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Updated: Jun 25, 2026

Structured Approach to Colonoscopy Technique Optimization: A Single-Center Experience with Novice Endoscopists
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Published on: July 11, 2025

CT colonography polyp matching: differences between experienced readers.

Marjolein H Liedenbaum1, Ayso H de Vries, Steve Halligan

  • 1Department of Radiology, Academic Medical Center, Meibergdreef 9, 1105, AZ, Amsterdam, Netherlands. m.h.liedenbaum@amc.uva.nl

European Radiology
|February 19, 2009
PubMed
Summary
This summary is machine-generated.

Experienced readers show considerable agreement when matching polyps between CT colonography (CTC) and optical colonoscopy (OC). However, some disagreement exists, potentially due to perceived size differences in polyps between the two imaging methods.

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Last Updated: Jun 25, 2026

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E-Patient Counseling Trial (E-PACO): Computer Based Education versus Nurse Counseling for Patients to Prepare for Colonoscopy
06:28

E-Patient Counseling Trial (E-PACO): Computer Based Education versus Nurse Counseling for Patients to Prepare for Colonoscopy

Published on: August 1, 2019

Area of Science:

  • Medical Imaging
  • Gastroenterology
  • Radiology

Background:

  • Accurate polyp detection and matching between CT colonography (CTC) and optical colonoscopy (OC) are crucial for effective colorectal cancer screening and surveillance.
  • Discrepancies in polyp matching can lead to under- or over-treatment, impacting patient management.

Purpose of the Study:

  • To evaluate the agreement among experienced readers in matching polyps identified by CTC and OC.
  • To investigate the reasons contributing to disagreements in polyp matching between these two diagnostic modalities.

Main Methods:

  • Eight experienced CTC readers reviewed 28 CTC cases with corresponding OC findings.
  • Cases included single and multiple polyps, with varying adherence to standard matching criteria.
  • Reader agreement was analyzed for polyp matching between CTC and OC datasets.

Main Results:

  • For single-polyp cases, reader agreement varied, with 71% showing near-complete agreement and 29% exhibiting substantial discrepancy, possibly due to perceived size differences.
  • In cases with multiple polyps, readers successfully matched a significant proportion of CTC-detected polyps to OC findings (71%-92%).

Conclusions:

  • Experienced readers demonstrate substantial agreement in matching polyps between CTC and OC.
  • Non-negligible disagreement persists, highlighting the need for standardized protocols and further investigation into factors influencing polyp size perception across modalities.