Computer-aided diagnosis (CAD) systems are software algorithms designed to assist radiologists (or other practitioners) in solving a diagnostic problem by using a visual prompt (or "CAD mark") to direct the observer towards potential pathology. CT colonography is a recent arrival to CAD, but could represent one of its most fruitful applications in the future. In contrast to other organs, where ...

A 61 year-old asymptomatic male was included in the colorectal cancer screening programme. As fecal occult blood tests were positive, a colonoscopy was carried out, but the examination was not complete due to low tolerance to the procedure. Following the established protocol in our center a colonography by computed tomography (CT-colonography) was made. Colonic lesions were not observed but mul...

Portomesenteric vein gas can occur owing to a variety of interraleted factors such as loss of mucosal integrity and intraluminal overpressure, and the most common and serious cause is bowel ischemia, which requires urgent laparotomy. Nevertheless, when portal venous gas is caused by nonischemic causes, surgery is not required and it can be treated conservatively. So, its features should be care...