Objective To evaluate the consistency of ultrasonography and magnetic resonance imaging(MRI)in measuring of prostate size and volume.Methods The data of this study was from the research data of the bladder cancer and benign prostatic hyperplasia study in Chinese population.The study examined the prostates of participants using both ultrasonography and MRI.Prostate size was measured by the transverse diameter,antero-posterior diameter,and supero-inferior diameter,and volume was calculated using a formula.Groups comparisons were conducted using Wilcoxon signed rank test and the consistency of measurement results was evaluated using Bland-Altman analysis.Results 103 patients with benign prostatic hyperplasia were included.The mean transverse diameter,mean antero-posterior diameter,and mean supero-inferior diameter of the prostate measured by ultrasonography was(5.789±0.835)cm,(5.054±0.915)cm,and(4.530±0.882)cm respectively,and the median volume was 66.690(49.179,96.110)mL.The median transverse diameter,median antero-posterior diameter and median supero-inferior diameter of the prostate measured by MRI was 5.800(5.300,6.400)cm,5.000(4.650,5.600)cm,and 4.300(3.900,4.800)cm respectively,and the median volume was 65.520(49.678,90.714)mL.The prostate size results had good agreement between ultrasound and MRI measurements,with no statistical difference between the two measurements.The prostate volume measured by ultrasonography had a small deviation compared to the MRI measurement,with an average difference of 1.329 mL.Conclusion The consistency between ultrasonography and MRI in measuring prostate size and volume is strong.In clinical practice,the appropriate method for measuring prostate size and volume should be chosen based on the specific circumstances.
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