IEEE Nuclear Science Symposium Conference Record, 2005最新文献_第7页

The second generation HRRT - a multi-centre scanner performance investigation 第二代HRRT -多中心扫描仪性能调查

IEEE Nuclear Science Symposium Conference Record, 2005 Pub Date : 2005-12-01 DOI: 10.1109/NSSMIC.2005.1596770

V. Sossi, H. de Jong, W. Barker, P. Bloomfield, Z. Burbar, M. Camborde, C. Comtat, L. Eriksson, S. Houle, D. Keator, C. Knob, R. Krais, A. Lammertsma, A. Rahmim, M. Sibomana, M. Teras, C. Thompson, R. Trébossen, J. Votaw, M. Walker, K. Wienhard, D. Wong

{"title":"The second generation HRRT - a multi-centre scanner performance investigation","authors":"V. Sossi, H. de Jong, W. Barker, P. Bloomfield, Z. Burbar, M. Camborde, C. Comtat, L. Eriksson, S. Houle, D. Keator, C. Knob, R. Krais, A. Lammertsma, A. Rahmim, M. Sibomana, M. Teras, C. Thompson, R. Trébossen, J. Votaw, M. Walker, K. Wienhard, D. Wong","doi":"10.1109/NSSMIC.2005.1596770","DOIUrl":"https://doi.org/10.1109/NSSMIC.2005.1596770","url":null,"abstract":"The high resolution research tomograph (HRRT) is one of the most complex existing positron emission tomographs: it is the only human size scanner capable of decoding the depth of the /spl gamma/-ray interaction in the crystal, using a lutetium LSO/LYSO phoswich detector arrangement. In this study we determined basic scanner hardware characteristics, such as scanner data acquisition stability, and their variability across eleven centres. In addition a subset of the NEMA NU-2001 standards measurements was performed. We found (i) significant variability in the DOI decoding results between centres, (ii) a trend toward an increasing number of detected true coincident events as a function of elapsed time from scanner calibration likely due to a shifting energy spectrum, (iii) a count-rate dependent layer identification, (iv) scatter fraction ranging from /spl sim/ 42% to 54% where the variability was partly related to the shifting of the energy spectrum, (v) sensitivity ranging from /spl sim/5.5% to 6.5% across centres, (vi) resolution of /spl sim/(2.5 mm)/sup 3/, fairly consistent across centres, (vii) image quality which is very comparable to other scanners.","PeriodicalId":105619,"journal":{"name":"IEEE Nuclear Science Symposium Conference Record, 2005","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121800728","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: 104

Advanced gaseous photodetectors for hyperspectroscopy and other applications 用于超光谱学和其他应用的先进气体光电探测器

IEEE Nuclear Science Symposium Conference Record, 2005 Pub Date : 2005-11-25 DOI: 10.1109/NSSMIC.2005.1596972

I. Rodionov, J. Bidault, I. Crotty, P. Fonte, F. Galy, V. Peskov, O. Zanette

引用次数: 4

The X-ray telescope of the CAST experiment CAST实验的x射线望远镜

IEEE Nuclear Science Symposium Conference Record, 2005 Pub Date : 2005-11-14 DOI: 10.1109/NSSMIC.2005.1596436

R. Kotthaus, H. Bräuninger, P. Friedrich, R. Hartmann, D. Kang, M. Kuster, Gerhard Lutz, L. Struder

引用次数: 1

Characterization of a PET camera optimized for prostate imaging 一种用于前列腺成像优化的PET相机的特性

IEEE Nuclear Science Symposium Conference Record, 2005 Pub Date : 2005-11-11 DOI: 10.1109/NSSMIC.2005.1596615

J. Huber, W. Choong, W. Moses, J. Qi, J. Hu, G. Wang, D. Wilson, S. Oh, R. Huesman, S. Derenzo

{"title":"Characterization of a PET camera optimized for prostate imaging","authors":"J. Huber, W. Choong, W. Moses, J. Qi, J. Hu, G. Wang, D. Wilson, S. Oh, R. Huesman, S. Derenzo","doi":"10.1109/NSSMIC.2005.1596615","DOIUrl":"https://doi.org/10.1109/NSSMIC.2005.1596615","url":null,"abstract":"We present the characterization of a positron emission tomograph for prostate imaging that centers a patient between a pair of external curved detector banks (ellipse: 45 cm minor, 70 cm major axis). The distance between detector banks adjusts to allow patient access and to position the detectors as closely as possible for maximum sensitivity with patients of various sizes. Each bank is composed of two axial rows of 20 HR+ block detectors for a total of 80 detectors in the camera. The individual detectors are angled in the transaxial plane to point towards the prostate to reduce resolution degradation in that region. The detectors are read out by modified HRRT data acquisition electronics. Compared to a standard whole-body PET camera, our dedicated-prostate camera has the same sensitivity and resolution, less background (less randoms and lower scatter fraction) and a lower cost. We have completed construction of the camera. Characterization data and reconstructed images of several phantoms are shown. Sensitivity of a point source in the center is 946 cps/muCi. Spatial resolution is 4 mm FWHM in the central region","PeriodicalId":105619,"journal":{"name":"IEEE Nuclear Science Symposium Conference Record, 2005","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125960667","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

Dual-modality PET/ultrasound imaging of the prostate 前列腺PET/超声双模成像

IEEE Nuclear Science Symposium Conference Record, 2005 Pub Date : 2005-11-11 DOI: 10.1109/NSSMIC.2005.1596768

