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Optimizing rod window width in positron emission tomography
1995
IEEE Transactions on Medical Imaging
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A technique determines the optimal rod window width for rotating rod transmission studies in positron emission tomography VEX). Rod windowing reduces noise in rotating rod transmission studies. ...
When optimally determined, the rod window width maximines the noise effective coullts (NE0 collected in the transmission study. ...
Observing Optimal Window Width
Confirming the Optimal Window Width
cm Water Cylinder Transmission Profiles. ...
doi:10.1109/42.387708
pmid:18215830
fatcat:h4ted25jyzbxjpipadgytqrvb4
Optimizing rod window width in positron emission tomography
IEEE Conference on Nuclear Science Symposium and Medical Imaging
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A technique determines the optimal rod window width for rotating rod transmission studies in positron emission tomography VEX). Rod windowing reduces noise in rotating rod transmission studies. ...
When optimally determined, the rod window width maximines the noise effective coullts (NE0 collected in the transmission study. ...
Observing Optimal Window Width
Confirming the Optimal Window Width
cm Water Cylinder Transmission Profiles. ...
doi:10.1109/nssmic.1992.301085
fatcat:h6b6unohhfgztotfe7mcodgyv4
Positron range-free and multi-isotope tomography of positron emitters
2021
Physics in Medicine and Biology
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In Derenzo resolution phantoms 0.75 mm rods were clearly discernable for 124I, 89Zr and for simultaneously acquired 124I and 18F imaging. ...
Photons detected in the 511 keV window were used to reconstruct 18F images. Images were reconstructed iteratively using an energy dependent matrix for each isotope. ...
Acknowledgments This work financed by the research grant QUARAT: Quantitative Universal Radiotracer Tomography (TTW16885) which is financed in part by the Dutch Research Council (NWO). ...
doi:10.1088/1361-6560/abe5fc
pmid:33578400
fatcat:ix7cfccgyjgqxj34myuoyaukay
Numerical investigation of a transformable modular PET system: Consideration of point-spread functions, module arrangements, and operation protocols
2019
CENTRAL EUROPEAN SYMPOSIUM ON THERMOPHYSICS 2019 (CEST)
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Positron emission tomography (PET) is a powerful tool for mapping the dynamic distribution of substances in visually opaque systems. ...
In coordination with the purposely designed hardware, we develop adaptive data processing and image reconstruction pipelines. ...
INTRODUCTION Modular positron emission tomography (PET) systems, being scalable, relocatable, and rearrangeable, are more adaptable to changing objects, conditions, and resolution requirements compared ...
doi:10.1063/1.5114560
fatcat:2lm7b4f4ufbe5keg6fzxbw2n5m
Image quality analysis of 44Sc on two preclinical PET scanners: a comparison to 68Ga
2020
EJNMMI Physics
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44Sc has been increasingly investigated as a potential alternative to 68Ga in the development of tracers for positron emission tomography (PET). ...
For image quality comparison, we calculated recovery coefficients in 1-5 mm rods and spillover ratios in either air, water, or bone-equivalent material (Teflon). ...
Background 68 Ga is the most commonly used isotope in metal-organic radiotracers for positron emission tomography (PET). ...
doi:10.1186/s40658-020-0286-3
pmid:32166581
pmcid:PMC7067939
fatcat:eeh7esglgjcqtil7nrmb7le2lu
A positron tomograph with 600 BGO crystals and 2.6 mm resolution
1988
IEEE Transactions on Nuclear Science
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A 0.3 mm diam 22 Na line source near the center of the tomograph has a circular point spread function (PSF) with a full-width at halfmaximum (fwhm) of 2.6 mm. ...
We describe the imaging performance of the Donner 600-Crystal Positron Tomograph, a single 60 cm diam ring of 3 mm wide bismuth germanate (BGO) crystals coupled individually to 14 mm phototubes. ...
\ref
Future Developments Usually in positron emission tomography, emission images can be taken only of sections that have been transmission scanned previously. ...
doi:10.1109/23.12807
fatcat:ldolx3li65corgwj2ryvz276d4
Direct positron emission imaging: ultra-fast timing enables reconstruction-free imaging
[article]
2021
arXiv
pre-print
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Positron emission tomography, like many other tomographic imaging modalities, relies on an image reconstruction step to produce cross-sectional images from projection data. ...
algorithms, permits recovery of the distribution of positron-emitting radionuclides. ...
Introduction: Three-dimensional biomedical imaging techniques including x-ray computed tomography (CT) single photon emission computed tomography (SPECT) and positron emission tomography (PET) measure ...
arXiv:2105.05805v1
fatcat:pudneaomfnecraajwdjgk5sxxu
Evaluation of a Positron-Emission-Tomography-based SiPM readout for Compact Segmented Neutron Imagers
[article]
2022
arXiv
pre-print
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recent developments of pulse-shape-sensitive plastic scintillators that offer excellent gamma-ray/neutron discrimination, and arrays of silicon photomultipliers combined with highly scalable and fast positron-emission-tomography ...
