Tags

Type your tag names separated by a space and hit enter

Computed tomographic colonography (Virtual colonoscopy): a new method for detecting colorectal neoplasms.
Endoscopy. 1997 Aug; 29(6):454-61.E

Abstract

Computed tomographic (CT) colonography is an exciting new technique that uses volumetric CT data combined with advanced imaging software to create two-dimensional and three-dimensional images of the colon. The technique uses both three-dimensional images that simulate the endoluminal perspective of the colonoscope, as well as axial and reformatted two-dimensional images. The two-dimensional and three-dimensional images are complementary, and in combination offer the most robust performance for the detection of colorectal polyps. Currently, CT colonographic examinations are performed in the fully cleansed and air-inflated colon using a slice thickness of 5 mm, a reconstruction interval of 3 mm, a pitch of 1.3, and 70 mA. In a blinded, prospective study of 70 patients (half with a known lesion, and half from a surveillance population with a low disease prevalence) the sensitivity for the detection of polyps of 1 cm or more is 75%, and the specificity is 90%. The most commonly encountered problems include retained colonic fluid and stool, suboptimally distended colonic segments, and long interpretation times. Many of these problems can be solved using both supine and prone imaging. It is expected that the performance of this examination will improve, and that a new era of colorectal screening will begin.

Authors+Show Affiliations

Dept. of Diagnostic Radiology, Mayo Clinic, Rochester, Minnesota, USA.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Review

Language

eng

PubMed ID

9342563

Citation

Johnson, C D., et al. "Computed Tomographic Colonography (Virtual Colonoscopy): a New Method for Detecting Colorectal Neoplasms." Endoscopy, vol. 29, no. 6, 1997, pp. 454-61.
Johnson CD, Hara AK, Reed JE. Computed tomographic colonography (Virtual colonoscopy): a new method for detecting colorectal neoplasms. Endoscopy. 1997;29(6):454-61.
Johnson, C. D., Hara, A. K., & Reed, J. E. (1997). Computed tomographic colonography (Virtual colonoscopy): a new method for detecting colorectal neoplasms. Endoscopy, 29(6), 454-61.
Johnson CD, Hara AK, Reed JE. Computed Tomographic Colonography (Virtual Colonoscopy): a New Method for Detecting Colorectal Neoplasms. Endoscopy. 1997;29(6):454-61. PubMed PMID: 9342563.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Computed tomographic colonography (Virtual colonoscopy): a new method for detecting colorectal neoplasms. AU - Johnson,C D, AU - Hara,A K, AU - Reed,J E, PY - 1997/8/1/pubmed PY - 1997/10/29/medline PY - 1997/8/1/entrez SP - 454 EP - 61 JF - Endoscopy JO - Endoscopy VL - 29 IS - 6 N2 - Computed tomographic (CT) colonography is an exciting new technique that uses volumetric CT data combined with advanced imaging software to create two-dimensional and three-dimensional images of the colon. The technique uses both three-dimensional images that simulate the endoluminal perspective of the colonoscope, as well as axial and reformatted two-dimensional images. The two-dimensional and three-dimensional images are complementary, and in combination offer the most robust performance for the detection of colorectal polyps. Currently, CT colonographic examinations are performed in the fully cleansed and air-inflated colon using a slice thickness of 5 mm, a reconstruction interval of 3 mm, a pitch of 1.3, and 70 mA. In a blinded, prospective study of 70 patients (half with a known lesion, and half from a surveillance population with a low disease prevalence) the sensitivity for the detection of polyps of 1 cm or more is 75%, and the specificity is 90%. The most commonly encountered problems include retained colonic fluid and stool, suboptimally distended colonic segments, and long interpretation times. Many of these problems can be solved using both supine and prone imaging. It is expected that the performance of this examination will improve, and that a new era of colorectal screening will begin. SN - 0013-726X UR - https://www.unboundmedicine.com/medline/citation/9342563/Computed_tomographic_colonography__Virtual_colonoscopy_:_a_new_method_for_detecting_colorectal_neoplasms_ L2 - http://www.thieme-connect.com/DOI/DOI?10.1055/s-2007-1004250 DB - PRIME DP - Unbound Medicine ER -