1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255)最新文献_第5页

Clinical evaluation of single-photon attenuation correction for 3D whole-body PET 三维全身PET单光子衰减校正的临床评价

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.1998.773867

C. Watson, A. Schaefer, W. K. Luk, C. Kirsch

引用次数: 35

Performance of the electronics for the Sudbury Neutrino Observatory 萨德伯里中微子天文台的电子性能

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.1998.774309

E. Beier, D. Cowen, P. Keener, J. Klein, F. Newcomer, D. McDonald, M. Neubauer, R. Van Berg, R. G. Van de Water, P. Wittich

引用次数: 1

Measurement of dose rate dependence of radiation induced damage to the current gain in bipolar transistors 双极晶体管辐射损伤对电流增益的剂量率依赖性测量

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.1998.775155

D. Dorfan, T. Dubbs, A. Grillo, W. Rowe, H. Sadrozinski, A. Seiden, E. Spencer, S. Stromberg, R. Wichmann, N. Ipe, S. Mao

引用次数: 9

Theoretical determination of the collimator geometrical transfer function for the reconstruction of SPECT data SPECT数据重建准直器几何传递函数的理论确定

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.1998.771649

A. Formiconi, A. Passeri, P. Calvini

引用次数: 12

A study of possible causes of artifactual decreases in the left ventricular apex with SPECT cardiac perfusion imaging SPECT心脏灌注显像对左心室心尖人为减少的可能原因的研究

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.1998.773868

P. H. Pretorius, Matt A. King

{"title":"A study of possible causes of artifactual decreases in the left ventricular apex with SPECT cardiac perfusion imaging","authors":"P. H. Pretorius, Matt A. King","doi":"10.1109/NSSMIC.1998.773868","DOIUrl":"https://doi.org/10.1109/NSSMIC.1998.773868","url":null,"abstract":"The objectives of this investigation were to determine the impact on apparent localization in the apex of the LV of cardiac and respiratory motion, extra-cardiac uptake, the anisotropic spatial resolution associated with imaging, and apical thinning. The ability of attenuation compensation (AC), and of combined attenuation and spatial resolution correction (ARC) to alter the impact of these factors on apparent apex counts was also investigated. The MCAT phantom was used to simulate cardiac gated radionuclide perfusion imaging both with and without apical thinning of the left ventricular wall. Simple respiratory motion of the structures of the chest was included in the simulation. After reconstruction using the maximum likelihood ordered subset expectation maximization (OSEM) algorithm with no correction for physical degradation (NC), with AC, and with ARC, polar maps were generated. Results show that cardiac motion had no impact on apex counts other than the absolute values increasing linearly as the myocardium thickens. Respiratory motion of a magnitude similar to that observed clinically does not influence the apex, but does have some effect on adjacent regions. A small decrease in apical counts was observed with body-contouring as opposed to imaging with a circular camera orbit. Counts in the apex varied greatly with extent of the thinning. AC increased the visibility of the apparent decrease in apical counts over NC with apical thinning, as did ARC over AC.","PeriodicalId":129202,"journal":{"name":"1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255)","volume":"272 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":"124401166","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: 18

Development of high gain GEM detectors 高增益GEM探测器的研制

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.1998.774814

A. Bressan, L. Ropelewski, F. Sauli, D. Morman

引用次数: 3

Automatic pole-zero/zero-pole digital compensator for high-resolution spectroscopy: design and experiments 用于高分辨率光谱的自动零极/零极数字补偿器:设计和实验

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.1998.774313

Angelo Geraci, A. Pullia, G. Ripamonti

{"title":"Automatic pole-zero/zero-pole digital compensator for high-resolution spectroscopy: design and experiments","authors":"Angelo Geraci, A. Pullia, G. Ripamonti","doi":"10.1109/NSSMIC.1998.774313","DOIUrl":"https://doi.org/10.1109/NSSMIC.1998.774313","url":null,"abstract":"In a high-resolution spectroscopy system the relatively long exponential decay due to the charge preamplifier is customarily canceled in an analogue fashion by means of a PZ (pole-zero) stage. The accurateness of such a compensation has a big impact on the energy resolution because it strongly affects the baseline-stability problems. Automatic methods operating in the analogue domain are used but they require mechanical adjustment of trimmers, which is bulky and not adequate in experiments with many measurement channels. We have automatically and on-line performed such a compensation in a digital way, while maintaining a spectroscopy performance and keeping at minimum both the ADC sampling frequency (thus power consumption) and its resolution (thus cost). This is done through an IIR filter, implemented within a FPGA by a DSP. The so-compensated waveform has, in excellent approximation, an all-pole shape. Starting from such a signal, the minimum-noise filters for energy and/or time measurements are then promptly synthesized and implemented for real time operation through the same DSP.","PeriodicalId":129202,"journal":{"name":"1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255)","volume":"1 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":"117008096","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: 13

