tomography for the evaluation of biological health and profile in stranded cetaceans in Hong Kong waters. (jove.com)
  • This helps guide radiologists, clinicians, and veterinarians through the often difficult and complicated realm of the postmortem computed tomography image rhetoric and review. (jove.com)
Conventional2
  • Contrary to conventional tomography systems, the ROFEX systems do not achieve this by mechanical rotation of the object or source-detector-compound. (hzdr.de)
  • To acquire high-quality reconstruction images with low dose radiation, CT reconstruction techniques have evolved from conventional reconstruction such as analytical and iterative reconstruction, to reconstruction methods based on artificial intelligence (AI). (techscience.com)
Mandible1
Dimensional3
  • The unusual three-dimensional preservation of the specimen permitted computed tomography (CT) scanning of individual braincase elements as well as the entire reassembled skull. (peerj.com)
  • Additionally, the CT data served as the basis for a new three-dimensional reconstruction of the skull, in which minor damage was repaired and the preserved bones digitally rearticulated. (peerj.com)
  • Previously, scapula fractures were mapped by transferring information from 3D computed tomography to a two-dimensional (2D) template. (healthpartners.com)
20211
  • En 2021 le CRSNG a accord 5,28 millions de dollars 44 chercheurs mis en candidature au concours de SAD. (gc.ca)
Clinical1
  • However, until now examination of the pulp cavity has been based on either sectioned teeth or clinical computed tomography. (biomedcentral.com)
Tissue1
  • Bär E, Volz L, Collins-Fekete CA, Brons S, Runz A, Schulte RW , Seco J. Experimental comparison of photon versus particle computed tomography to predict tissue relative stopping powers. (llu.edu)
Multiplanar2
  • During the reconstruction phase , the set of several hundreds of basis images will be sent to dedicated software that will then create a 3D volume reconstruction of the data volume (Figure 4) and multiplanar (MPR) reformatted images in axial, coronal, and sagittal orientation (Figure 5). (dentalcare.com)
  • The first one is multiplanar reconstruction, MPR. (jove.com)
Data2
  • This paper evaluates the capability of a novel technique to extract areal surface data from micro-focus X-ray computed tomography (XCT) from AM components and then generate surface parameter data per ISO 25178-2. (hud.ac.uk)
  • Furthermore, parameters characterizing the analyzed process, such as interfacial area of a turbulent gas-liquid flow, can be extracted from the gained data from both tomography planes. (hzdr.de)
Enables1
  • The IVIS Spectrum CT enables longitudinal workflows to characterize disease progression and therapeutic effect in animals throughout the complete experimental time frame with both quantitative CT and optical reconstructions. (lu.se)
Images4
  • Computed tomography (CT) produces slice (section) images using multiple exposures to x-ray beams. (unb.ca)
  • All these efforts are devoted to constructing high-quality images using only low doses with fast reconstruction speed. (techscience.com)
  • In this study, we propose a computer-aided diagnostic system (CAD) for categorizing cerebral strokes using computed tomography images. (techscience.com)
  • Kumar, H., DeSouza, S. V. & Petrov, M. S. Automated pancreas segmentation from computed tomography and magnetic resonance images: A systematic review. (springer.com)
Scans2
  • The ability of each system in the 3D reconstruction of different thicknesses of cortical bone was determined based on its visualization on the scans. (opendentistryjournal.com)
  • determined that 3D Computerized Tomography (CT) scans were more reliable compared to plain radiographs in terms of scapular angulation, translation, and glenopolar angle measurements. (healthpartners.com)
Thickness2
  • Cranex 3D with 4×6 cm 2 and 6×8 cm 2 FOVs and NewTom 3G with 5×5 cm 2 and 8×5 cm 2 FOVs showed significantly higher efficacy for 3D reconstruction of cortical bone with 0.6-1mm thickness while 3D Promax followed by NewTom 3G with 8×8 cm 2 FOV had the lowest efficacy for this purpose. (opendentistryjournal.com)
  • The study aimed to evaluate the diaphragm morphology (height and thickness) in single-lung transplantation (SLTx), using computed tomography (CT), by assessing the evolution of the hemidiaphragm of the transplanted and the native side. (frontiersin.org)
Measurement1
  • Ultrafast X-ray computed tomography has been primarily developed for the non-invasive measurement of the phase distribution within two-phase flows in vertical pipes. (hzdr.de)
Driven1
  • In order to determine axial velocities of structures within the object of investigation the ROFEX systems comprise a second tomography plane, which is driven intermittently to the first one, if required. (hzdr.de)
Method4
  • In this study, we propose a semi-case-wise learning-based method named Weight Encode Reconstruction Network (WERNet) to tackle the issues mentioned above. (deepai.org)
  • Computed Tomography Coronary Angiography (CTCA) is a non-invasive method. (deepai.org)
  • This effect is partly due to limitations in the current standard reconstruction method of FBP. (ajnr.org)
  • An Improved Method of Total Variation Superiorization Applied to Reconstruction in Proton Computed Tomography. (llu.edu)
PROGRESS1
  • A combined series of algorithmic, software, special-purpose computer architecture, and hardware implementation studies have demonstrated significant progress toward computed tomography reconstruction processing rates of 10**9 to 10**1**0 arithmetic operations per second. (elsevierpure.com)