Power Doppler imaging in acute renal vein occlusion and recanalization: a canine model.
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.
Yoo
So-Young
SY
Department of Radiology, Seoul National University College of Medicine, Seoul, Korea. kimio@radcom.snu.ac.kr.
Kim
In-One
IO
Kim
Young-Il
YI
Lee
Kyoung Ho
KH
Lee
Min Woo
MW
Youn
Byung Jae
BJ
Kim
Woo Sun
WS
Yeon
Kyung Mo
KM
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