2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)最新文献_第4页

The minimum achievable timing resolution with high-aspect-ratio scintillation detectors for time-of-flight PET 用于飞行时间PET的高纵横比闪烁探测器的最小可实现定时分辨率

2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2014-11-01 DOI: 10.1109/NSSMIC.2014.7430913

J. Cates, R. Vinke, C. Levin

{"title":"The minimum achievable timing resolution with high-aspect-ratio scintillation detectors for time-of-flight PET","authors":"J. Cates, R. Vinke, C. Levin","doi":"10.1109/NSSMIC.2014.7430913","DOIUrl":"https://doi.org/10.1109/NSSMIC.2014.7430913","url":null,"abstract":"Clinically translatable scintillation detectors employ relatively long crystals (20-30 mm) for increased system sensitivity in whole-body PET. In these high-aspect ratio (HAR) crystals (long and narrow), the degradation in timing performance due to variance in the optical path length of scintillation light is non-negligible. In this work, an accurate, analytical probability density function (p.d.f.) for photon transit time was incorporated into a calculation of the Cramr-Rao Lower Bound (CRLB) on timing resolution to investigate the minimum achievable timing resolution for crystals with HAR geometries. The analytical p.d.f. was compared against light transport simulations and direct measurement of photon arrival time statistics using time-correlated single photon counting techniques (TCSPC), demonstrating consistency between the observed and theoretical distributions (χ2 p-value > 0.95). A coincidence timing resolution for two 3×3×20 mm3 LYSO:Ce scintillators coupled to MPPCs was measured to be 162 ps FWHM, approaching the statistically calculated limit of 152 ps within 6.5%. Parametric studies, where crystal and photosensor properties were varied, revealed that the increased optical transport spread in HAR crystals does not preclude an achievable coincidence timing resolution of 100 ps FWHM. The CRLB for various HAR scintillation detectors is presented, and instrumentation performance improvements necessary for achieving 100 ps FWHM coincidence timing resolution with HAR scintillators are discussed.","PeriodicalId":144711,"journal":{"name":"2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124967523","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: 1

A simple semi-empirical model for positron annihilation non-collinearity based on quadHIDAC measurements 基于quadHIDAC测量的正电子湮灭非共线性的简单半经验模型

2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2014-11-01 DOI: 10.1109/NSSMIC.2014.7430831

Don Vernekoh, K. Schafers, J. Wessels

{"title":"A simple semi-empirical model for positron annihilation non-collinearity based on quadHIDAC measurements","authors":"Don Vernekoh, K. Schafers, J. Wessels","doi":"10.1109/NSSMIC.2014.7430831","DOIUrl":"https://doi.org/10.1109/NSSMIC.2014.7430831","url":null,"abstract":"Positron annihilation non-collinearity is one physical factor that constraints the achievable spatial resolution in PET. The quadHIDAC is a high resolution small animal PET scanner with a unique detection principle, relying on multi-wire proportional chamber detectors. In a comparison of simulation and measurement of a 22Na point source, slight discrepancies are observed, which are addressed to an inappropriateness of the used non-collinearity model. Hence, a new simple model for non-collinearity is developed and adjusted to the observed data. It will be presented that the exclusive properties of the quadHIDAC, i.e., high 3D spatial resolution for single photon interactions measured on large radial offsets, offer a perfect environment to separate positron range and detector resolution influences from the measurements and simulations. This allows the investigation of the pure spatial resolution degradation induced by the annihilation non-collinearity of positron emitting sources. Furthermore, simulations, including the proposed non-collinearity implementation, for a possible improved HIDAC setup on an illustrative zebrafish emission model are performed, where associated reconstructed images for the different setups are compared.","PeriodicalId":144711,"journal":{"name":"2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129640345","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

The simulation of a multi energy bone mineral densitometry method 模拟一种多能骨密度测定方法

2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2014-11-01 DOI: 10.1109/NSSMIC.2014.7430918

Ruizhe Li, Liang Li, Zhiqiang Chen, Li Zhang

引用次数: 1

Enhanced data analysis for an imaging neutron/gamma-ray spectrometer 增强数据分析成像中子/伽马射线光谱仪

2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2014-11-01 DOI: 10.1109/NSSMIC.2014.7431110

