Abstract
Purpose: We determine the value of color mapping of bladder wall thickness for detection of tumor as a component of virtual cystoscopy. Materials and Methods: A total of 31 subjects with hematuria and/or a history of bladder tumor underwent helical computerized tomography of the pelvis after distention of the bladder with air. Three-dimensional (D) models were constructed, and thickness of the wall was color mapped according to a fixed and validated mm. scale. Axial source images and 3-D models were reviewed and graded for the presence of wall thickening. A comparison was made with findings on conventional cystoscopy in 31 patients and pathological specimen in 13. Results: Compared with conventional cystoscopy, the analysis of axial image yielded a sensitivity of 0.80, specificity 0.90, positive predictive value 0.80 and negative predictive value 0.90 for the presence of tumor. Examination of color mapped 3-D renderings resulted in 0.83, 0.36, 0.42 and 0.71, respectively. Conclusions: Thin axial computerized tomography of the air distended bladder shows promise as a potential screening tool for bladder cancer. The low specificity of color mapped 3-D renderings makes the technique inappropriate for screening. It may valuable for guiding urologists to additional suspicious sites in a patient with a known tumor.
Original language | English (US) |
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Pages (from-to) | 559-562 |
Number of pages | 4 |
Journal | Journal of Urology |
Volume | 167 |
Issue number | 2 I |
DOIs | |
State | Published - 2002 |
Keywords
- Bladder
- Bladder neoplasms
- Data display
- Diagnosis
- Tomography scanners x-ray computed
ASJC Scopus subject areas
- Urology