NDLI: Development of compact readout electronics and efficient maximum-likelihood position estimator for multi-anode-PMT scintillation cameras

Content Provider	IEEE Xplore Digital Library
Author	Ming-Wei Lee Yu-Lin Lee Cheng-Ying Chen Yi-Chun Chen
Copyright Year	2013
Description	Author affiliation: Dept. of Opt. & Photonics, Nat. Central Univ., Jhongli, Taiwan (Ming-Wei Lee; Yu-Lin Lee; Cheng-Ying Chen; Yi-Chun Chen)
Abstract	In this study, a scintillation gamma camera applied to micro-SPECT is developed. The camera is composed of a NaI(Tl) scintillator, compact readout electronics and an efficient maximum-likelihood position estimator (MLPE) for a 64-anode PMT. The readout electronics consists of the symmetric charge division (SCD) circuits, the signal processing circuits and a multi-channel DAQ system to output 16 channel digital signals. Moreover, the MLPE is developed with the multivariate normal model and the truncated center-of-gravity combined with local directed search (TCOG-LDS) method to estimate the gamma-ray event position rapidly and accurately. To verify the feasibility of the proposed readout electronics and MLPE, simulation study and preliminary experiment for acquiring the mean detector response function (MDRF) of the gamma camera are performed. The simulated and preliminary experimental results show the TCOG-LDS method is faster than the exhaustive search by about 150 times and maintains the same position estimation accuracy. Furthermore, the integral uniformity (IU) of the proposed gamma camera is 43% and 26% in the useful field of view (UFOV) and the central field of view (CFOV) respectively in the simulation study. In the preliminary experiment, the IU of proposed gamma camera is 99.8% in both the UFOV and CFOV. Finally, probability matrices generated from the MDRF data are used to reassign counts in the flood image and in consequence improve the camera IU from 99.8% to 49.1%.
Starting Page	1
Ending Page	3
File Size	260540
Page Count	3
File Format	PDF
e-ISBN	9781479905348
DOI	10.1109/NSSMIC.2013.6829092
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-10-27
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cameras Readout electronics Maximum likelihood estimation Covariance matrices Floods Integrated circuit modeling Detectors
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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