Abstract
Purpose
To evaluate whether supine or prone positioning improves pelvicalyceal and ureteral
opacification at multi-detector row computed tomographic (CT) urography.
Methods
We retrospectively reviewed the CT urograms of 114 consecutive patients performed
for hematuria. Using a “split-bolus” technique, all patients were imaged 340 s after
the injection of intravenous contrast, 63 in the supine and 51 in the prone position.
The right and left pelvicalyceal systems and ureters were divided into six segments:
anterior calyces, posterior calyces, renal pelvis, proximal ureter, mid ureter, and
distal ureter. Two readers rated the opacification of each segment in consensus on
a four-point scale from 0 (no opacification) to 3 (excellent opacification). Opacification
scores were compared between supine and prone CT urograms using generalized estimating
equation models.
Results
Supine positioning resulted in higher opacification scores of the renal pelvis and
the posterior calyces than prone positioning (P<.01). Prone positioning resulted in higher opacification scores of the anterior calyces
only (P<.01). No significant differences were seen between the supine and prone opacification
scores for the proximal, mid, or distal ureters (P values all >.5).
Conclusion
Supine positioning results in overall greater opacification of the pelvicalyceal system
compared to prone positioning at CT urography.
Keywords
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Article info
Publication history
Published online: July 23, 2009
Accepted:
December 20,
2007
Received:
November 1,
2007
Identification
Copyright
© 2009 Published by Elsevier Inc.
