Flat-panel-detector-based cone beam volume CT imaging: detector evaluation

Ruola Ning; Xiangyang Tang; Rongfeng Yu; David L. Conover; Dinghua Zhang

doi:10.1117/12.349492

28 May 1999 Flat-panel-detector-based cone beam volume CT imaging: detector evaluation

Ruola Ning, Xiangyang Tang, Rongfeng Yu, David L. Conover, Dinghua Zhang

Proceedings Volume 3659, Medical Imaging 1999: Physics of Medical Imaging; (1999) https://doi.org/10.1117/12.349492
Event: Medical Imaging '99, 1999, San Diego, CA, United States

Abstract

Recent development of large area flat panel solid state detector arrays indicates that flat panel image sensors have some common potential advantages: compactness, absence of geometric distortion and veiling glare with the benefits of high resolution, high DQE, high frame rate and high dynamic range, small image lag (less than 1%) and excellent linearity (approximately 1%). The advantages of the new flat-panel detector make it a promising candidate for cone beam volume CT imaging. The purpose of this study is to characterize an amorphous silicon thin film transistor (STFT) flat panel detector-based imaging system for cone beam volume CT applications. A prototype STFT detector-based cone beam volume CT imaging system has been designed and constructed based on the modification of a GE 8800 CT scanner. This system is evaluated using two phantoms: a low contrast phantom, and a GE CT quality assurance phantom. The results indicate that the flat panel detector-based volume cone beam can achieve a better spatial resolution than that of a standard fan beam CT and a low contrast resolution approaching that of a standard fan beam CT. The results also suggest that to use a flat panel detector for cone beam Volume CT, the design and construction of the detector should be optimized for tomographic acquisition and reconstruction.

Citation Download Citation

Ruola Ning, Xiangyang Tang, Rongfeng Yu, David L. Conover, and Dinghua Zhang "Flat-panel-detector-based cone beam volume CT imaging: detector evaluation", Proc. SPIE 3659, Medical Imaging 1999: Physics of Medical Imaging, (28 May 1999); https://doi.org/10.1117/12.349492

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