Noninvasive method using multidetector CT for calculating the relative blood supply ratio of duplicated renal arteries in renal donors.
OBJECTIVE
The aim of this study was to evaluate the correlation between the renal artery cross-sectional area measured by multidetector computed tomography (MDCT) and the nephrogram area calculated by renal arteriography in potential living renal donors with duplicated renal arteries.


METHODS
Medical records of 18 patients with duplicated renal arteries who underwent both MDCT angiography and renal arteriography between 2001 and 2003 were retrospectively reviewed. All 20 kidneys were evaluated. Renal artery cross-sectional areas were measured using the workstation to which the CT data were transferred; the nephrogram areas on the digitized angiographic images were calculated using public domain software. Bland-Altman analysis was performed to compare the cross-sectional area ratio of the accessory arteries to the main renal arteries, with the ratios obtained from the nephrogram areas calculated from the arteriograms.


RESULTS
The mean cross-sectional areas of the accessory and main renal arteries were 6.78 and 20.9 mm2, respectively. The ratio of the nephrogram areas calculated from the arteriograms ranged from 0.094 to 0.809. Bland-Altman analysis showed no significant difference.


CONCLUSIONS
It is possible to predict the supply volume of accessory renal arteries by measuring the cross-sectional area of the accessory and main renal arteries in potential living renal donors.
Kuwabara
Masatomo
M
Department of Diagnostic and Interventional Radiology, Osaka University Medical School, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan. mkuwabara@radiol.med.osaka-u.ac.jp
Narumi
Yoshifumi
Y
Takahashi
Satoru
S
Sato
Yoshinobu
Y
Kim
Tonsok
T
Murakami
Takamichi
T
Nakamura
Hironobu
H
D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007668:Kidney / Q000000981:diagnostic imaging; D016030:Kidney Transplantation; D019520:Living Donors; D008297:Male; D008875:Middle Aged; D012077:Renal Artery / Q000002:abnormalities* / Q000000981:diagnostic imaging*; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed / Q000379:methods*