1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255)最新文献_第2页

An LSO BLOCK detector for PET using an avalanche photodiode array 使用雪崩光电二极管阵列的PET的LSO块检测器

1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255) Pub Date : 1998-11-08 DOI: 10.1109/NSSMIC.1998.774356

M. Casey, H. Dautet, D. Waechter, R. Lecomte, L. Eriksson, M. Schmand

引用次数: 13

A large associative memory system for the CDF level 2 trigger 大型关联记忆系统用于CDF 2级触发器

1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255) Pub Date : 1998-11-08 DOI: 10.1109/NSSMIC.1998.775151

A. Bardi, S. Belforte, A. Cerri, M. Dell'Orso, S. Donati, S. Galeotti, P. Giannetti, E. Meschi, F. Morsani, G. Punzi, L. Ristori, F. Spinella

引用次数: 6

Investigation of 90/spl deg/ dual-detector half-fanbeam collimation for myocardial SPECT imaging 90/声压度/双探测器半扇束准直心肌SPECT成像的研究

1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255) Pub Date : 1998-11-08 DOI: 10.1109/NSSMIC.1998.774372

K. LaCroix, B. Tsui

{"title":"Investigation of 90/spl deg/ dual-detector half-fanbeam collimation for myocardial SPECT imaging","authors":"K. LaCroix, B. Tsui","doi":"10.1109/NSSMIC.1998.774372","DOIUrl":"https://doi.org/10.1109/NSSMIC.1998.774372","url":null,"abstract":"This study investigated the use of half-fanbeam collimation with a 90/spl deg/ dual-detector system for myocardial SPECT imaging. The detection efficiency as a function of focal length was evaluated to determine if an optimal focal length exists. Second, sinograms were constructed and a simulation study was performed to determine if there is an optimal camera rotation which maximizes the total acquired myocardial counts while providing sufficient angular sampling for the myocardial region. Finally, image artifacts for various camera rotations were evaluated using simulated and experimental data. There exists an optimal collimator focal length for a given ROR; it varies with ROR. Relative to parallel collimation, the detection efficiency for half-fanbeam collimation is roughly 20% greater, for the same spatial resolution. The theoretical minimum camera rotation for complete sampling of the myocardial region ranges from 123/spl deg/ to 145/spl deg/ for RORs ranging from 13 to 25 cm, respectively. The total number of acquired myocardial counts is relatively constant for camera rotations of 135/spl deg/ to 360/spl deg/. Myocardial SPECT images reconstructed iteratively with attenuation compensation from half-fanbeam data collected over camera rotations ranging from 135/spl deg/ to 360/spl deg/ showed no artifacts in the myocardial region. We conclude that a camera rotation of 180/spl deg/ centered at 45/spl deg/ left anterior oblique is a good, practical minimum rotation. Half-fanbeam collimation is a strong alternative system configuration for myocardial SPECT.","PeriodicalId":129202,"journal":{"name":"1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117304484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

"ANIPET" a versatile PET scanner for imaging small animals “ANIPET”是一种多功能PET扫描仪，用于小动物成像

1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255) Pub Date : 1998-11-08 DOI: 10.1109/NSSMIC.1998.774387

Christopher J. Thompson, P. Sciascia, K. Murthy, S. Kecani, I. Nikkinen, E. D. Campo, J. Corbett, Y. Bercier, M. Diksic, P. Cumming

{"title":"\"ANIPET\" a versatile PET scanner for imaging small animals","authors":"Christopher J. Thompson, P. Sciascia, K. Murthy, S. Kecani, I. Nikkinen, E. D. Campo, J. Corbett, Y. Bercier, M. Diksic, P. Cumming","doi":"10.1109/NSSMIC.1998.774387","DOIUrl":"https://doi.org/10.1109/NSSMIC.1998.774387","url":null,"abstract":"The authors are presently constructing \"ANIPET\", a new high spatial resolution PET scanner for imaging small animals. This instrument will be used to investigate new tracers and as a substitute for autoradiography. The instrument uses two pixellated BGO crystal arrays coupled to position-sensitive PMTs. Animals can be imaged in two modes. One is similar to a \"whole-body\" PET scan in which the detectors are stationary and the animal support couch moves longitudinally between the detectors. This mode is used for initial characterization of the bio-distribution of new tracers. In the second mode the animal support is first rotated through 90/spl deg/ in the horizontal plane, allowing the detectors to rotate about the animal's head. This mode resembles a conventional 3-D PET scan using a partial detector ring. Fully reconstructed quantitative images can be obtained. Continuous motion of either the bed, or detectors (via computer-controlled translation stages), and list-mode data collection are used. The field of view is 65 mm (lateral) by 55 mm (axial). To image larger species, the detectors can be offset by up to 25 mm allowing the lateral FOV to extend to 90 mm.","PeriodicalId":129202,"journal":{"name":"1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129524835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

