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Review
. 2010 Apr;20(2):245-57.
doi: 10.1016/j.giec.2010.02.004.

Improving the accuracy of CTC interpretation: computer-aided detection

Ronald M Summers  1
Affiliations
Review

Improving the accuracy of CTC interpretation: computer-aided detection

Ronald M Summers. Gastrointest Endosc Clin N Am. 2010 Apr.

Abstract

Computer-aided polyp detection aims to improve the accuracy of the colonography interpretation. The computer searches the colonic wall to look for polyplike protrusions and presents a list of suspicious areas to a physician for further analysis. Computer-aided polyp detection has developed rapidly in the past decade in the laboratory setting and has sensitivities comparable with those of experts. Computer-aided polyp detection tends to help inexperienced readers more than experienced ones and may also lead to small reductions in specificity. In its currently proposed use as an adjunct to standard image interpretation, computer-aided polyp detection serves as a spellchecker rather than an efficiency enhancer.

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Conflict of interest statement

Potential financial interest.

The author has pending and/or awarded patents and receives royalty income from iCAD Medical. His laboratory received free research software from Viatronix and receives research support from iCAD Medical.

Figures

Figure 1
Figure 1
Simplified schematic of three CAD reading paradigms. Horizontal bars (clear, gray, solid) represent CTC images. Clear bar indicates image has no CAD marks and is not reviewed by reader. Gray bar indicates image has CAD marks and is reviewed by reader. Black bar indicates image has no CAD marks and is reviewed by reader. In first reader mode, reader only reviews images with CAD marks. In concurrent reader mode, CAD marks are present during the reader’s first pass through all the images. In second reader mode, all images are reviewed first without CAD marks, then reader reviews only images with CAD marks to arrive at final diagnosis.
Figure 2
Figure 2
Rectal 7 mm adenomatous polyp (short white arrow) initially missed by four readers but found by three of the readers after the use of CAD in the second reader mode. CAD prompts (pink indicator in A, rectangle in B) and rectal tube (long white arrows) are indicated. The polyp may have been missed initially because it was partially hidden behind the rectal tube. Reprinted from Ref. .
See this image and copyright information in PMC

References

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    1. Summers RM. Chapter 23: How Perceptual Factors Affect the Use and Accuracy of CAD for Interpretation of CT Images. In: Samei E, Krupinski E, editors. The handbook of medical image perception and techniques. Cambridge; 2009. pp. 313–321.

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