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

Sensors

Zhe Guo¹  Zhiwei Tang¹  Xinzeng Wang¹  Mingliang Deng¹  Guangshu Hu¹ 

[1] Department of Biomedical Engineering, Tsinghua University, Beijing 100084, China;

关键词: computed tomography;    X-ray detector;    performance evaluation;    uniformity correction;   

DOI  :  10.3390/s130405167

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.