Rapid 3D cone-beam reconstruction with the Algebraic Reconstruction Technique (ART) by utilizing texture mapping graphics hardware 利用纹理映射图形硬件的代数重建技术(ART)快速三维锥形梁重建

1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255) Pub Date : 1998-11-08 DOI: 10.1109/NSSMIC.1998.773839

Klaus Mueller, R. Yagel

引用次数: 9

Design and experimental validation of a quantitative myocardial /sup 201/Tl SPECT system 心肌/sup 201/Tl SPECT定量系统的设计与实验验证

1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255) Pub Date : 1998-11-08 DOI: 10.1109/NSSMIC.1998.773914

H. Iida, Y. Shoji, S. Sugawara, T. Kinoshita, Y. Tamura, Y. Narita, S. Eberl

{"title":"Design and experimental validation of a quantitative myocardial /sup 201/Tl SPECT system","authors":"H. Iida, Y. Shoji, S. Sugawara, T. Kinoshita, Y. Tamura, Y. Narita, S. Eberl","doi":"10.1109/NSSMIC.1998.773914","DOIUrl":"https://doi.org/10.1109/NSSMIC.1998.773914","url":null,"abstract":"We have developed a quantitative SPECT system, and evaluated its potential for quantitative assessment of bio-physiological functions in the myocardium particularly with /sup 201/Tl. Our approach included development of a transmission system that provides accurate attenuation /spl mu/ maps, and implementation of ordered-subset EM reconstruction with transmission data based attenuation correction in addition to scatter correction using the transmission-dependent convolution subtraction (TDCS) technique. The transmission system was designed using Monte Carlo simulation to minimize the scatter in the transmission projection data while keeping loss of sensitivity minimal, and was attached to an opposing 2-head gamma camera fitted with parallel beam collimators. Observed /spl mu/ values agreed quantitatively well with the theoretical expected values in both phantoms and human thorax. Phantom experiments with /sup 201/Tl also demonstrated that, with both corrections for attenuation and scatter, observed images were directly proportional to the actual radioactivity distribution for various phantom geometries. Attenuation correction without scatter correction improved images in deep structure, but resulted in significant artifacts in the chest phantom in addition to dependency of observed radioactivity concentrations on the diameter of cylindrical phantoms. Absolute quantitation of bio-physiological functions, which is well established in PET, is shown to be feasible using SPECT, if both quantitative attenuation and scatter corrections are employed.","PeriodicalId":129202,"journal":{"name":"1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255)","volume":"1667 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129337799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

The form of X-ray photoelectron tracks in a capillary gas proportional counter 毛细管气体比例计数器中x射线光电子径迹的形式

1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255) Pub Date : 1998-11-08 DOI: 10.1109/NSSMIC.1998.775134

H. Sakurai, S. Saito, T. Masuda, S. Gunji, M. Noma, G. Kanase, Y. Suzuki

引用次数: 15

Regularization parameter selection for Bayesian reconstruction of attenuation map 衰减图贝叶斯重构的正则化参数选择

1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255) Pub Date : 1998-11-08 DOI: 10.1109/NSSMIC.1998.773847

V. Panin, G. L. Zeng, G. Gullberg

引用次数: 9

Response of silicon semiconductor detector to low-energy ions 硅半导体探测器对低能离子的响应

1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255) Pub Date : 1998-11-08 DOI: 10.1109/NSSMIC.1998.774287

F. Sato, T. Tanaka, T. Iida

引用次数: 0

Cardiac gating of transmission data is unnecessary for attenuation compensation of double-gated emission scans 传输数据的心门控对双门控发射扫描的衰减补偿是不必要的

1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255) Pub Date : 1998-11-08 DOI: 10.1109/NSSMIC.1998.773929

G. Klein, B. Reutter, R. Huesman, T. Budinger

{"title":"Cardiac gating of transmission data is unnecessary for attenuation compensation of double-gated emission scans","authors":"G. Klein, B. Reutter, R. Huesman, T. Budinger","doi":"10.1109/NSSMIC.1998.773929","DOIUrl":"https://doi.org/10.1109/NSSMIC.1998.773929","url":null,"abstract":"Respiratory motion produces differences in PET attenuation maps from different phases of a respiratory-gated cardiac transmission acquisition. The effect of the contraction of the heart on the attenuation map is assumed to be small, but has not yet been investigated. The authors acquired list mode transmission data from two normally breathing humans while monitoring both respiration and the cardiac waveform. The data were retrospectively analyzed; first dividing them into separate time frames to check for gross patient motion, then into respiratory frames to isolate respiratory motion. A large, nearly motionless respiratory dataset is available near end expiration. These data were divided into 100 msec cardiac frames and reconstructed. Though up to 20 mm of respiratory motion was seen in the attenuation map, no discernible motion was detected between cardiac frames. The authors' finding implies that cardiac gating of the PET transmission map is unnecessary, and that only compensation for respiratory motion need be considered when correcting double-gated emission data for attenuation effects.","PeriodicalId":129202,"journal":{"name":"1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126668312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5