Intra-patient Prone to Supine Colon Registration for Synchronized Virtual Colonoscopy

Intra-Patient Supine-Prone Colon Registration in CT Colonography Using Shape Spectrum

CT colonography (CTC) is a minimally invasive screening technique for colorectal polyps and colon cancer. Since electronic colon cleansing (ECC) cannot completely remove the presence of pseudo-polyps, most CTC protocols acquire both prone and supine images to improve the visualization of the lumen wall and to reduce false positives. Comparisons between the prone and supine images can be facilit...

Conformal Geometry Based Supine and Prone Colon Registration

In virtual colonoscopy, CT scans are typically acquired with the patient in both supine and prone positions. The registration of these two scans is desirable so that the physician can clarify situations or confirm polyp findings at a location in one scan with the same location in the other, thereby improving polyp detection rates and reducing false positives. However, this supine-prone registra...

Detection of Colonic Landmarks for Supine-Prone Registration

In virtual colonoscopy, a patient is scanned in both supine and prone positions. However, since the shape of the colon changes substantially, it is necessary to find a good registration between the two scans to help the physician with better polyp detection and to reduce the false positives. To obtain a registration, anatomical features are needed. We use anatomical landmarks to have the necess...

CT colonography: Accurate registration of prone and supine endoluminal surfaces of the colon

Deformable Registration of Supine and Prone Colons for CT Colonography

CT colonography (CTC) is a minimally invasive screening technique for colorectal polyps and colon cancer. Most CTC protocols acquire both prone and supine images to improve the visualization of the lumen wall, reduce false positives, and improve sensitivity. Comparisons between the prone and supine images can be facilitated by computerized registration between the scans. In this paper, an algor...