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Proceedings Paper

Detectability index of differential phase contrast CT compared with conventional CT: a preliminary channelized Hotelling observer study
Author(s): Xiangyang Tang; Yi Yang; Shaojie Tang
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Paper Abstract

Under the framework of model observer with signal and background exactly known (SKE/BKE), we investigate the detectability of differential phase contrast CT compared with that of the conventional attenuation-based CT. Using the channelized Hotelling observer and the radially symmetric difference-of-Gaussians channel template , we investigate the detectability index and its variation over the dimension of object and detector cells. The preliminary data show that the differential phase contrast CT outperforms the conventional attenuation-based CT significantly in the detectability index while both the object to be detected and the cell of detector used for data acquisition are relatively small. However, the differential phase contrast CT’s dominance in the detectability index diminishes with increasing dimension of either object or detector cell, and virtually disappears while the dimension of object or detector cell approaches a threshold, respectively. It is hoped that the preliminary data reported in this paper may provide insightful understanding of the differential phase contrast CT’s characteristic in the detectability index and its comparison with that of the conventional attenuation-based CT.

Paper Details

Date Published: 6 March 2013
PDF: 10 pages
Proc. SPIE 8668, Medical Imaging 2013: Physics of Medical Imaging, 866854 (6 March 2013); doi: 10.1117/12.2008015
Show Author Affiliations
Xiangyang Tang, Emory Univ. School of Medicine (United States)
Yi Yang, Emory Univ. School of Medicine (United States)
Shaojie Tang, Emory Univ. School of Medicine (United States)


Published in SPIE Proceedings Vol. 8668:
Medical Imaging 2013: Physics of Medical Imaging
Robert M. Nishikawa; Bruce R. Whiting; Christoph Hoeschen, Editor(s)

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