1995 IEEE Nuclear Science Symposium and Medical Imaging Conference Record最新文献_第5页

Evaluation of silicon micro strip detectors with large read-out pitch 大读出节距硅微带探测器的评价

1995 IEEE Nuclear Science Symposium and Medical Imaging Conference Record Pub Date : 1995-10-21 DOI: 10.1109/NSSMIC.1995.504279

M. Hazumi, T. Kawasaki, K. Senyo, Y. Nagashima, K. Yamamoto, K. Yamamura, T. Tsuboyama, J. Haba, H. Ikeda, H. Iwasaki, T. Matsuda, H. Ozaki, M. Tanaka, Y. Yamada, S. Okuno, S. Avrillon, Y. Asano, S. Mori, C. Fukunaga, T. Hirose, H. Miyata, K. Miyano, E. Banas, A. Bozek, Z. Natkaniec, H. Palka, M. Różańska, K. Rybicki

引用次数: 3

A comparison of WLS and LS reconstruction for PET PET的WLS与LS重建比较

1995 IEEE Nuclear Science Symposium and Medical Imaging Conference Record Pub Date : 1995-10-21 DOI: 10.1109/NSSMIC.1995.510485

G. Chinn, S. Huang

引用次数: 1

Parallel readout of a photodiode array in a scintillating fibre calorimeter 闪烁光纤量热计中光电二极管阵列的并行读出

1995 IEEE Nuclear Science Symposium and Medical Imaging Conference Record Pub Date : 1995-10-21 DOI: 10.1109/NSSMIC.1995.504325

M. Keller, A. Stellberger, K. Meier, K. Schmitt, A. Holscher

引用次数: 0

Design study simulations of a Compton camera for radioactive waste container imaging 用于放射性废物容器成像的康普顿相机的设计研究模拟

1995 IEEE Nuclear Science Symposium and Medical Imaging Conference Record Pub Date : 1995-10-21 DOI: 10.1109/NSSMIC.1995.510401

J. McKisson, D. Henderson, K.E. Neelands, P. Haskins

引用次数: 1

A weighted least-squares method for PET PET的加权最小二乘法

1995 IEEE Nuclear Science Symposium and Medical Imaging Conference Record Pub Date : 1995-10-21 DOI: 10.1109/NSSMIC.1995.510495

J. Anderson, B. Mair, Murali Rao, C.-H. Wu

引用次数: 8

Improved axial resolution in 2D PET with 3D reconstruction 通过三维重建提高了二维PET的轴向分辨率

1995 IEEE Nuclear Science Symposium and Medical Imaging Conference Record Pub Date : 1995-10-21 DOI: 10.1109/NSSMIC.1995.510490

K. Erlandsson, S. Strand

引用次数: 2

A Gamma Camera Probe with Hybrid Photodiode Readout 带有混合光电二极管读出的伽马照相机探头

1995 IEEE Nuclear Science Symposium and Medical Imaging Conference Record Pub Date : 1995-10-21 DOI: 10.1109/NSSMIC.1995.501935

P. Durrant, A. Truman, C. Datema, D. Ramsden

引用次数: 2

Image segmentation using circularly spread MR images 利用循环扩散的MR图像分割

1995 IEEE Nuclear Science Symposium and Medical Imaging Conference Record Pub Date : 1995-10-21 DOI: 10.1109/NSSMIC.1995.500309

T. Ono, K. Ogawa

引用次数: 0

Methods for the correction of vascular artifacts in PET O-15 water brain mapping studies PET O-15水脑成像中血管伪影的校正方法

1995 IEEE Nuclear Science Symposium and Medical Imaging Conference Record Pub Date : 1995-10-21 DOI: 10.1109/NSSMIC.1995.510498

Kewei Chen, E. Reiman, M. Lawson, L. Yun, D. Bandy, Anita Palant

{"title":"Methods for the correction of vascular artifacts in PET O-15 water brain mapping studies","authors":"Kewei Chen, E. Reiman, M. Lawson, L. Yun, D. Bandy, Anita Palant","doi":"10.1109/NSSMIC.1995.510498","DOIUrl":"https://doi.org/10.1109/NSSMIC.1995.510498","url":null,"abstract":"While positron emission tomographic (PET) measurements of regional cerebral blood flow (CBF) can be used to map regions of the brain that are involved in normal and pathological human behaviors, measurements in the anteromedial temporal lobe can be confounded by the combined effects of radiotracer activity in neighboring arteries and partial volume averaging. The authors now describe two alternative methods for addressing this potential confound. One method utilizes the early frames of a dynamic PET study, while the other method utilizes a coregistered magnetic resonance image (MRI) to characterize the vascular region-of-interest (ROI). Both methods subsequently assign a common value to each pixel in the vascular ROI. To simulate the vascular artifact, four dynamically acquired PET, O-15 water scans in the same subject during the same behavioral state were used to compute 4 vascular images (0-60 s after radiotracer administration) which included vascular activity and 4 control images (20-80 s after radiotracer administration) which did not. t-score maps were used to characterize regional blood flow differences related to vascular activity before and after the application of each vascular artifact-correction method. Both methods eliminated the observed differences in vascular activity, as well as the vascular artifact observed in the anteromedial temporal lobes.","PeriodicalId":409998,"journal":{"name":"1995 IEEE Nuclear Science Symposium and Medical Imaging Conference Record","volume":"2 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116861937","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

OPTIMIZING LIGHT COLLECTION FROM THIN SCINTILLATORS USED IN A BETA-RAY CAMERA FOR SURGICAL USE 优化外科用β射线相机中使用的薄闪烁体的光收集

1995 IEEE Nuclear Science Symposium and Medical Imaging Conference Record Pub Date : 1995-10-21 DOI: 10.1109/NSSMIC.1995.501933

Craig S. Levin, L. R. MacDonald, M. Tornai, Edward J. Hoffman, J. Park

{"title":"OPTIMIZING LIGHT COLLECTION FROM THIN SCINTILLATORS USED IN A BETA-RAY CAMERA FOR SURGICAL USE","authors":"Craig S. Levin, L. R. MacDonald, M. Tornai, Edward J. Hoffman, J. Park","doi":"10.1109/NSSMIC.1995.501933","DOIUrl":"https://doi.org/10.1109/NSSMIC.1995.501933","url":null,"abstract":"The authors are developing a 1-2 cm/sup 2/ area camera for imaging the distribution of beta-emitting radiopharmaceuticals at the surface of tissue exposed during surgery. The front end consists of a very thin continuous or segmented scintillator sensitive to betas (positrons or electrons) of a few hundred keV, yet insensitive to gamma rays. The light from the scintillator is piped through clear fibers to the photon detector (PD). This approach requires that a sufficient number of scintillation photons be transported from the scintillator, through the fibers to the PD. The scintillator, reflector, surface treatments, geometry, fiber light guides, and optical couplings must be optimized. The authors report here on efforts made to optimize the light collection from <3 mm thick plastic and CaF/sub 2/(Eu) scintillators into clear fibers using experimental measurements and computer simulations. The authors measured that with a 1.25 cm diameter, 0.5 mm thick optimized CaF/sub 2/(Eu) disk coupled to a 5 cm long bundle of clear optical fibers, on average, /spl sim/250 photoelectrons are produced at a PMT photocathode for a /sup 204/Tl beta flood source (E/sub max/=763 keV). This corresponds to a sufficient number of photoelectrons for <1 mm resolution imaging capabilities for the proposed camera.","PeriodicalId":409998,"journal":{"name":"1995 IEEE Nuclear Science Symposium and Medical Imaging Conference Record","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117186917","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: 27