title: Reproducibility of human kidney perfusion and volume determinations with electron beam computed tomography.
abstract: OBJECTIVE
  Alterations in whole kidney, cortical, and medullary perfusion and volume play a pivotal role in various physiologic and pathophysiologic processes. Electron-beam computed tomography (EBCT) provides accurate measurements of these traits in animals, but their reproducibility in humans has not been established.
  
  
  METHODS
  Perfusion, volume, and flow measurements were obtained by EBCT in eight healthy human volunteers under controlled conditions on two consecutive days.
  
  
  RESULTS
  Mean values for whole kidney, cortical, and medullary perfusion and volume obtained with EBCT were similar in scan 1 and scan 2 (P > 0.1), and correlated highly. Coefficients of variation for the repeated measurements usually were less than 10%. Values obtained for renal regional perfusion and volume agreed with previously reported values.
  
  
  CONCLUSIONS
  Electron-beam computed tomography estimates of single whole kidney, cortical, and medullary perfusions and volumes are highly reproducible in normal humans, and may be useful to advance understanding of renal involvement in human disease.
authors.affiliation: Department of Physiology and Biophysics, Mayo Clinic and Foundation, Rochester, Minnesota 55905, USA.
authors.forename: L O
authors.initials: LO
authors.lastname: Lerman
authors.forename: A L
authors.initials: AL
authors.lastname: Flickinger
authors.forename: P F
authors.initials: PF
authors.lastname: Sheedy
authors.forename: S T
authors.initials: ST
authors.lastname: Turner
mesh_terms: D000328:Adult; D003287:Contrast Media; D004032:Diet; D005260:Female; D006801:Humans; D007479:Iopamidol; D007668:Kidney / Q000098:blood supply / Q000000981:diagnostic imaging*; D008297:Male; D012016:Reference Values; D012079:Renal Circulation / Q000502:physiology; D015203:Reproducibility of Results; D013997:Time Factors; D014057:Tomography, X-Ray Computed / Q000379:methods*
chemical_list: D003287:Contrast Media; D007479:Iopamidol