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NATURE OF RINGING ARTIFACTS IN SPECT RECONSTRUCTION AND THEIR REDUCTION BY THE USE OF SIDE INFORMATION
2007
2007 4th IEEE International Symposium on Biomedical Imaging: From Nano to Macro
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We further show that a new, regularized, penalized-likelihood algorithm based on ordered subsets and employing side information stabilizes the iterative procedure against the development of artifacts. ...
ML-EM iterative reconstruction algorithms tend towards ringing artifacts, and high noise, after a large number of iterations just as filtered backprojection algorithms tend toward streak artifacts. ...
Other than the attenuation map, side information has also been used in edge-preserving SPECT reconstructions and SPECT-CT fusions. ...
doi:10.1109/isbi.2007.356818
dblp:conf/isbi/LiK07
fatcat:u7hcf24w4fbc3erf2uu7443ldy
Recent Advances in Hybrid Molecular Imaging Systems
2014
Seminars in Musculoskeletal Radiology
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This work was supported by grants 10030030, HI13C-0163-020013, and 2013013175 from the Ministry of Trade, Industry and Energy, the Ministry of Health and Welfare, and the NRF funded by the Ministry of ...
, Korea, for providing most of clinical images presented in this article. ...
Seminars in Musculoskeletal Radiology Vol. 18 No. 2/2014
Fig. 17 17 CT dose reduction by use of iterative reconstruction. ...
doi:10.1055/s-0034-1371014
pmid:24715444
fatcat:3i63hxycorf4vnb4jylbj2fo5q
Technical Pitfalls and Limitations of SPECT/CT
2015
Seminars in nuclear medicine
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If citing, it is advised that you check and use the publisher's definitive version for pagination, volume/issue, and date of publication details. ...
And where the final published version is provided on the Research Portal, if citing you are again advised to check the publisher's website for any subsequent corrections. ...
The effect of motion on the final image depends on the degree and nature of motion and can result in blurring of features especially visible in focal areas of uptake. ...
doi:10.1053/j.semnuclmed.2015.06.002
pmid:26522394
fatcat:gb7wn4twjrbw7fl6ivq3qkrxem
Partitioned Image Filtering for Reduction of the Gibbs Phenomenon
2009
Journal of Nuclear Medicine Technology
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The method has also been applied to 2 SPECT patient studies to show the effectiveness of the proposed filtering method, which can significantly reduce the Gibbs artifacts. ...
Conclusion: The Gibbs phenomenon in a filtered image can be reduced by partitioning the image so that the amplitude of the discontinuity is controlled. ...
Chuanyong Bai of Digirad Corp. for providing us clinical images. ...
doi:10.2967/jnmt.108.061556
pmid:19447854
pmcid:PMC5292232
fatcat:gityku236bckthpoqttzmi2fxe
Advances in Preclinical SPECT Instrumentation
2012
Journal of Nuclear Medicine
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Preclinical SPECT of rodents is both in demand and very demanding. ...
The need for high spatial resolution in combination with good sensitivity has given rise to considerable innovation in the areas of detectors, collimation, acquisition geometry, and image reconstruction ...
ACKNOWLEDGMENTS This work was supported in part by NIH grants R33EB00776, R01EB013677, and K99EB009106 and by Department of Energy grant DE-SC0002437. ...
doi:10.2967/jnumed.111.099853
pmid:22586145
pmcid:PMC3422073
fatcat:ednfytdbxrcpflm7xv53l75dai
Myocardial perfusion and function: Single photon emission computed tomography
2007
Journal of Nuclear Cardiology
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artifacts due to breast and/or excessive lateral chest-wall fat, due to the shift in position of the attenuating structures that occurs in the prone position. ...
In some laboratories the advantages of prone imaging in clarifying artifactual defects has led to a routine use of the combination of supine followed by prone acquisitions. 3 It appears that prone imaging ...
Acknowledgment We acknowledge the excellent editorial assistance of Patricia Upchurch, Director of Quality Assurance, American Society of Nuclear Cardiology. ...
doi:10.1016/j.nuclcard.2007.09.023
pmid:18022099
fatcat:xi7szsaqsjdsth5rxcmyackd3a
The clinical utilities of multi-pinhole single photon emission computed tomography
2020
Quantitative Imaging in Medicine and Surgery
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Besides the very successful application in small animal imaging, there has been a resurgence of the use of MPH collimators for clinical cardiac and brain studies, as well as other small field-of-view applications ...
This article reviews the basic principles of MPH collimators and introduces currently available and proposed clinical MPH SPECT systems. ...
Two groups of five detectors are tilted and positioned on each side of the nine detectors in the main row. ...
doi:10.21037/qims-19-1036
pmid:33014732
pmcid:PMC7495312
fatcat:eeeyhjpipzamtg3vzu4prqeq74
Emission Tomography
[chapter]
2018
Lecture Notes in Computer Science
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Although X-rays produced by bombarding targets with electrons had been in use since their discovery by Röntgen in 1895, the use of naturally decaying radioisotopes for medical imaging did not occur until ...
