Comparison of Virtual Cystoscopy, Multiplanar Reformation, and Source CT Images with Contrast Material-Filled Bladder for Detecting Lesions
Jeong Kon Kim1,
Soo-Youn Park1,
Ho Sung Kim1,
Soo Hyun Kim2 and
Kyoung-Sik Cho1
1 Department of Radiology, Asan Medical Center, University of Ulsan, 388-1
Poongnap-dong, Songpa-gu, Seoul 138-736, South Korea.
2 Department of Radiology, Inje University, Sanggyepaik Hospital, 761-1
Sanggye-7 dong, Nowon-gu, Seoul 139-707, South Korea.
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Fig. 1A —70-year-old man with transitional cell carcinoma at inferior
site of bladder. Virtual cystoscopy image obtained toward inferior wall of
bladder (A) shows polypoid mass (arrows). This lesion
(arrows) is also identified on sagittal (B) and coronal
(C) reformatted images and transverse CT image (D). This lesion
was detected by both first and second observers.
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Fig. 1B —70-year-old man with transitional cell carcinoma at inferior
site of bladder. Virtual cystoscopy image obtained toward inferior wall of
bladder (A) shows polypoid mass (arrows). This lesion
(arrows) is also identified on sagittal (B) and coronal
(C) reformatted images and transverse CT image (D). This lesion
was detected by both first and second observers.
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Fig. 1C —70-year-old man with transitional cell carcinoma at inferior
site of bladder. Virtual cystoscopy image obtained toward inferior wall of
bladder (A) shows polypoid mass (arrows). This lesion
(arrows) is also identified on sagittal (B) and coronal
(C) reformatted images and transverse CT image (D). This lesion
was detected by both first and second observers.
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Fig. 1D —70-year-old man with transitional cell carcinoma at inferior
site of bladder. Virtual cystoscopy image obtained toward inferior wall of
bladder (A) shows polypoid mass (arrows). This lesion
(arrows) is also identified on sagittal (B) and coronal
(C) reformatted images and transverse CT image (D). This lesion
was detected by both first and second observers.
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Fig. 2A —67-year-old man with transitional cell carcinoma at right
site of bladder. First observer identified focal surface irregularity
(arrows, A) on virtual cystoscopy image (A) obtained
toward right wall of bladder, but second observer could not detect this
lesion. On both coronal reformatted image (B) and transverse CT image
(C), both observers could not detect lesion.
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Fig. 2B —67-year-old man with transitional cell carcinoma at right
site of bladder. First observer identified focal surface irregularity
(arrows, A) on virtual cystoscopy image (A) obtained
toward right wall of bladder, but second observer could not detect this
lesion. On both coronal reformatted image (B) and transverse CT image
(C), both observers could not detect lesion.
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Fig. 2C —67-year-old man with transitional cell carcinoma at right
site of bladder. First observer identified focal surface irregularity
(arrows, A) on virtual cystoscopy image (A) obtained
toward right wall of bladder, but second observer could not detect this
lesion. On both coronal reformatted image (B) and transverse CT image
(C), both observers could not detect lesion.
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Fig. 3A —60-year-old man with transitional cell carcinoma at anterior
site of bladder. Virtual cystoscopy image obtained toward anterior wall of
bladder (A) shows polypoid lesion (arrowhead, A) that
was identified by both first and second observers. However, this lesion was
not detected on sagittal reformatted image (B) or transverse CT image
(C) by either observer.
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Fig. 3B —60-year-old man with transitional cell carcinoma at anterior
site of bladder. Virtual cystoscopy image obtained toward anterior wall of
bladder (A) shows polypoid lesion (arrowhead, A) that
was identified by both first and second observers. However, this lesion was
not detected on sagittal reformatted image (B) or transverse CT image
(C) by either observer.
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Fig. 3C —60-year-old man with transitional cell carcinoma at anterior
site of bladder. Virtual cystoscopy image obtained toward anterior wall of
bladder (A) shows polypoid lesion (arrowhead, A) that
was identified by both first and second observers. However, this lesion was
not detected on sagittal reformatted image (B) or transverse CT image
(C) by either observer.
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Fig. 4A —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.
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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.
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Copyright © 2005 by the American Roentgen Ray Society.