Simulations and preliminary results from the SIFTER (scintillating fiber telescope for energetic radiation) beam test apparatus 高能辐射闪烁光纤望远镜(SIFTER)光束测试装置的模拟与初步结果

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.1998.775234

R. Kippen, G. Pendleton, R. Mallozzi, G. Richardson, P. Hink, W. Binns, M. Israel, K. Rielage, J. Buckley, G. Fishman, T. Parnell, M. Christl, R. Wilson, T. Koshut

{"title":"Simulations and preliminary results from the SIFTER (scintillating fiber telescope for energetic radiation) beam test apparatus","authors":"R. Kippen, G. Pendleton, R. Mallozzi, G. Richardson, P. Hink, W. Binns, M. Israel, K. Rielage, J. Buckley, G. Fishman, T. Parnell, M. Christl, R. Wilson, T. Koshut","doi":"10.1109/NSSMIC.1998.775234","DOIUrl":"https://doi.org/10.1109/NSSMIC.1998.775234","url":null,"abstract":"The Scintillating Fiber Telescope for Energetic Radiation (SIFTER) is a large-area instrument concept for high-energy (E>10 MeV) gamma-ray astronomy. It takes advantage of the technology of fine (/spl sim/1 mm/sup 2/) plastic scintillating fibers in the context of a pair tracker/calorimeter telescope. In our on-going SIFTER research, we have developed a small test apparatus, consisting of 12 fiber planes, each with a potential active area of 10 cm/spl times/10 cm covered with a thin tantalum foil converter. This apparatus has been tested with high-energy photons (/spl sim/0.5-1.6 GeV) at the Thomas Jefferson National Accelerator Laboratory Hall B tagged gamma-ray facility. We report on the preliminary beam test results, concentrating on comparisons with detailed Monte Carlo simulations of the instrument performance, including track reconstruction, angular resolution and detection efficiency.","PeriodicalId":129202,"journal":{"name":"1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255)","volume":"27 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":"123607828","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: 0

Data acquisition, processing and control for the SYRMEP/FRONTRAD experiment symep /FRONTRAD实验的数据采集、处理和控制

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.1998.775158

F. Arfelli, V. Bonvicini, A. Bravin, G. Cantatore, E. Castelli, M. Fabrizioli, R. Longo, A. Olivo, S. Pani, D. Pontoni, P. Poropat, M. Prest, A. Rashevsky, L. Rigon, G. Tromba, A. Vacchi, E. Vallazza

{"title":"Data acquisition, processing and control for the SYRMEP/FRONTRAD experiment","authors":"F. Arfelli, V. Bonvicini, A. Bravin, G. Cantatore, E. Castelli, M. Fabrizioli, R. Longo, A. Olivo, S. Pani, D. Pontoni, P. Poropat, M. Prest, A. Rashevsky, L. Rigon, G. Tromba, A. Vacchi, E. Vallazza","doi":"10.1109/NSSMIC.1998.775158","DOIUrl":"https://doi.org/10.1109/NSSMIC.1998.775158","url":null,"abstract":"The SYRMEP/FRONTRAD experiment is performing a R&D program in order to assess the performances of a scanning X-ray detector operating at the ELETTRA Synchrotron light source, in an energy range optimized for mammographic imaging. The detector itself consists of a stack of silicon detectors positioned edge-on with respect to the X-ray beam direction. The data acquisition system must perform several tasks: from the control of the motors during the scanning procedure, to the collection of the data that are recorded on CAMAC modules and refer to the slots of the image while it is forming. The system has to process the data during the scan and to store them on a local disk. In addition, the environmental conditions (global dose measured by an ionization chamber, temperature, dark current of the detector and status of the electronics power supplies) have to be monitored and the proper action taken. We have implemented a multiprocessing system using TCP/IP and RPC to manage the tasks. The overall control is done by a GUI built using the Tcl/Tk package.","PeriodicalId":129202,"journal":{"name":"1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255)","volume":"37 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":"123958056","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: 0

Development of a 3D position sensitive scintillation detector using neural networks 基于神经网络的三维位置敏感闪烁探测器的研制

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.1998.773818

D. Clement, R. Frei, J. Loude, C. Morel

引用次数: 41