摘要
目的探讨MRI动态增强(DCE—MRI)和弥散加权成像(DWI)在前列腺癌(PCa)临床诊断中的应用价值及其与前列腺特异性抗原(PSA)表达水平的相关性。方法回顾性分析66例PCa患者及30例前列腺增生(BHP)患者临床诊断资料,所有患者均以病理诊断结果为最终诊断依据,并进行MRI常规、DCE—MRI、DWI检查及血清PSA水平检测,比较PCa及BHP在DCE—MRI中的信号强度-时间(SI-T)曲线及各参数值差异,比较两者在DWI中表观弥散系数值(ADC)差异,并采用Person相关性分析各诊断参数与PSA的相关性。结果在DCE-MRI中,PCa和BHP在达峰时间[(69224.14±18245.14)VS(82911.42±26742.37)]、最大增强斜率[(231.83±38.15)VS(187.35±39.35)]、信号增强率[(124.29±14.42)VS(101.31±10.24)]以及Ⅲ型SI—T曲线类型病例数(42例VS3例)上差异均具有统计学意义(P〈0.05);在DWI中,PCa和BHP在ADC[(0.73±0.21)VS(1.00±0.19)]及指数表观扩散系数[(O.51±0.08)VS(0.39±0.08)],差异具有统计学意义(P〈0.05);此外,DCE-MRI联合DWI诊断PCa准确度可达91.7%,高于单独使用DCE-MRI(78.2%)或DWI(78.1%),在ROC曲线线下面积中,ADC高于其他指标,且ADC与PAS具有一定的负相关性(r=0.572,P=0.032)。结论DCE-MRI、DWI在鉴别PCa与BHP中具有一定诊断价值,且联合两者可提高诊断准确度,此外,ADC值可作为PAS表达水平变化的支持依据。
Objective To discuss on the value of dynamic contrast-enhanced MRI ( DCE-MRI ) and diffusion-weighted imaging ( DWI ) . in diagnosising prostate cancer ( PCa ) and its relationship with prostate-specific antigen ( PSA ) expression. Methods A retrospective analysis of 66 cases of PCa and 30 cases of benign prostatic hyperplasia ( BHP ) in our hospital, all patients were diagnosed by pathology based on the final diagnosis, and underwent conventional MRI, DCE-MRI, DWI examination and serum levels of PSA testing.Compared the differences of PCa and BHP in the DCE-MRI signal intensity-time ( SI-T ) curve, parameters value and apparent diffusion coefficient ( ADC ) in DWI, and used Person correlation analysis to analyze the correlation betweenthe diagnostic parameters and PSA. Results In DCE-MRI, PCa and BHP at peak time [ ( 69224.14 ± 18245.14 ) vs ( 82911.42 ± 26742137 )] , the maximum slope of increase ( 231.83 + 38.15 vs 187.35 + 39.35 ) ] , signal enhancement ratio [ (124.29±14.42) vs (101.31±10.24) ] and Ⅲ in theDWI, [ (0.73±0.21) vs (1.00±0.19) ] and the index of apparent PCa and BHP in ADC type SI-T curve type number of cases ( 42 cases vs 3 cases ) the differences were statistically significant ( P〈0.05 ) diffusion coefficient [ ( 0.51 ± 0.08 ) vs ( 0.39 ± 0.08 ) ] , the difference was statistically significant ( P〈0.05 ) .In addition, DCE-MRI diagnosis of PCa joint DWI accuracy of up to 91.7%, higher than DCE-MRI ( 78.2% ) or DWI ( 78.1% ) , in the area under the ROC curve lines, ADC was higher than other indicators, and the ADC and PAS had a negative correlation ( r=-0.572, P=0.032 ) . Conclusion DCE-MRI and DWI have a certain diagnostic value in differentiating PCa and BHP, and the combination of both can improve the diagnostic accuracy.In addition, ADC values can be used as a basis for PAS expression changes.
出处
《浙江临床医学》
2017年第4期633-635,共3页
Zhejiang Clinical Medical Journal
关键词
MRI动态增强
弥散加权成像
前列腺癌
前列腺特异性抗原
Dynamic contrast enhanced MRI Diffusion weighted imaging Prostate cancer Prostate specific antigen