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Fig. 4B —48-year-old man with normal bladder in conventional
cystoscopic examination. Both observers noted polypoid mass
(arrowheads, A) on virtual cystoscopic image (A)
obtained toward superior wall of bladder. However, on both reformatted image
(B) and transverse CT image (not shown), both observers interpreted
that bladder was normal. Coronal reformatted image (B) shows
indentation of bladder dome by small bowel (arrows, B), which
is suggested to cause false-positive lesion on virtual cystoscopy.
