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28 May 1999 Optimization of detector sampling for mutlislice CT scanners
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Abstract
In computed tomography (CT), the elapsed time of a complete organ coverage is an important parameter for many clinical applications. This requirement has let to the development of both sub-second and multi-slice CT scanners. Examples of the multi-slice scanners include twin beam CT and quad CT (QCT). Although they are different in terms of number of detector rows employed in the design, they share the common property that the spacing between adjacent detector rows is essentially identical to the detector cell size, and the spacing remains constant regardless of the scanning conditions. This restriction has led to a sub-optimal sampling along the patient axis. In this paper, we present an optimized detector sampling scheme. In the proposed scheme, the detector spacing is dynamically adjusted based on the helical pitch. This allows an improved sampling pattern along the patient axis. In conjunction with the proposed sampling scheme, an helical interpolation reconstruction algorithm is proposed. Detailed analysis and computer simulations are performed to validate our approach.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jiang Hsieh "Optimization of detector sampling for mutlislice CT scanners", Proc. SPIE 3659, Medical Imaging 1999: Physics of Medical Imaging, (28 May 1999); https://doi.org/10.1117/12.349573
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