A lumen tracking method and system automatically extracts a colon from CT image data by locating landmarks in the image data, based on known anatomic features or other predictable features. If the colon is segmented, the method and system may use the landmarks to evaluate candidate segments for inclusion...http://www.google.es/patents/US7809177?utm_source=gb-gplus-sharePatente US7809177 - Lumen tracking in computed tomographic images
