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Jia Li, Kenneth Koral
2007 2007 4th IEEE International Symposium on Biomedical Imaging: From Nano to Macro  
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

Joong Kim, Jae Lee
2014 Seminars in Musculoskeletal Radiology  
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

Lefteris Livieratos
2015 Seminars in nuclear medicine  
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

G. L. Zeng, R. J. Allred
2009 Journal of Nuclear Medicine Technology  
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

T. E. Peterson, S. Shokouhi
2012 Journal of Nuclear Medicine  
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  
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

Ilker Ozsahin, Ling Chen, Arda Könik, Michael A. King, Freek J. Beekman, Greta S. P. Mok
2020 Quantitative Imaging in Medicine and Surgery  
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]

James Sanders
2018 Lecture Notes in Computer Science  
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

Jing Wu, Chi Liu
2019 Physics in Medicine and Biology  
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

R. A. de Kemp, F. H. Epstein, C. Catana, B. M. W. Tsui, E. L. Ritman
2010 Journal of Nuclear Medicine  
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

Se Young Chun, Jeffrey A Fessler, Yuni K Dewaraja
2013 Physics in Medicine and Biology  
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

Sharmila Dorbala, Karthik Ananthasubramaniam, Ian S. Armstrong, Panithaya Chareonthaitawee, E. Gordon DePuey, Andrew J. Einstein, Robert J. Gropler, Thomas A. Holly, John J. Mahmarian, Mi-Ae Park, Donna M. Polk, Raymond Russell (+3 others)
2018 Journal of Nuclear Cardiology  
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

Matthew Palmer
2016 Medical Physics (Lancaster)  
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?

Simon R. Cherry
2006 Annual Review of Biomedical Engineering  
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

Tianyu Ma, Qingyang Wei, Zhenlei Lyu, Debin Zhang, Hongyang Zhanga, Rui Wang, Jiahong Dong, Yaqiang Liu, Rutao Yao, Zuo-Xiang He
2021 IEEE Transactions on Medical Imaging  
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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