Abstract:

　　Objective: To decide 95% reference value of normal renal parenchyma volume（NRPV）in adults, and explore its relationship with the age, sexuality, body height and weight of the individual, and establish a simple formula for predicting NRPV. Methods: 200 cases without renal diseases underwent no-enhancement abdomen CT. Renal parenchyma volumes（RPV）obtained from CT data were measured adopting volume software. Result: 95% reference value of left，right and bilateral RPV were respectively (81.80, 166.66) cm3, (75.50, 168.64) cm3 and (160.57, 332.03) cm3 for women, and (102.57，193.71）cm3，（102.57，188.31）cm3 and（208.01，379.15）cm3 for men. There was no significant difference between left and right RPV between male and female (P>0.05), however, ipsilateral RPV value had statistical difference between male and female（P＜0.001）. There was no significant difference in the value of RPV among different age groups (P >0.05). Multiple linear regression analysis showed that RPV had linear regression relationship with height and weight, no relationship with age and sex. Using stepwise regression method can draw a formula: bilateral RPV (cm3)=3.264×body height(cm)+1.060×weight(kg)-335.909. Conclusions: The study suggests that NRPV in adult mainly relate to body height and weight, without direct relation to age and sex. There was no statistical difference between left and right RPV in adults. Bilateral RPV can be predicted by body height and weight regardless of age and sex.

Key words: kidney, radiometry, volume, X-ray computer, tomography