A. Madden, P. Bloser, J. Legere, M. McConnell, J. Ryan

{"title":"Enhanced data analysis for an imaging neutron/gamma-ray spectrometer","authors":"A. Madden, P. Bloser, J. Legere, M. McConnell, J. Ryan","doi":"10.1109/NSSMIC.2014.7431110","DOIUrl":"https://doi.org/10.1109/NSSMIC.2014.7431110","url":null,"abstract":"The ability to detect the presence of radioactive sources and Special Nuclear Materials (SNM) is of extreme importance for homeland security efforts. Today, we face terrorist threats in the form of explosive nuclear devices and Radiation Dispersal Devices (RDDs). The ability to remotely locate and identify the materials used to create these devices is imperative in the interdiction of terrorist threats. The Neutron SPECTrometer (NSPECT) developed by Michigan Aerospace Corporation and the University of New Hampshire is a dual-species instrument that detects both neutrons and gamma rays emitted from SNM, and gamma rays emitted from radioactive material. NSPECT provides spectroscopic information on the radioactive and fissile sources present while simultaneously imaging the sources within the instrumental field of view for enhanced detection capabilities. Creation and application of a detailed instrument response function through numerical simulations, analytical descriptions, and real NSPECT data provides the most detailed information on the detected neutrons and gamma rays, thereby allowing for the most sensitive and reliable detection of nuclear and radioactive threats.","PeriodicalId":144711,"journal":{"name":"2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130653523","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

Design of a high speed online maximum likelihood positioning algorithm using FPGA 基于FPGA的高速在线最大似然定位算法的设计

2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2014-11-01 DOI: 10.1109/NSSMIC.2014.7430954

Xinyi Cheng, Yong Xiao, Yonggang Wang, Deng Li

引用次数: 1

Machine learning based parametric image estimation for Analyzer-based phase contrast imaging 基于机器学习的基于分析仪的相衬成像参数图像估计

2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2014-11-01 DOI: 10.1109/NSSMIC.2014.7430958

Oriol Caudevilla, J. Brankov

引用次数: 0

Real-time MPI-based software for processing of XPCS data 基于mpi的实时XPCS数据处理软件

2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2014-11-01 DOI: 10.1109/NSSMIC.2014.7431129

T. Madden, Sufeng Niu, S. Narayanan, A. Sandy, J. Weizeorick, P. Denes, J. Joseph, Victoria Moeller-Chan, D. Doering, P. McVittie

{"title":"Real-time MPI-based software for processing of XPCS data","authors":"T. Madden, Sufeng Niu, S. Narayanan, A. Sandy, J. Weizeorick, P. Denes, J. Joseph, Victoria Moeller-Chan, D. Doering, P. McVittie","doi":"10.1109/NSSMIC.2014.7431129","DOIUrl":"https://doi.org/10.1109/NSSMIC.2014.7431129","url":null,"abstract":"We describe a software library, called MPIFCCD, based on the Message Passing Interface (MPI) for real-time parallel computing on data continuously streamed from the Frame Store Fast Charge-Coupled Device (FSFCCD) Detector located at the Advanced Photon Source (APS) at Argonne National Laboratory. The FSFCCD is used to collect data for X-ray Photon Correlation Spectroscopy (XPCS) experiments at Sector 8-ID at APS. MPIFCCD is integrated into another software package called CINController, developed at APS and Lawrence Berkeley National Laboratory to serve as a QT-based user interface for control and data collection from the FSFCCD. Real-time calculations performed by MPIFCCD include dark image integration and subtraction, noise image integration, image descrambling, and lower-level discrimination. MPIFCCD allows for continuous real-time data collection of FSFCCD data at image rates of 100 frames- per-second (fps) for 1 mega-pixel images and 1000fps for 10 kilo-pixel images. In the future, more complex computations will be implemented in real time with MPIFCCD.","PeriodicalId":144711,"journal":{"name":"2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116516082","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: 1

Characterization of a NTD Double-Sided Silicon Strip Detector using a pulsed ion beam 用脉冲离子束表征NTD双面硅条探测器

2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2014-11-01 DOI: 10.1109/NSSMIC.2014.7431094

A. Castoldi, C. Guazzoni, T. Parsani, F. Riccio, L. Carraresi, F. Taccetti, L. Acosta, I. Martel, J. Dueñas

引用次数: 1

Development of electromagnetic calorimeter using GSO and LYSO crystals for the J-PARC muon-to-electron conversion search experiment 用GSO和LYSO晶体研制用于J-PARC介子-电子转换搜索实验的电磁量热计

2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2014-11-01 DOI: 10.1109/NSSMIC.2014.7431243

K. Oishi

引用次数: 5

Relationship between Ca2+ concentration and the properties of codoped GGAG:Ce scintillators Ca2+浓度与共掺杂GGAG:Ce闪烁体性能的关系

2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2014-11-01 DOI: 10.1109/NSSMIC.2014.7431229

Fang Meng, M. Koschan, Yuntao Wu, C. Melcher, P. Cohen

引用次数: 0