Current Issues in Computed Tomography Colonography.

Area of Science:

• Gastroenterology
• Radiology
• Medical Imaging

Background:

• Computed tomography colonography (CTC) has emerged as a primary alternative to optical colonoscopy over the last two decades.
• Its accuracy for detecting colonic neoplasia, particularly cancers and larger polyps, is comparable to optical colonoscopy when performed and reported with high quality.

Purpose of the Study:

• To discuss the essential components of a high-quality computed tomography colonography examination.
• To review the supporting clinical trial data validating the efficacy of CTC.
• To explore the application of CTC for nonneoplastic colonic conditions and future imaging modalities.

Main Methods:

• Review of current best practices for bowel preparation and colonic distension in CTC.
• Analysis of key clinical trial data demonstrating the diagnostic accuracy of CTC.
• Discussion of CTC's utility in diagnosing nonneoplastic colonic pathology.

Main Results:

• High-quality CTC demonstrates accuracy comparable to optical colonoscopy for detecting colorectal cancers and large polyps.
• Contemporary techniques in bowel preparation and distension are crucial for optimal CTC performance.
• CTC is also valuable for evaluating nonneoplastic colonic diseases.

Conclusions:

• Computed tomography colonography is a validated and accurate tool for colonic neoplasia detection.
• Advancements in CTC technique and emerging technologies like magnetic resonance colonography and wireless capsule imaging promise further improvements in colorectal cancer screening and diagnosis.