J. Huber, W. Moses, J. Pouliot, I. Hsu

{"title":"Dual-modality PET/ultrasound imaging of the prostate","authors":"J. Huber, W. Moses, J. Pouliot, I. Hsu","doi":"10.1109/NSSMIC.2005.1596768","DOIUrl":"https://doi.org/10.1109/NSSMIC.2005.1596768","url":null,"abstract":"Functional imaging with positron emission tomography (PET) will detect malignant tumors in the prostate and/or prostate bed, as well as possibly help determine tumor \"aggressiveness.\" However, the relative uptake in a prostate tumor can be so great that few other anatomical landmarks are visible in a PET image. Ultrasound imaging with a transrectal probe provides anatomical detail in the prostate region that can be co-registered with the sensitive functional information from the PET imaging. Imaging the prostate with both PET and transrectal ultrasound (TRUS) will help determine the location of any cancer within the prostate region. This dual-modality imaging should help provide better detection and treatment of prostate cancer. LBNL has built a high performance positron emission tomograph optimized to image the prostate. Compared to a standard whole-body PET camera, our prostate-optimized PET camera has the same sensitivity and resolution, less backgrounds and lower cost. We plan to develop the hardware and software tools needed for a validated dual PET/TRUS prostate imaging system. We also plan to develop dual prostate imaging with PET and external transabdominal ultrasound, in case the TRUS system is too uncomfortable for some patients. We present the design and intended clinical uses for these dual imaging systems.","PeriodicalId":105619,"journal":{"name":"IEEE Nuclear Science Symposium Conference Record, 2005","volume":"05 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128773907","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

High efficiency detection of argon scintillation light of 128 nm using LAAPDs laapd对128 nm氩闪烁光的高效检测

IEEE Nuclear Science Symposium Conference Record, 2005 Pub Date : 2005-11-10 DOI: 10.1109/NSSMIC.2005.1596232

R. Chandrasekharan, A. Knecht, M. Messina, C. Regenfus, A. Rubbia

引用次数: 3

Comparing imaging and non-imaging techniques for reducing background clutter and resolving distant point sources 比较成像和非成像技术减少背景杂波和分辨远距离点源

IEEE Nuclear Science Symposium Conference Record, 2005 Pub Date : 2005-11-10 DOI: 10.1109/NSSMIC.2005.1596266

R. Wurtz, K. Ziock, L. Fabris, R. Graham

引用次数: 7

Imaging performance of the Si/Ge hybrid Compton imager Si/Ge混合康普顿成像仪的成像性能

IEEE Nuclear Science Symposium Conference Record, 2005 Pub Date : 2005-11-10 DOI: 10.1109/NSSMIC.2005.1596196

M. Burks, D. Chivers, C. Cork, M. Cunningham, L. Fabris, D. Gunter, E. Hull, D. Lange, H. Manini, L. Mihailescu, K. Nelson, T. Niedermayr, J. Valentine, K. Vetter, D. Wright

引用次数: 4

Improved spatial resolution in thick, fully-depleted CCDs with enhanced red sensitivity 提高了厚的、完全耗尽的ccd的空间分辨率，增强了红色灵敏度

IEEE Nuclear Science Symposium Conference Record, 2005 Pub Date : 2005-11-10 DOI: 10.1109/NSSMIC.2005.1596437

J. Fairfield

引用次数: 12

Neutron resonance radiography for explosives detection: technical challenges 用于炸药探测的中子共振射线照相:技术挑战

IEEE Nuclear Science Symposium Conference Record, 2005 Pub Date : 2005-11-09 DOI: 10.1109/NSSMIC.2005.1596222

W. Raas, B. Blackburn, E. Boyd, J. Hall, G. Kohse, R. Lanza, B. Rusnak, J. Watterson

{"title":"Neutron resonance radiography for explosives detection: technical challenges","authors":"W. Raas, B. Blackburn, E. Boyd, J. Hall, G. Kohse, R. Lanza, B. Rusnak, J. Watterson","doi":"10.1109/NSSMIC.2005.1596222","DOIUrl":"https://doi.org/10.1109/NSSMIC.2005.1596222","url":null,"abstract":"Fast neutron resonance radiography (NRR) has recently become a focus of investigation as a supplement to conventional X-ray systems as a non-invasive, non-destructive means of detecting explosive material concealed in checked luggage or cargo containers at airports. Using fast (1-6 MeV) neutrons produced by the D(d,n)3He reaction, NRR provides both an imaging capability and the ability to determine the chemical composition of materials in baggage or cargo. Elemental discrimination is achieved by exploiting the resonance features of the neutron cross-section for oxygen, nitrogen, carbon, and hydrogen. Simulations have shown the effectiveness of multiple-element NRR through Monte Carlo transport methods; this work is focused on the development of a prototype system that will incorporate an accelerator-based neutron source and a neutron detection and imaging system to demonstrate the realistic capabilities of NRR in distinguishing the elemental components of concealed objects. Preliminary experiments have exposed significant technical difficulties unapparent in simulations, including the presence of image contamination from gamma ray production, the detection of low-fluence fast neutrons in a gamma field, and the mechanical difficulties inherent in the use of thin foil windows for gas cell confinement. To mitigate these concerns, a new gas target has been developed to simultaneously reduce gamma ray production and increase structural integrity in high flux gas targets. Development of a neutron imaging system and neutron counting based on characteristic neutron pulse shapes have been investigated as a means of improving signal to noise ratios, reducing irradiation times, and increasing the accuracy of elemental determination","PeriodicalId":105619,"journal":{"name":"IEEE Nuclear Science Symposium Conference Record, 2005","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123059953","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