Iterative scatter correction for x-ray cone-beam CT with semi-transparent beam stop array

Hao Yan; Xuanqin Mou; Shaojie Tang; Xi Chen

doi:10.1117/12.812389

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13 March 2009 Iterative scatter correction for x-ray cone-beam CT with semi-transparent beam stop array

Hao Yan, Xuanqin Mou, Shaojie Tang, Xi Chen

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Proceedings Volume 7258, Medical Imaging 2009: Physics of Medical Imaging; 725838 (2009) https://doi.org/10.1117/12.812389
Event: SPIE Medical Imaging, 2009, Lake Buena Vista (Orlando Area), Florida, United States

Abstract

X-ray scatter correction is an open problem in the research of cone beam CT (CBCT). In this paper, using semitransparent beam stop array (BSA) introduced recently¹, an improved BSA method² is proposed. A simple iterative correction algorithm is developed based on the knowledge that mostly primary varies continuously. With the proposed method, scatter correction could be accomplished without extra scan. Experiments are carried out based on the Monte Carlo (MC) simulation (EGSnrc), the mean square error (MSE) is reduced from 50.71% (with no correction) to 2.54%, and there is no visible negative impact introduced by the correction.

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Hao Yan, Xuanqin Mou, Shaojie Tang, and Xi Chen "Iterative scatter correction for x-ray cone-beam CT with semi-transparent beam stop array", Proc. SPIE 7258, Medical Imaging 2009: Physics of Medical Imaging, 725838 (13 March 2009); https://doi.org/10.1117/12.812389

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