title: Renal cyst pseudoenhancement at 16- and 64-dector row MDCT.
abstract: 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.
  
  
  CONCLUSIONS
  Pseudoenhancement occurs most frequently in patients with renal cysts <2 cm imaged with 64-detector-row MDCT.
authors.affiliation: Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, CA 94143-0628, USA.
authors.forename: Victor
authors.initials: V
authors.lastname: Sai
authors.forename: Rebecca
authors.initials: R
authors.lastname: Rakow-Penner
authors.forename: Benjamin M
authors.initials: BM
authors.lastname: Yeh
authors.forename: Fergus V
authors.initials: FV
authors.lastname: Coakley
authors.forename: Antonio C
authors.initials: AC
authors.lastname: Westphalen
authors.forename: Emma M
authors.initials: EM
authors.lastname: Webb
authors.forename: Zhen J
authors.initials: ZJ
authors.lastname: Wang
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D052177:Kidney Diseases, Cystic / Q000000981:diagnostic imaging* / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D011856:Radiographic Image Enhancement / Q000379:methods*; D015203:Reproducibility of Results; D018570:Risk Assessment; D012495:San Francisco / Q000453:epidemiology; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods* / Q000706:statistics & numerical data*