孫明華 陶健 袁懷平 闞宏 王嫚 邵凱凱


【摘要】 目的:對比基于PI-RADS v2評分在1.5T MRI多參數成像中不同評分方法對前列腺良惡性病變診斷效能。方法:對經病理證實前列腺癌(prostate cancer,PCa)43例、前列腺增生(benign prostate hyperplasia,BPH)38例的MRI T2WI、DWI及動態增強圖像(DCE)分別進行PI-RADS v2評分,將兩位醫師評分結果進行Cohens Kappa一致性檢驗;記錄T2WI、DWI序列分值較大值,并對T2WI、DWI分值求平均值。繪制受試者工作特征曲線ROC曲線,比較曲線下面積,計算三種評分方法的敏感度、特異度。結果:兩名醫師T2WI、DWI單獨評分所得分值較大值、均值及綜合評分分值一致性強(K值分別為0.918、0.861、0.881),差異無統計學意義(P>0.05);T2WI、DWI兩者較大值、平均值及綜合評分對前列腺評分結果依次為外周帶PCa:(4.21±1.03)、(4.05±1.02)、(4.21±0.80)分,外周帶BPH:(2.41±1.00)、(2.30±0.95)、(2.43±0.97)分,移行帶PCa:(4.29±1.18)、(3.98±1.20)、(4.20±0.94)分,移行帶BPH:(2.66±1.33)、(2.33±1.14)、(2.22±1.11)分,外周帶、移行帶PCa、BPH三種方法評分結果差異均有統計學意義(P<0.05);外周帶、移行帶PI-RADS v2評分較大值、平均值及綜合評分ROC曲線下面積分別為0.885、0.893、0.918及0.819、0.843、0.907。結論:基于PI-RADS v2評分T2WI、DWI評分的較大值、平均值及綜合評分對前列腺外周帶、移行帶PCa均有較高的診斷效能,其中綜合評分診斷效能最高,平均值準確度最高。
【關鍵詞】 前列腺癌 磁共振成像 前列腺影像報告和數據系統第2版
[Abstract] Objective: To compare the diagnostic efficacy of different scoring methods base on PI-RADS v2 in 1.5T MRI multi-parameter imaging for benign and malignant prostate diseases. Method: The images of T2WI, DWI and dynamic enhanced images (DCE) in MRI of pathologically confirmed cases of 43 prostate cancer (PCa) and 38 of benign prostatic hyperplasia (BPH) were scored based on PI-RADS v2 by two radio-diagnostic physicians respectively, the results received the Cohens Kappa consistency test. The larger value and mean value of images of T2WI and that of DWI were recorded. The ROC curve of the receiver operating characteristic curve was drawn, the area under the curve was compared and calculated the sensitivity and specificity of the three scoring methods. Result: The agreement of the larger value, mean value on T2WI, DWI images and comprehensive score which scored by two radio-diagnostic physicians respectively was strong (K values were 0.918, 0.861, 0.881, respectively), the difference was not statistically significant (P>0.05). The values of the three scoring methods for prostate lesions were as follows, peripheral zone PCa: (4.21±1.03), (4.05±1.02), (4.21±0.80) score; peripheral zone BPH: (2.41±1.00), (2.30±0.95), (2.43±0.97) score; transition zone PCa: (4.29±1.18), (3.98±1.20), (4.20±0.94) score; transition zone BPH: (2.66±1.33), (2.33±1.14), (2.22±1.11) score. There were significant differences in the values of the three methods of PCa and BPH in peripheral zone and transition zone (P<0.05). The area under the average ROC curve of the larger value, mean value on T2WI, DWI images and comprehensive score based on PI-RADS v2 in the peripheral zone and the transition zone of prostate were 0.885, 0.893, 0.918 and 0.819, 0.843, 0.907, respectively. Conclusion: The larger value, mean value of the T2WI, DWI images based on PI-RADS v2 and comprehensive score have higher diagnostic efficacy for the prostate cancer both in the peripheral zone and the transition zone, the diagnostic efficacy of comprehensive score is the highest. The accuracy of mean value is best.[Key words] Prostate cancer Magnetic resonance imaging Prostate image report and data system version 2First-authors address: The Affilated Hospital in Fuyang of Anhui Medical University, Fuyang 236000, China
近年來,我國前列腺癌發病率逐年遞增[1-4],核磁共振多參數成像(multi-parameter MRI,MP-MRI)對其早期檢出、良惡性病變鑒別診斷及指導活檢均有較高的臨床價值[5-9],但存在著掃描參數不規范、圖像分析一致性差、影像與臨床醫師交流不暢等問題。為此,2015年歐洲泌尿生殖協會聯合美國放射協會、AdMeTech基金會制定了前列腺影像報告和數據系統(prostate imaging reporting and data system version 2,PI-RADS v2),該系統臨床應用以來,其簡便性、準確性得到普遍認可[10-12],但該評分標準的使用方法不一[13-15]。本研究回顧性分析43例前列腺癌、38例前列腺增生MRI資料,基于PI-RADS評分對比不同評分方法對前列腺良惡性病變的診斷及鑒別診斷價值,現報道如下。
1 資料與……