12 March 2008 Registration of prone and supine colons in the presence of topological changes
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CT colonography is a minimally-invasive screening technique for colorectal polyps in which X-ray CT images of the distended colon are acquired, usually in the prone and supine positions. Registration of segmented colons from both images will be useful for computer-assisted polyp detection. We have previously presented algorithms for registration of the prone and supine colon when both are well distended and there is a single connected lumen. However due to inadequate bowel preparation or peristalsis there may be collapsed segments in one or both of the colons resulting in a topological change in the images. Such changes make deformable registrations of the colons difficult, and at present there are no registration algorithms which can accommodate them. In this paper we present an algorithm which can perform volume registration of prone/supine colon images in the presence of a topological change.
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Jung W. Suh, Jung W. Suh, Christopher L. Wyatt, Christopher L. Wyatt, } "Registration of prone and supine colons in the presence of topological changes", Proc. SPIE 6916, Medical Imaging 2008: Physiology, Function, and Structure from Medical Images, 69160C (12 March 2008); doi: 10.1117/12.770576; https://doi.org/10.1117/12.770576

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