Selective intra-arterial 3-dimensional computed tomography angiography for preoperative evaluation of nephron-sparing surgery.
OBJECTIVE
To evaluate selective intra-arterial 3-dimensional computed tomography (3D-CT) angiography as a tool for the preoperative evaluation of nephron-sparing surgery (NSS).


METHODS
Twenty-three patients with renal cell carcinoma indicating NSS underwent selective intrarenal 3D-CT angiography. The time-lapse dual-phase technique was used for simultaneous vascular and urographic visualization. The 3D images were created by the shaded volume-rendering method. The CT attenuation of target structures was measured for quantitative evaluation. The 3D images were visually evaluated for the renal artery, vein, and collecting system using a grading system. Results were statistically analyzed.


RESULTS
The 3D-CT angiography depicted the intrarenal branches of the renal artery and vein and the whole collecting system in most patients. Visualization of the renal artery was significantly correlated to its CT attenuation. Visualization of the renal vein was correlated to its CT attenuation adjusted by the surrounding renal parenchyma.


CONCLUSIONS
Selective intra-arterial 3D-CT angiography allows the detailed visualization of intrarenal structures.
Ueda
Takuya
T
Department of Radiology, Graduate School of Medicine, Chiba University, Chiba, Japan. takueda@faculty.chiba-u.jp
Tobe
Toyofusa
T
Yamamoto
Seiji
S
Motoori
Ken
K
Murakami
Yoshitaka
Y
Igarashi
Tatsuo
T
Ito
Hisao
H
D000328:Adult; D000368:Aged; D000704:Analysis of Variance; D000792:Angiography / Q000379:methods*; D002292:Carcinoma, Renal Cell / Q000601:surgery; D003287:Contrast Media / Q000008:administration & dosage; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional / Q000379:methods*; D007269:Injections, Intra-Arterial; D007680:Kidney Neoplasms / Q000601:surgery; D007685:Kidney Tubules, Collecting / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D009399:Nephrons / Q000000981:diagnostic imaging* / Q000601:surgery; D010347:Patient Care Planning; D011300:Preoperative Care; D011446:Prospective Studies; D011856:Radiographic Image Enhancement; D012077:Renal Artery / Q000000981:diagnostic imaging; D012082:Renal Veins / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed / Q000379:methods*
D003287:Contrast Media