title: Power Doppler imaging in acute renal vein occlusion and recanalization: a canine model.
abstract: OBJECTIVE
  To evaluate the dynamic changes of the power Doppler (PD) in acute renal vein occlusion and recanalization in a canine model.
  
  
  METHODS
  We performed a PD of the kidney during graded renal vein occlusion and recanalization induced by balloon inflation and deflation in nine dogs. The PD images were transferred to a personal computer, and the PD signals were quantified.
  
  
  RESULTS
  We observed the temporal change of the PD signal during renal vein occlusion and recanalization, with a decrease in the PD signal during occlusion and an increase during recanalization. The mean PD signal decreased gradually as the renal vein was occluded, and conversely increased gradually with sequential relief of occlusion. The sequential change of the mean value of the PD signal was statistically significant.
  
  
  CONCLUSIONS
  The PD can detect a change in renal blood flow during acute renal vein occlusion and recanalization in a canine model. The PD may be used as a helpful tool for the early detection of acute renal vein thrombosis and the monitoring of renal perfusion.
authors.affiliation: Department of Radiology, Seoul National University College of Medicine, Seoul, Korea. kimio@radcom.snu.ac.kr.
authors.forename: So-Young
authors.initials: SY
authors.lastname: Yoo
authors.forename: In-One
authors.initials: IO
authors.lastname: Kim
authors.forename: Young-Il
authors.initials: YI
authors.lastname: Kim
authors.forename: Kyoung Ho
authors.initials: KH
authors.lastname: Lee
authors.forename: Min Woo
authors.initials: MW
authors.lastname: Lee
authors.forename: Byung Jae
authors.initials: BJ
authors.lastname: Youn
authors.forename: Woo Sun
authors.initials: WS
authors.lastname: Kim
authors.forename: Kyung Mo
authors.initials: KM
authors.lastname: Yeon
mesh_terms: D000208:Acute Disease; D000818:Animals; D021721:Balloon Occlusion; D001783:Blood Flow Velocity; D002404:Catheterization; D004195:Disease Models, Animal; D004285:Dogs; D007091:Image Processing, Computer-Assisted; D007668:Kidney / Q000098:blood supply* / Q000000981:diagnostic imaging; D012082:Renal Veins / Q000000981:diagnostic imaging*; D018608:Ultrasonography, Doppler