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Effect of visualization display colour on polyp conspicuity at virtual colonoscopy
1Intestinal Imaging Centre, St Mark's Hospital, Harrow, Middlesex, UK. burlingdavid@yahoo.co.uk
Clinical Radiology
|August 23, 2008
Summary
Display color minimally impacts polyp detection during virtual colonoscopy (VC). While green displays should be avoided, most colors show no significant difference in identifying polyps, including large vs. medium sizes.
Area of Science:
- Gastroenterology
- Medical Imaging
- Computer Science
Background:
- Virtual colonoscopy (VC) is an imaging technique for colorectal polyp detection.
- Three-dimensional (3D) displays enhance visualization during VC.
- Display color may influence the accuracy of polyp detection.
Purpose of the Study:
- To evaluate the impact of different background display colors on polyp detection rates in 3D virtual colonoscopy.
- To determine if specific colors improve or hinder the identification of colorectal polyps.
Main Methods:
- Five experienced observers reviewed 750 3D endoluminal images of virtual colonoscopy.
- Images were presented in brief flashes (0.2s) across six different display colors.
- Polyp detection rates and observer agreement were analyzed using logistic regression and kappa statistics, stratified by polyp size.
Main Results:
- Overall polyp detection rates ranged from 75-94% across observers.
- No statistically significant difference in polyp detection was found between the six display colors (p=0.11).
- Larger polyps were detected more often than medium-sized ones, irrespective of display color.
Conclusions:
- Background display color has a minimal effect on polyp detection during virtual colonoscopy.
- The green display color should be avoided for optimal polyp detection.
- Display color does not significantly affect the detection of large versus medium polyps.
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