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.
Highlights
X-ray computed tomography (CT) is a medical imaging technology that utilizes computer-processedX-ray projections to produce tomographic images or “slices” of specific areas of the body
This paper describes the design and development of the modular CT detector unit for our proposed scanner
It consists of a Photodiode Array Assembly (PDA) and a mini Data Acquisition System
Summary
X-ray computed tomography (CT) is a medical imaging technology that utilizes computer-processed. X-ray projections to produce tomographic images or “slices” of specific areas of the body. These images are used for diagnostic and therapeutic purposes in various medical applications. Despite the development of CT technology, there are very limited choices in terms of CT components and instruments for the research community. We proposed to build a modular CT scanner for the research purposes. One of the key components in this project is the CT detector. This paper describes the design and development of the modular CT detector unit for our proposed scanner. Initial imaging studies were presented to demonstrate the functionality of the modular CT detector unit
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