Imaging of the vascular supply in renall tumors using the contrast enhanced magnetic resonance angiography on 3T MR system
Abstract
32 patients with kidney tumor underwent the dynamic contrast enhanced MRA using 3T system after intravenous application of gadobenate dimeglumine. All patients underwent the surgery, surgeon assessed the vascular supply of the kidney and the results of the surgical exploration were compared with the findings of renal MRA. 44 arteries and 38 veins were found by surgeon in 32 kidneys.
In the evaluation per patient, the accuracy of 90.6% was reached for the renal arteries, the same accuracy for vein evaluation was found. The accuracy for the whole vascular anatomy, the accuracy decreased to 84.4%.
In per vessel analysis, the accuracy increased to 93.2% for arteries, 92.1% for veins and 93.9% for all vessels respectively. Three vessels were not displayed, three vessels were not described even if they were present on angiograms.
Contrast enhanced MRA of the kidney is a valuable alternative in the preoperative assessment of vasculature before kidney surgery, but suffers from important decrease of accuracy due to objective and subjective reasons.