TY - GEN
T1 - Scatter fraction performance tests for positron imaging system with dual plane geometry
AU - Ni, Yu Ching
AU - Tsai, Tien Hsiu
AU - Jan, Meei Ling
AU - Lin, Zhi Kun
AU - Tseng, Fan Pin
AU - Hsu, Shiang Lin
PY - 2010
Y1 - 2010
N2 - NEMA NU 2 and IEC 61675-1 standards are widely used for characterizing the performance of PET scanners. These documents specify procedures for acquiring and analyzing data by using standard phantoms and radio-sources. However, some dedicated PET systems, such as breast and prostate PET systems, have non-ring geometric design may not meet these standards. In this work, we proposed certain modifications to the NEMA NU 2 for analyzing the scatter fraction (SF) of a dual-plane positron imaging system reasonably. A projection-map with geometric compensation was performed instead of sinogram to get analyzed profile. Three methods to determine analyzed window (4 FWHM, 40 mm width, and 14 mm width) were used to estimate SF. The effects of diameter and location of line source were also considered. Three diameters (0.6, 2, 3.2 mm) and nine locations of line source were set for GATE simulation. The equivalent SF of the dual-plane system was calculated as the area-weighted average of nine-position SF values. The results reveal that the presented method here can estimate SF value better, compared with the methods suggested by the standards.
AB - NEMA NU 2 and IEC 61675-1 standards are widely used for characterizing the performance of PET scanners. These documents specify procedures for acquiring and analyzing data by using standard phantoms and radio-sources. However, some dedicated PET systems, such as breast and prostate PET systems, have non-ring geometric design may not meet these standards. In this work, we proposed certain modifications to the NEMA NU 2 for analyzing the scatter fraction (SF) of a dual-plane positron imaging system reasonably. A projection-map with geometric compensation was performed instead of sinogram to get analyzed profile. Three methods to determine analyzed window (4 FWHM, 40 mm width, and 14 mm width) were used to estimate SF. The effects of diameter and location of line source were also considered. Three diameters (0.6, 2, 3.2 mm) and nine locations of line source were set for GATE simulation. The equivalent SF of the dual-plane system was calculated as the area-weighted average of nine-position SF values. The results reveal that the presented method here can estimate SF value better, compared with the methods suggested by the standards.
UR - http://www.scopus.com/inward/record.url?scp=79960302708&partnerID=8YFLogxK
U2 - 10.1109/NSSMIC.2010.5874164
DO - 10.1109/NSSMIC.2010.5874164
M3 - 会议稿件
AN - SCOPUS:79960302708
SN - 9781424491063
T3 - IEEE Nuclear Science Symposium Conference Record
SP - 2163
EP - 2165
BT - IEEE Nuclear Science Symposuim and Medical Imaging Conference, NSS/MIC 2010
T2 - 2010 IEEE Nuclear Science Symposium, Medical Imaging Conference, NSS/MIC 2010 and 17th International Workshop on Room-Temperature Semiconductor X-ray and Gamma-ray Detectors, RTSD 2010
Y2 - 30 October 2010 through 6 November 2010
ER -