The jPET-D4: imaging performance of the 4-layer depth-of-interaction PET scanner
The jPET-D4: imaging performance of the 4-layer depth-of-interaction PET scanner
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jPET-D4：4 层交互深度 PET 扫描仪的成像性能
DOI：
10.1109/nssmic.2005.1596720
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
H. Murayama
中科院分区：
文献类型：
--
作者：
T. Yamaya;E. Yoshida;M. Satoh;T. Tsuda;K. Kitamura;T. Obi;T. Hasegawa;H. Haneishi;N. Inadama;S. Tanada;H. Murayama
jPET-D4 是一款高性能脑 PET 扫描仪，通过辨别 4 层交互深度 (DOI) 信息，不仅实现了高空间分辨率，还实现了高扫描仪灵敏度。扫描仪设计为5个环，每个环24个探测器块，探测器块由1,024个2.9毫米/spl次/2.9毫米/spl次/7.5毫米的GSO晶体组成，排列成4层，每层16个/spl次/16阵列。在本文中，我们研究了组装了 5 个块探测器环之一的 jPET-D4 原型的成像性能。为了降低计算成本，同时保留 DOI 信息在迭代图像重建中的优势，我们提出了 DOI 压缩（DOIC）方法，该方法可减少数据维度并抑制分辨率损失。我们还为 jPET-D4 提出了一个近似系统模型，可以在保持图像质量的同时实现快速系统矩阵计算。实验结果表明，利用4层DOI信息在视场范围内获得了几乎均匀的2-3 mm的空间分辨率。哈夫曼幻影图像清楚地显示了 jPET-D4 出色的成像性能。
The jPET-D4 is a high-performance brain PET scanner which achieves not only high spatial resolution but also high scanner sensitivity by discriminating 4-layer depth-of-interaction (DOI) information. The scanner is designed to have 5 rings of 24 detector blocks each, and the detector block consists of 1,024 GSO crystals of 2.9 mm /spl times/ 2.9 mm /spl times/ 7.5 mm, which are arranged in 4 layers of 16 /spl times/ 16 arrays. In this paper, we investigated the imaging performance of the jPET-D4 prototype where one of the 5 block-detector rings was assembled. In order to reduce computational cost while retaining the advantage of DOI information in iterative image reconstruction, we have proposed the DOI compression (DOIC) method which reduces data dimensions with suppressing resolution loss. We have also proposed an approximated system model for the jPET-D4 which enables fast system matrix calculation while preserving image quality. The experimental results show that almost uniform spatial resolution of 2-3 mm is obtained over the field-of-view by using the 4-layer DOI information. A Huffman phantom image clearly shows the excellent imaging performance of the jPET-D4.
影响因子：
3.8
作者：
SIDDON, RL
通讯作者：
SIDDON, RL