Comput Methods Programs Biomed - An improved method of automatic colon segmentation for virtual colon unfolding.

Tópicos

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Resumo

The technique of virtual colon unfolding (VU) is a non-invasive procedure to detect polyps on the colon inner wall. Compared with conventional virtual colonoscopy, VU is faster and results in fewer uninspected regions. However, the performance of VU is more vulnerable to the quality of colon segmentation. In this paper, an improved colon segmentation method is proposed to enhance the performance of VU. The improved method is with the use of a novel post-processing scheme, which is composed of two parts: attain more accurate centerlines with the help of scalar complementary geodesic distance field and compensate gap-like artifacts based on local morphological information. We validated the improved method on twenty colon cases via two widely used VU techniques, the ray-casting technique and the conformal-mapping technique. Experimental results indicated that with the use of the improved method, the rates of correct response via ray-casting and conformal-mapping techniques were respectively elevated by 14.9% and 13.1%, while the rates of false response were respectively reduced by 8.4% and 10.8%.

Resumo Limpo

techniqu virtual colon unfold vu noninvas procedur detect polyp colon inner wall compar convent virtual colonoscopi vu faster result fewer uninspect region howev perform vu vulner qualiti colon segment paper improv colon segment method propos enhanc perform vu improv method use novel postprocess scheme compos two part attain accur centerlin help scalar complementari geodes distanc field compens gaplik artifact base local morpholog inform valid improv method twenti colon case via two wide use vu techniqu raycast techniqu conformalmap techniqu experiment result indic use improv method rate correct respons via raycast conformalmap techniqu respect elev rate fals respons respect reduc

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