Abstract: To study the characteristics of multislice spiral computed tomography perfusion of the renal cancer. Methods: Multislice spiral computed tomography perfusion was performed on 25 patients with renal cancer and 22 volunteers as control. All data were sent to advanced workstation 4.2, and the perfusion parameters, such as blood flow(BF), blood volume(BV), mean transit time(MTT), capillary permeability surface(CPS), peak value(PV) and time to peak(TTP) of the tumor and the renal cortex or the medulla were obtained by Perfusion 3 software. Results: BF, BV, MTT, PS and PV was statistically different between the cancer and the renal cortex or medulla of the control group(P＜0.05), whereas TTP was not. BF was lower in cancer group than that in normal renal cortex, but was higher than that of medulla; BV was higher in cancer group than that in normal renal cortex or medulla; Both MTT and PS were longer in tumor group than those in normal renal cortex, but were shorter than those in medulla; PV was lower in tumor group than that in normal renal cortex; TTP was longer than that of normal renal cortex. Conclusion: The characteristics of CT perfusion imaging of the renal cancer are different from the normal kidney cortex or medulla in BV, BF, MTT and PS.

Key words: Tomography, Xray computed, Kidney neoplasms, Perfusion, regional