[Perfusion characteristics of renal mass with 64-slice spiral computed tomography].
OBJECTIVE
To investigate the perfusion characteristics of renal mass parenchyma on 64-slice spiral computed tomography (CT).


METHODS
Totally 91 patients with renal mass were enrolled. Sixty-four slice spiral CT was used for renal perfusion scan that began with a contrast bolus injection of 50 ml (370 mgI/ml) at a rate of 5 ml/s. Perfusion characteristics, including blood flow (BF), blood volume (BV), and permeability (PM) of renal mass parenchyma and renal cortex in affected and normal kidneys were calculated from Siemens Body PCT (VB20B) software, and the perfusion characteristics among renal mass parenchyma and renal cortex in affected and normal kidneys were compared.


RESULTS
Renal clear cell carcinoma (RC-CC), renal pelvic transitional cell carcinoma (RPTCC), and renal angiomyolipoma (RAML) was pathologically confirmed in 40, 21, and 16 patients, respectively, while the remaining 14 patients were diagnosed as with renal simple cyst (RSC). Technical failure was experienced in 1 (1.1% ) patient. Perfusion parameters of tumor parenchyma were measured as follow: RCCC, BF (93.7 +/- 20.2) ml x (100 ml)(-1) x min(-1), BV (182.0 +/- 46.6) 1000:1, PM (115.7 +/-30.2) 0.5 ml x (100 ml)(01) x min(-1); RPTCC, BF (48.0 +/- 21.2) ml x (100 ml)(-1) x min(-1), BV (82.4 +/- 29.7) 1000:1, PM (65.7 +/- 17.2) 0.5 ml (100 ml)(-1) x min(-1); RAML, BF (52.6 +/- 18.5) ml x (100 ml)(-1) x min(-1), BV (110.1 +/- 45.9) 1000:1, PM (60.1 +/- 23.0) 0.5 ml x (100 ml)(-1) x min-1; RSC, BF (7.0 +/- 6.5) ml x (100 ml)(-1) min(-1), BV (16.2 +/- 9.7) 1000:1, PM (12.0 +/- 7.2) 0.5 ml x (100 ml) (-1) x min(-1). In all pathological groups, perfusion pa- rameters showed significant differences (P <0 . 1) between mass parenchyma and renal cortex in affected kidney, while there were no significant differences (P > 0. 5) in perfusion characteristics between renal cortex in affected and normal kidneys. Aslo, the perfusion characteristics were significantly different between parenchyma D in any two kinds of renal masses (P <0 . 5) except for RPTCC and RAML (P > 0. 5). C ONCLUSIONS: fDif-rent pathological types of renal mass have different perfusion characteristics. Perfusion imaging with multislice CT is potentially useful in the differential diagnosis of renal mass.
Sun
Hao
H
Department of Radiology, PUMC Hospital, CAMS and PUMC, Beijing 100730, China.
Xue
Hua-Dan
HD
Liu
Wei
W
Wang
Yun
Y
Zhao
Wen-Min
WM
Jin
Zheng-Yu
ZY
D000328:Adult; D000368:Aged; D001810:Blood Volume; D005260:Female; D006801:Humans; D007680:Kidney Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging* / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D055420:Perfusion Imaging; D012039:Regional Blood Flow; D036542:Tomography, Spiral Computed; D055815:Young Adult