40 4

A Readout IC Using Two-Step Fastest Signal Identification for Compact Data Acquisition of PET Systems

Title
A Readout IC Using Two-Step Fastest Signal Identification for Compact Data Acquisition of PET Systems
Author
권오경
Keywords
positron emission tomography; PET; fastest signal identification; readout IC; Geiger-mode avalanche photodiode; GAPD; lutetium-yttrium oxyorthosilicate; LYSO
Issue Date
2016-10
Publisher
MDPI AG
Citation
SENSORS, v. 16, NO. 10, Page. 1-14
Abstract
A readout integrated circuit (ROIC) using two-step fastest signal identification (FSI) is proposed to reduce the number of input channels of a data acquisition (DAQ) block with a high-channel reduction ratio. The two-step FSI enables the proposed ROIC to filter out useless input signals that arise from scattering and electrical noise without using complex and bulky circuits. In addition, an asynchronous fastest signal identifier and a self-trimmed comparator are proposed to identify the fastest signal without using a high-frequency clock and to reduce misidentification, respectively. The channel reduction ratio of the proposed ROIC is 16: 1 and can be extended to 16 x N: 1 using N ROICs. To verify the performance of the two-step FSI, the proposed ROIC was implemented into a gamma photon detector module using a Geiger-mode avalanche photodiode with a lutetium-yttrium oxyorthosilicate array. The measured minimum detectable time is 1 ns. The difference of the measured energy and timing resolution between with and without the two-step FSI are 0.8% and 0.2 ns, respectively, which are negligibly small. These measurement results show that the proposed ROIC using the two-step FSI reduces the number of input channels of the DAQ block without sacrificing the performance of the positron emission tomography (PET) systems.
URI
https://www.mdpi.com/1424-8220/16/10/1748http://repository.hanyang.ac.kr/handle/20.500.11754/99119
ISSN
1424-8220
DOI
10.3390/s16101748
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
Files in This Item:
A Readout IC Using Two-Step Fastest Signal Identification for Compact Data Acquisition of PET Systems.pdfDownload
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE