TY - GEN
T1 - The engineering and initial results of a transformable low-cost ultra-high resolution PET camera
AU - Li, Hongdi
AU - Wong, Wai Hoi
AU - Baghaei, Hossain
AU - Uribe, Jorge
AU - Wang, Yu
AU - Zhang, Yuxuan
AU - Kim, Soonseok
AU - Ramirez, Rocio
AU - Liu, Jiguo
AU - Liu, Shitao
PY - 2006
Y1 - 2006
N2 - We have developed an ultra-high resolution transformable PET camera that can be transfigured into a Whole-body mode (83-cm detector ring diameter, 13-cm axial FOV) or a brain/breast (54-cm diameter, 21-cm axial FOV) mode. The camera has 12 rectangular detector modules, and the detector gap between adjacent modules is very small and remains constant for every configuration. Each module has a large detection area (13 cm × 21 cm) and 3,168 BGO detector crystals of 2.7 × 2.7 × 18 mm3 with built-in front-end electronics. To improve spatial sampling, the gantry rotates 30° with a fine step size of 1° for each position, and the high-speed electronics and detector modules also rotate along with the gantry, This system uses only 924 photomultiplier tubes (PMT) by applying a low-cost high-resolution PMT-quadrant-sharing detector design. To compensate for the slower scintillation timing of BGO detectors, the camera is equipped with the "HYPER", high yield pile-up event recovery front-end electronics. A fast LED cross-reference PMT tuning method is used to maintain the PMT gain balance. The system has been constructed and tested for preliminary imaging characteristics. The system sensitivity is 4.2% for whole-body and 9.2% for brain/breast mode measured with Na-22 at center of FOV. For brain/breast mode, the transaxial image resolutions at 0, 10 cm were found to be 2.7 and 4.0 mm, respectively, while for whole-body mode, the image resolutions are 3.3 and 3.9 mm. The axial resolution ranges from 2.8 to 3.5mm for middle 7 detector rings. High quality Hoffman brain phantom images were obtained in both modes.
AB - We have developed an ultra-high resolution transformable PET camera that can be transfigured into a Whole-body mode (83-cm detector ring diameter, 13-cm axial FOV) or a brain/breast (54-cm diameter, 21-cm axial FOV) mode. The camera has 12 rectangular detector modules, and the detector gap between adjacent modules is very small and remains constant for every configuration. Each module has a large detection area (13 cm × 21 cm) and 3,168 BGO detector crystals of 2.7 × 2.7 × 18 mm3 with built-in front-end electronics. To improve spatial sampling, the gantry rotates 30° with a fine step size of 1° for each position, and the high-speed electronics and detector modules also rotate along with the gantry, This system uses only 924 photomultiplier tubes (PMT) by applying a low-cost high-resolution PMT-quadrant-sharing detector design. To compensate for the slower scintillation timing of BGO detectors, the camera is equipped with the "HYPER", high yield pile-up event recovery front-end electronics. A fast LED cross-reference PMT tuning method is used to maintain the PMT gain balance. The system has been constructed and tested for preliminary imaging characteristics. The system sensitivity is 4.2% for whole-body and 9.2% for brain/breast mode measured with Na-22 at center of FOV. For brain/breast mode, the transaxial image resolutions at 0, 10 cm were found to be 2.7 and 4.0 mm, respectively, while for whole-body mode, the image resolutions are 3.3 and 3.9 mm. The axial resolution ranges from 2.8 to 3.5mm for middle 7 detector rings. High quality Hoffman brain phantom images were obtained in both modes.
UR - http://www.scopus.com/inward/record.url?scp=38649104858&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=38649104858&partnerID=8YFLogxK
U2 - 10.1109/NSSMIC.2006.354387
DO - 10.1109/NSSMIC.2006.354387
M3 - Conference contribution
AN - SCOPUS:38649104858
SN - 1424405610
SN - 9781424405619
T3 - IEEE Nuclear Science Symposium Conference Record
SP - 2360
EP - 2364
BT - 2006 IEEE Nuclear Science Symposium - Conference Record
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2006 IEEE Nuclear Science Symposium, Medical Imaging Conference and 15th International Workshop on Room-Temperature Semiconductor X- and Gamma-Ray Detectors, Special Focus Workshops, NSS/MIC/RTSD
Y2 - 29 October 2006 through 4 November 2006
ER -