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Performance Evaluation of a Modular Detector Unit for X-Ray Computed Tomography

Authors :
Guangshu Hu
Mingliang Deng
Xinzeng Wang
Zhiwei Tang
Zhe Guo
Hui Zhang
Source :
Sensors, Vol 13, Iss 4, Pp 5167-5180 (2013)
Publication Year :
2013
Publisher :
MDPI AG, 2013.

Abstract

A research prototype CT scanner is currently under development in our lab. One of the key components in this project is the CT detector. This paper describes the design and performance evaluation of the modular CT detector unit for our proposed scanner. It consists of a Photodiode Array Assembly which captures irradiating X-ray photons and converts the energy into electrical current, and a mini Data Acquisition System which performs current integration and converts the analog signal into digital samples. The detector unit can be easily tiled together to form a CT detector. Experiments were conducted to characterize the detector performance both at the single unit level and system level. The noise level, linearity and uniformity of the proposed detector unit were reported and initial imaging studies were also presented which demonstrated the potential application of the proposed detector unit in actual CT scanners.

Details

Language :
English
ISSN :
14248220
Volume :
13
Issue :
4
Database :
Directory of Open Access Journals
Journal :
Sensors
Publication Type :
Academic Journal
Accession number :
edsdoj.f18785b570814bdf893fdf2eec33e4eb
Document Type :
article
Full Text :
https://doi.org/10.3390/s130405167