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Fig. 3B —Performance of 3D CT colonography in detection of adenomas 8 mm or
larger in Department of Defense CT colonography screening trial
[1]. Bar graphs show
sensitivity (green) and specificity (blue) at 8-mm size
threshold according to temporal quarter (Qtr) of trial (A) and study
site (B). Uniform performance characteristics range from 91% to 95% in
all cases. That most radiologists in study were not based at academic medical
centers and had relatively little experience (25-50 of fewer CT colonography
cases) suggests that learning curve with primary 3D polyp detection is much
simpler than that for primary 2D approach. Site 1 = National Naval Medical
Center, site 2 = Naval Medical Center San Diego, site 3 = Walter Reed Army
Medical Center.