This is exploited for imaging purposes by using a ring detector and looking for coincidences in the observed data. ...
doi:10.1007/978-3-319-96520-8_10
fatcat:7jijidzs2ncjxamcjggpcm3vgq
Recent advances in cardiac SPECT instrumentation and imaging methods
2019
Physics in Medicine and Biology
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While conventional dual-head SPECT scanners using parallel-hole collimators and scintillation crystals with photomultiplier tubes are still the workhorse of cardiac SPECT, they have the limitations of ...
In this article, we review the recent advances in cardiac SPECT instrumentation and imaging methods. ...
Acknowledgment This work is supported by an internal funding from the Department of Radiology and Biomedical Imaging at Yale University, and NIH grant R01HL123949. ...
doi:10.1088/1361-6560/ab04de
pmid:30726779
fatcat:dlanwzmuvfh47cix3s6opaxreq
Small-Animal Molecular Imaging Methods
2010
Journal of Nuclear Medicine
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Micro-SPECT has been improved through the use of coded aperture imaging approaches as well as image reconstruction algorithms that can better deal with the photon-limited scan data. ...
Methods: Imaging methods based on electromagnetic radiation, such as PET, SPECT, MRI, and CT, are increasingly applicable because of recent advances in novel scanner hardware and image reconstruction software ...
However, the use of scattered x-rays as the basis for CT has the potential to provide information about specific molecules by virtue of differences in the spacing and nature of the chemical bonds in naturally ...
doi:10.2967/jnumed.109.068148
pmid:20457793
pmcid:PMC3968540
fatcat:jkv6gpyyvrh45plmfikyi4ulni
Post-reconstruction non-local means filtering methods using CT side information for quantitative SPECT
2013
Physics in Medicine and Biology
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Recently, NLM filtering methods have shown promising results for noise reduction. Moreover, NLM methods using high-quality side information can improve image quality further. ...
We studied four different ways of incorporating CT information in the NLM methods: two known (NLM CT-B and NLM CT-M) and two newly considered (NLM CT-S and NLM CT-H). ...
Acknowledgment This work was supported in part by NIH grant 2RO1 EB001994. The authors would like to thank Dr Kenneth F Koral for helpful comments that improved this paper. ...
doi:10.1088/0031-9155/58/17/6225
pmid:23956327
pmcid:PMC3821737
fatcat:nj65h556zfhfbgd6vtqc6y5bfq
Single Photon Emission Computed Tomography (SPECT) Myocardial Perfusion Imaging Guidelines: Instrumentation, Acquisition, Processing, and Interpretation
2018
Journal of Nuclear Cardiology
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side by side, with displays of the normal activity distribution(s) and their variance distribution available as required for comparison. ...
For example, if the patient has their right arm by their side, and it is either partially or fully truncated in the attenuation map, this will have no impact on the attenuation calculation, as no rays ...
doi:10.1007/s12350-018-1283-y
pmid:29802599
fatcat:tn6gmv6j3vdzhl2dhs22mxqhc4
Imaging in Nuclear Medicine
2016
Medical Physics (Lancaster)
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Acknowledgments The authors would like to thank Gernot Ebel for useful comments and suggestions during the preparation of this contribution. ...
Acknowledgments The author thanks Isabel Dregely, Ph.D. and Shelley Zhang, Ph.D., for assistance in the final preparation of the manuscript. ...
The birth and
Fig. 5.1 Reduction of the artifacts present around the bladder in non-TOF reconstruction. ...
doi:10.1118/1.4947510
pmid:27277065
fatcat:6l6n46bpinfv3eqawoejvjkp3i
MULTIMODALITY IN VIVO IMAGING SYSTEMS: Twice the Power or Double the Trouble?
2006
Annual Review of Biomedical Engineering
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This review discusses the advantages and challenges in developing multimodality imaging systems for in vivo use, highlights some successful combinations that are now routinely used in the clinic and in ...
system that incorporated an X-ray tube for the transmission component and had the explicit goal of producing high-quality structural information (7). ...
Describes how to use anatomic information from CT or MRI in the reconstruction of PET or SPECT images. 41. Gindi G, Lee M, Rangarajan A, Zubal IG. 1993. ...
doi:10.1146/annurev.bioeng.8.061505.095728
pmid:16834551
fatcat:txbkctpnenhgdfaoxczh7trzq4
Self-collimating SPECT with multi-layer interspaced mosaic detectors
2021
IEEE Transactions on Medical Imaging
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The unprecedented system performance demonstrated by these 3 SPECT scanners is a clear manifestation of the superiority of the self-collimating approach over conventional mechanical collimation. ...
To simultaneously achieve high resolution and sensitivity, we propose to use sensitive detectors constructed in a multi-layer interspaced mosaic detectors (MATRICES) architecture to accomplish part of ...
ACKNOWLEDGMENT This work uses the computational resources supported by Tsinghua National Laboratory for Information Science and Technology and Tsinghua High-performance Computing Center (THPCC). ...
doi:10.1109/tmi.2021.3073288
pmid:33852384
fatcat:cx6jz6p2jzgt7oysvcgvu476de
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