Gamma-ray emission from special nuclear material (SNM) is relatively easy to shield from detection using modest amounts of high-Z material. ...
parts used in this project. ...
arXiv:2202.07759v1
fatcat:l7vnmlmmnbervhr46iuf5uz4mq
Positron emission tomography: a review of basic principles, scanner design and performance, and current systems
2004
Seminars in nuclear medicine
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S INCE THE INCEPTION of positron emission tomography (PET) several decades ago, PET scanner design and performance have improved dramatically. ...
In addition, continuous, large-area detectors, such as those found in multi-head Anger camera systems and used for single-photon emission computed tomography (SPECT), have now been appropriately modified ...
Rod
Rod
Rod
Point
Point
Transmission energy
window
350-650
350-650
350-650
300-650
595-860
600-720
Whole-body scan length
195
195
195
170
168
198
*Adapted with permission. 16 ...
doi:10.1053/j.semnuclmed.2003.12.002
pmid:15031810
fatcat:d4mtd7x2frccpge5gsi3gmfl6i
Physical principles and technology of clinical PET imaging
2004
Annals of the Academy of Medicine, Singapore
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Such developments are subject to the constraints imposed by the physics of positron emission tomography (PET) and the main objectives in designing or improving PET scanners are to achieve high spatial ...
Molecular imaging with positron-emitting radionuclides is playing an increasingly important role in the diagnosis and staging of malignant disease and in monitoring response to therapy. ...
; Dr Thomas Beyer, University of Essen, for helping to pioneer the development of PET/CT; and Dr David Brasse, Institut de Recherches Subatomique, Strasbourg, France for the reconstructions presented in ...
pmid:15098626
fatcat:vheg4iwaezbbribosmczpr4hi4
Split gradient coils for simultaneous PET-MRI
2009
Magnetic Resonance in Medicine
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The coils have been constructed and tested in the hybrid positron emission tomography-MRI system and successfully used in simultaneous positron emission tomography-MRI experiments. ...
In one recently described scanner configuration for simultaneous positron emission tomography-MRI, the positron emission tomography detection scintillating crystals reside in an 80-mm gap between the 2 ...
The combination of positron emission tomography (PET) and MRI is highly desirable since the two techniques produce complementary data; PET allows the distribution of minute concentrations of positron-emitting ...
doi:10.1002/mrm.22143
pmid:19780167
pmcid:PMC4304006
fatcat:uscxp34irrggfddsbargwopjcm
Optimizing modelling in iterative image reconstruction for preclinical pinhole PET
2016
Physics in Medicine and Biology
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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. ...
deformations of small structures, together leading to 0.75 mm resolution PET images of a hot-rod Derenzo phantom. ...
Acknowledgements We thank Ruud Ramakers for performing the mouse scans shown in this paper. ...
doi:10.1088/0031-9155/61/10/3712
pmid:27082049
fatcat:tatnqmhm6jhqrdiior3cljqxyq
Assessment of a three-dimensional line-of-response probability density function system matrix for PET
2012
Physics in Medicine and Biology
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for objects of 4 mm radius or larger, and this advantage extended to smaller objects (e.g. 2 mm radius sphere, 0.6 mm radius hot-rods) at higher iteration numbers; and (2) with positron range and acollinearity ...
The LOR-PDFs of three coincidence signal emitting sources, (1) ideal positron emitter that emits perfect back-to-back γ rays (γ γ ) in air; (2) fluorine-18 ( 18 F) nuclide in water; and (3) oxygen-15 ( ...
Given the size of a high-resolution PET image and the number of LORs for today's emission tomography systems, on the order of 10 7 and 10 9 , respectively, the system matrix in its raw form is prohibitively ...
doi:10.1088/0031-9155/57/21/6827
pmid:23032702
pmcid:PMC3479643
fatcat:7mfq5vq5nbatrfohwxpwrojcqi
Fast Energy Dependent Scatter Correction for List-Mode PET Data
2021
Journal of Imaging
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Improvements in energy resolution of modern positron emission tomography (PET) detectors have created opportunities to implement energy-based scatter correction algorithms. ...
Here, we use the energy information of auxiliary windows to estimate the scatter component. ...
Introduction In positron emission tomography (PET), Compton scattering refers to a scenario in which one or both annihilation photons suffer a change in direction and energy when interacting with matter ...
doi:10.3390/jimaging7100199
pmid:34677285
pmcid:PMC8541469
fatcat:q5hqug2665hd7ag5nhaf37eqyy
Performance assessment of a NaI(Tl) gamma counter for PET applications with methods for improved quantitative accuracy and greater standardization
2015
EJNMMI Physics
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Although NaI(Tl) gamma counters play an important role in many quantitative positron emission tomography (PET) protocols, their calibration for positron-emitting samples has not been standardized across ...
(409-to 613-keV energy window). ...
Gamma counters are also widely used in conjunction with positron emission tomography (PET), typically in the research setting. ...
doi:10.1186/s40658-015-0114-3
pmid:26046011
pmcid:PMC4452125
fatcat:xuxywwl46feebhp2nrnyfpd5om
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