title: Value of Virtual Colonoscopy with 64 Row CT in Evaluation of Colorectal Cancer.
abstract: BACKGROUND
  Virtual colonoscopy (VC) enables three-dimensional view of walls and internal lumen of the colon as a result of reconstruction of multislice CT images. The role of VC in diagnosis of the colon abnormalities systematically increases, and in many medical centers all over the world is carried out as a screening test of patients with high risk of colorectal cancer.
  
  
  METHODS
  We analyzed results of virtual colonoscopy of 360 patients with clinical suspicion of colorectal cancer. Sensitivity and specificity of CT colonoscopy for detection of colon cancers and polyps were assessed.
  
  
  RESULTS
  Results of our research have shown high diagnostic efficiency of CT colonoscopy in detection of focal lesions in large intestine of 10 mm or more diameter. Sensitivity was 85.7%, specificity 89.2%.
  
  
  CONCLUSIONS
  Virtual colonoscopy is noninvasive and well tolerated by patients imaging method, which permits for early detection of the large intestine lesions with specificity and sensitivity similar to classical colonoscopy in screening exams in patients suspected for colorectal cancer. Good preparation of the patients for the examination is very important for proper diagnosis and interpretation of this imaginge procedure.
authors.affiliation: Department of Radiology, Wrocław University of Medicine, Wrocław, Poland.
authors.forename: Urszula
authors.initials: U
authors.lastname: Zaleska-Dorobisz
authors.affiliation: Department of Radiology, Wrocław University of Medicine, Wrocław, Poland.
authors.forename: Mateusz
authors.initials: M
authors.lastname: Lasecki
authors.affiliation: Department of Radiology, Wrocław University of Medicine, Wrocław, Poland.
authors.forename: Ewa
authors.initials: E
authors.lastname: Nienartowicz
authors.affiliation: Department of Gastroenterology, MCZ, Lubin, Poland.
authors.forename: Joanna
authors.initials: J
authors.lastname: Pelak
authors.affiliation: Department of Radiology, Wrocław University of Medicine, Wrocław, Poland.
authors.forename: Joanna
authors.initials: J
authors.lastname: Słonina
authors.affiliation: Department of Radiology, Wrocław University of Medicine, Wrocław, Poland.
authors.forename: Cyprian
authors.initials: C
authors.lastname: Olchowy
authors.affiliation: Department of Gastroenterology, MCZ, Lubin, Poland.
authors.forename: Marek
authors.initials: M
authors.lastname: Scieżka
authors.affiliation: Department of Radiology, Wrocław University of Medicine, Wrocław, Poland.
authors.forename: Marek
authors.initials: M
authors.lastname: Sąsiadek
keywords: Colonic Neoplasms; Colonography; Colonoscopes; Computed Tomographic