1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255)最新文献_第3页

Two-detector, asymmetric cone-beam helical SPECT 双探测器，非对称锥束螺旋SPECT

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.1998.773823

G. L. Zeng, G. Gullberg

引用次数: 1

Monitoring of the HERA-B RICH photo detector HERA-B RICH光电探测器的监测

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.1998.775167

H. Calcao, J. Carvalho, M. Goncalves, I. Ivaniouchenkov, F. Moita

引用次数: 1

Design and performance of the Elefant digitizer IC for the BaBar drift chamber BaBar漂移室数字化集成电路的设计与性能

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.1998.775182

S. Dow, A. Karcher, M. Levi, M. Momayezi, H. V. D. Lippe, David Ando

{"title":"Design and performance of the Elefant digitizer IC for the BaBar drift chamber","authors":"S. Dow, A. Karcher, M. Levi, M. Momayezi, H. V. D. Lippe, David Ando","doi":"10.1109/NSSMIC.1998.775182","DOIUrl":"https://doi.org/10.1109/NSSMIC.1998.775182","url":null,"abstract":"A 250,000 transistor full custom integrated circuit for the readout of drift chamber signals has been developed, produced and characterized. The \"Elefant\" (ELEctronics For Amplitude 'N Timing) Digitizer IC is designed to measure both the charge and the single electron time of arrival of sense wire signals from the BaBar drift chamber. By combining a FADC (flash ADC) and a TDC (time-to-digital converter) for each channel, the digitizer IC can be optimized and simplified, to achieve the physics goals required of the drift chamber while reducing the per channel costs of the electronics. The Elefant IC also implements portions of the BaBar trigger protocols to simplify the connection of the chip to the rest of the BaBar detector. Each IC contains eight complete independent channels. The circuit has been implemented in a 0.8 /spl mu/m triple metal CMOS process and fabricated in production quantity to fully instrument the BaBar drift chamber and are now in operation. Performance results of the IC will be presented.","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":"129229341","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

Implementation and performance of an optical motion tracking system for high resolution brain PET imaging 高分辨率脑PET成像光学运动跟踪系统的实现与性能

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.1998.774360

B. Lopresti, A. Russo, W. F. Jones, T. Fisher, D. G. Crouch, D. E. Altenburger, David W. Townsend

引用次数: 111

Properties of new mixed Lu/sub x/(RE/sup 3+/)/sub 1-x/AlO/sub 3/:Ce scintillators (RE/sup 3+/=Y/sup 3+/ or Gd/sup 3+/) compared with other Ce-doped or intrinsic scintillation crystals 新型混合Lu/sub x/(RE/sup 3+/)/sub 1-x/AlO/sub 3/:Ce闪烁体(RE/sup 3+/=Y/sup 3+/或Gd/sup 3+/)与其他掺Ce或本征闪烁晶体的性能比较

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.1998.775198

J. Mares, M. Nikl, J. Chval, E. Mihóková, J. Giba, K. Nejezchleb, D. Clement, J. Loude, C. Morel

引用次数: 1

4-channel rad-hard delay generation ASIC with 1 ns timing resolution for LHC 用于LHC的4通道硬延迟产生ASIC，时间分辨率为1ns

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.1998.775176

T. Toifl, R. Vari, P. Moreira, A. Marchioro

引用次数: 26

A new type of DAQ system using fast and gigabit Ethernet networks 一种采用快速千兆以太网的新型数据采集系统

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.1998.774325

S. Dhawan

引用次数: 0

A 500 k event/sec 12-bit ADC system with high-speed buffered PCI interface 具有高速缓冲PCI接口的500k事件/秒12位ADC系统

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.1998.775186

V. Zavarzin, W.A. Earle

引用次数: 12

Modeling scatter in multiple energy windows for incorporating scattered radiation information in SPECT imaging 多能量窗散射建模用于SPECT成像中散射辐射信息的整合

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.1998.773886

Z. Liu, T. Obi, M. Yamguchi, N. Ohyama

{"title":"Modeling scatter in multiple energy windows for incorporating scattered radiation information in SPECT imaging","authors":"Z. Liu, T. Obi, M. Yamguchi, N. Ohyama","doi":"10.1109/NSSMIC.1998.773886","DOIUrl":"https://doi.org/10.1109/NSSMIC.1998.773886","url":null,"abstract":"The scatter in single photon emission computed tomography (SPECT) contains activity information and some reports showed that it is possible to use this information for improving image quantity. The method is modeling scatter in multiple energy windows in reconstruction. However, what the performance and what noise behavior will be when using scattered radiation in reconstruction are the problems remaining unanswered. Here, the authors investigate the method of modeling scatter in multiple energy windows in the cases of few projection views. The system performance is analyzed by using singular value decomposition (SVD). For investigating noise behavior, the reconstruction is accomplished by estimating the variance of reconstructed voxel values. The effectiveness of using scatter in noise cases is evaluated by resolution kernel analysis. The results show that the improvements due to using scatter are shown in normalized mean square error (NMEM) of reconstructed images and the resolution kernels. When photon counts fall below about one million, there is still some effectiveness of using scatter in the cases of few projection views.","PeriodicalId":129202,"journal":{"name":"1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255)","volume":"18 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":"125982973","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

Fourier rebinning applied to multi-planar circular-orbit cone-beam SPECT 多平面圆轨道锥束SPECT的傅里叶重建

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.1998.774364

D. Lalush

{"title":"Fourier rebinning applied to multi-planar circular-orbit cone-beam SPECT","authors":"D. Lalush","doi":"10.1109/NSSMIC.1998.774364","DOIUrl":"https://doi.org/10.1109/NSSMIC.1998.774364","url":null,"abstract":"We study the application of Fourier rebinning methods to dual-planar cone-beam SPECT. Dual-planar cone-beam SPECT involves the use of a matched pair of cone-beam collimators on a dual-camera SPECT system. Each collimator has its focus in a different axial plane. While dual-planar data is best reconstructed with fully 3D iterative methods, these methods are slow and have prompted a search for faster reconstruction techniques. Fourier rebinning was developed to estimate equivalent parallel projections from 3D PET data, but it simply expresses a relationship between oblique projections taken in planes not perpendicular to the axis of rotation and direct projections taken in those that are. We find that it is possible to put dual-planar cone-beam data in this context as well. The rebinned data can then be reconstructed using either filtered backprojection (FBP) or parallel iterative algorithms such as OSEM. We compare the Feldkamp algorithm and fully 3D OSEM reconstruction with Fourier-rebinned reconstructions on realistically-simulated Tl-201 HMPAO brain SPECT data. We find that the Fourier-rebinned reconstructions exhibit much less image noise and lower variance in region-of-interest estimates than Feldkamp. Also, Fourier-rebinning followed by OSEM with nonuniform attenuation correction exhibits less bias in ROI estimates than Feldkamp with Chang attenuation correction. The Fourier-rebinned ROI estimates exhibit only slightly higher bias and variance than fully 3D OSEM, and require considerably less processing time. We conclude that Fourier rebinning is a practical and potentially useful approach to reconstructing data from dual-planar circular-orbit cone-beam systems.","PeriodicalId":129202,"journal":{"name":"1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255)","volume":"46 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":"132294746","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