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By Thomas E. Hampshire, Holger R. Roth, Darren J. Boone, Greg Slabaugh, Steve Halligan (auth.), Hiroyuki Yoshida, David Hawkes, Michael W. Vannier (eds.)

This booklet constitutes the refereed complaints of the overseas Workshop CCAAI 2012, held in great, France, in October 2012. The publication contains 31 papers that have been rigorously reviewed and chosen from 37 submissions. the entire authorized papers have been revised by means of incorporating of the reviewers’ reviews and re-submitted by means of the authors to be integrated during this complaints quantity. The papers are prepared into topical sections on colon and different gastrointestinal tract; and liver, kidney, and different organs.

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Additional info for Abdominal Imaging. Computational and Clinical Applications: 4th International Workshop, Held in Conjunction with MICCAI 2012, Nice, France, October 1, 2012. Proceedings

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The pipeline was tested by 14 patient datasets with comparison to our previous work. Keywords: Flattening, conformal mapping, homotopy, Ricci flow, virtual colonoscopy. , the cecum) of the small intestine, and (2) to visualize the colon mucosal surface by endoscopic views on a screen [7,8]. The procedure has shown the potential to screen colonic polyps and detect colon diseases, including diverticulosis and cancer [14]. Traditional paradigm in VC employs X-ray computed tomography or computed tomography colonography (CTC) to achieve the tasks of screening and detection due to the high speed of CT scanning and high contrast between colon wall and colon lumen filled by CO2 or air in CT images.

C Springer-Verlag Berlin Heidelberg 2012 Computer-Aided Detection for Ultra-Low-Dose CT Colonography 41 Tube current is one of the principal sources of ionizing radiation in CTC. Studies have suggested that a reduction in tube current might not have a significant effect on polyp detection in CTC [3]. Therefore, it may be possible to perform ultra-low-dose (ULD) CTC. 0 mSv of the normal background radiation exposure in the United States [18]. However, the use of ULD CTC can distort the observed colon surface and lesions (Fig.

Conformal Flattening CTC data MAP-EM Denoise (Old Method) Marching Cube Smoothing Denoise (New Method) Conformal 2D Mesh Flattening Fig. 1. Pipeline for our previous and current methods 3 Theoretic Background This section briefly introduces elementary theories of surface topology and surface Ricci Flow. 1 Homotopy Basis Definition 1 (Homotopy). Two continuous maps f0 , f1 : M → N are said to be homotopic if there is a continuous map f : M × I → N such that F(·, 0) = f0 and F(·, 1) = f1 . The map F is called a homotopy[12] between f0 and f1 , denoted as f0 ∼ = f1 .

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