Multi-pixel photon counter module for MRI compatible application

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-10-01 DOI:10.1109/NSSMIC.2015.7582021

K. Shimizu, K. Hakamata, T. Sakai, H. Yamauchi, H. Uchida, M. Hirayanagi, S. Nakamura, F. Nishikido, E. Yoshida, M. Suga, T. Obata, T. Yamaya

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引用次数: 2

Abstract

A new detector for PET using multi-pixel photon counters (MPPCs) was developed for MRI compatible applications. This module has an 8 × 8 MPPC array, each segment has a 3 mm × 3 mm active area, and the pitch of the array is 4.1 mm in both directions. A temperature sensor is attached to the back of the array for temperature compensation. The MPPC array is connected to the front-end circuit with a detachable flexible printed circuit cable (FPC), which provides flexibility for detector arrangement. The front-end circuit consists of preamplifiers, a register network, buffer amplifiers, a built-in high voltage (HV) unit, and an embedded microprocessor unit. The HV unit is a down-regulator and requires an external HV supply. The preamplifier also has a sum output, which can be used for timing pick-off and energy discrimination. With LYSOs, the timing performance was evaluated using flexible printed cables of two different lengths. Set in a copper shield box, energy spectra and flood images were evaluated with a 3T-MRI Very little interference was observed during simultaneous MRI measurements.

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用于MRI兼容应用的多像素光子计数器模块

利用多像素光子计数器(MPPCs)开发了一种新的PET检测器，用于MRI兼容应用。该模块采用一个8 × 8的MPPC阵列，每段有一个3mm × 3mm的有源区域，阵列在两个方向上的间距为4.1 mm。温度传感器附在阵列的背面，用于温度补偿。MPPC阵列通过可拆卸的柔性印刷电路电缆(FPC)连接到前端电路，为探测器的布置提供了灵活性。前端电路由前置放大器、寄存器网络、缓冲放大器、内置高压(HV)单元和嵌入式微处理器单元组成。高压装置是一个降压装置，需要外部高压电源。前置放大器也有一个和输出，可用于定时提取和能量鉴别。使用LYSOs，使用两种不同长度的柔性印刷电缆来评估时序性能。放置在铜屏蔽盒中，用3T-MRI评估能谱和洪水图像，同时进行MRI测量时观察到很少的干扰。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)

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