A new DOI detector design using discrete crystal array with depth-dependent reflector patterns and single-ended readout

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• 作者：Seung-Jae Lee^a ; Chaeyeong Lee^a ; Jihoon Kang^b ; ^{ray.jihoon.kang@gmail.com} ; Yong Hyun Chung^a ; ^{ychung@yonsei.ac.kr}
• 关键词：Depth of interaction ; Reflector patterns ; Light distribution ; Single-ended readout
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2017
• 出版时间：21 January 2017
• 年：2017
• 卷：843
• 期：Complete
• 页码：1-4
• 全文大小：887 K
• 卷排序：843

文摘

We developed a depth of interaction (DOI) positron emission tomography (PET) detector using depth-dependent reflector patterns in a discrete crystal array. Due to the different reflector patterns at depth, light distribution was changed relative to depth. As a preliminary experiment, we measured DOI detector module crystal identification performance. The crystal consisted of a 9×9 array of 2 mmx2 mmx20 mm lutetium-yttrium oxyorthosilicate (LYSO) crystals. The crystal array was optically coupled to a 64-channel position-sensitive photomultiplier tube with a 2 mmx2 mm anode size and an 18.1 mmx18.1 mm effective area. We obtained the flood image with an Anger-type calculation. DOI layers and 9×9 pixels were well distinguished in the obtained images. Preclinical PET scanners based on this detector design offer the prospect of high and uniform spatial resolution.