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Sensors 2013, 13(4), 5167-5180;

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

Department of Biomedical Engineering, Tsinghua University, Beijing 100084, China
Author to whom correspondence should be addressed.
Received: 6 February 2013 / Revised: 15 April 2013 / Accepted: 16 April 2013 / Published: 18 April 2013
(This article belongs to the Special Issue Medical & Biological Imaging)
Full-Text   |   PDF [808 KB, uploaded 21 June 2014]


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. View Full-Text
Keywords: computed tomography; X-ray detector; performance evaluation; uniformity correction computed tomography; X-ray detector; performance evaluation; uniformity correction
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Guo, Z.; Tang, Z.; Wang, X.; Deng, M.; Hu, G.; Zhang, H. Performance Evaluation of a Modular Detector Unit for X-Ray Computed Tomography. Sensors 2013, 13, 5167-5180.

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