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Proceedings Paper

Flat-panel-detector-based cone beam volume CT imaging: detector evaluation
Author(s): Ruola Ning; Xiangyang Tang; Rongfeng Yu; David L. Conover; Dinghua Zhang
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Paper 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.

Paper Details

Date Published: 28 May 1999
PDF: 12 pages
Proc. SPIE 3659, Medical Imaging 1999: Physics of Medical Imaging, (28 May 1999); doi: 10.1117/12.349492
Show Author Affiliations
Ruola Ning, Univ. of Rochester (United States)
Xiangyang Tang, Univ. of Rochester (United States)
Rongfeng Yu, Univ. of Rochester (United States)
David L. Conover, Univ. of Rochester (United States)
Dinghua Zhang, Univ. of Rochester (United States)

Published in SPIE Proceedings Vol. 3659:
Medical Imaging 1999: Physics of Medical Imaging
John M. Boone; James T. Dobbins III, Editor(s)

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