A CMOS Front-End Interface ASIC for SiPM-based Positron Emission Tomography Imaging Systems.

IEEE Biomedical Circuits and Systems Conference : healthcare technology : [proceedings]. IEEE Biomedical Circuits and Systems Conference Pub Date : 2017-10-01 Epub Date: 2018-03-29 DOI:10.1109/BIOCAS.2017.8325059

Samrat Dey, Jacques C Rudell, Thomas K Lewellen, Robert S Miyaoka

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引用次数: 5

Abstract

A current-mode interface chip for Silicon Photomultiplier (SiPM) array based positron emission tomography (PET) imaging front-ends is described. The circuit uses a high-speed current amplifier with a low input impedance, to minimize signal loss at the SiPM amplifier interface. To reduce the impact of dark noise, a novel high-speed threshold detection/comparator circuit is used to remove unwanted noise events. A prototype chip interfaces an array of SiPMs to the digital backend of a Positron Emission Tomography (PET) system using 64 readout channels, each of which contain a current amplifier and a threshold detection component. To reduce the number of backend channels, a row-column pulse positioning architecture (RCA) has been implemented. The ASIC occupies an area of 14.04 mm² in 130nm STMicroelectronics HCMOS9GP process. The measured input impedance of the current amplifier is 20 ohms at 10 MHz, while the threshold detection circuit's propagation delay is 0.3-2ns.

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基于sipm的正电子发射层析成像系统的CMOS前端接口ASIC。

介绍了一种用于硅光电倍增管(SiPM)阵列正电子发射层析成像(PET)前端的电流模式接口芯片。该电路采用低输入阻抗的高速电流放大器，最大限度地减少SiPM放大器接口的信号损耗。为了减少暗噪声的影响，采用了一种新型的高速阈值检测/比较器电路来去除不需要的噪声事件。一个原型芯片使用64个读出通道将一组SiPMs连接到正电子发射断层扫描(PET)系统的数字后端，每个通道包含一个电流放大器和一个阈值检测组件。为了减少后端信道的数量，实现了一种行列脉冲定位体系结构(RCA)。ASIC占地14.04 mm2，采用130nm意法半导体HCMOS9GP工艺。电流放大器在10 MHz时的测量输入阻抗为20欧姆，阈值检测电路的传播延迟为0.3-2ns。

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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IEEE Biomedical Circuits and Systems Conference : healthcare technology : [proceedings]. IEEE Biomedical Circuits and Systems Conference

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