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Published on: June 21, 2024
Renal cyst pseudoenhancement at 16- and 64-dector row MDCT
Victor Sai1, Rebecca Rakow-Penner, Benjamin M Yeh
1Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, CA 94143-0628, USA.
Objective:
To evaluate the presence of renal cyst pseudoenhancement at 16- and 64-row multidetector computed tomography (MDCT) in patients.
Methods:
MDCT images from 90 patients with renal cysts >1 cm in diameter (n=122) were retrospectively analyzed for the presence and predictors of cyst pseudoenhancement.
Results:
Fifty-three percent of cysts 1-2 cm demonstrated pseudoenhancement (ranged from 11 to 35 HU). Cyst pseudoenhancement was more pronounced when imaged with 64-row CTs compared to 16-row CT. Cyst size, postcontrast renal parenchymal density, and number of scanner detector rows were independent predictors of pseudoenhancement.
Conclusion:
Pseudoenhancement occurs most frequently in patients with renal cysts <2 cm imaged with 64-detector-row MDCT.
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