Simulation studies of a high resolution SPECT system for a photon counting semiconductor detector
Photon counting detector using cadmium telluride (CdTe) or cadmium zinc telluride (CZT) has benefits compared to conventional scintillation detector.These materials have advantageous physical characteristics for nuclear medicine imaging.Recently,for improvement of the sensitivity and the spatial resolution,many researchers have been investigated using these materials.By using the pixelated parallelhole collimator,we may be able to improve the sensitivity in small pixel condition and the spatial resolution.In this study,we simulated the SPECT system using the photon counting detector based on CdTe and CZT,and evaluated the performance of these systems.We performed a simulation study using the Geant4 Application for Tomographic Emission (GATE) simulation.The proposed system was equipped with a CdTe and CZT detector with very small pixels such as 0.35 × 0.35 mm2.The results showed that the proposed system could be acquired the 0.46 mm spatial resolution located at 2 cm from the collimator.In conclusion,our results demonstrated that we established the high resolution SPECT system with the pixelated parallel–hole collimator.
photon counting detector CdTe CZT high resolution SPECT system pixelated parallel-hole collimator
Young-Jin Lee Hyun-Ju Ryu Hyo-Min Cho Seung-Wan Lee Yu-Na Choi Hee-Joung Kim
Department of Radiological Science and Research Institute of Health Science, Yonsei Universitiy, Wonju, Korea
国际会议
World Congress on Medical Physics and Biomedical Engineering (2012年医学物理及生物医学工程国际会议(IFMBE))
北京
英文
1068-1071
2012-05-26（万方平台首次上网日期，不代表论文的发表时间）