本文選題：卵巢腫瘤 + 交界性　； 參考：《中國醫(yī)學(xué)計算機成像雜志》2015年06期

【摘要】：目的:探討MR擴散加權(quán)成像(DWI)鑒別卵巢交界性上皮性腫瘤(BEOT)與卵巢癌的最佳b值。方法:DWI掃描采用平面回波成像(EPI)技術(shù),擴散敏感因子(b)值分別取0s/mm2,150s/mm2,500s/mm2,800s/mm2,1000s/mm2。對52例經(jīng)手術(shù)病理證實的BEOT與卵巢癌患者行MR DWI檢查。其中,BEOT 27例32個腫瘤,卵巢癌25例33個腫瘤。測量DWI圖像信噪比(SNR)及對比噪聲比(CNR)、實性成分與囊性成分信號強度比值(R),ADC圖上測量實性成分ADC值,兩位觀察者DWI圖像上評價腫瘤實性成分信號。結(jié)果:隨b值增大DWI圖像SNR值及CNR值均下降。b值≥500s/mm2時,隨b值增大實性成分與囊性成分DWI信號強度對比(R)增加。不同b值測得的腫瘤實性成分的ADC值在BEOT與卵巢癌間差異均有統(tǒng)計學(xué)意義。四組b值(150s/mm2、500s/mm2、800s/mm2及1000s/mm2)ROC曲線下面積(AUC)分別為0.934、0.976、0.979和0.979。b值=1000s/mm2時,兩位觀察者對腫瘤DWI信號評價仍具有一致性,絕大多數(shù)卵巢癌DWI呈強信號。結(jié)論:DWI鑒別卵巢交界性上皮性腫瘤與卵巢癌的最佳b值為1000s/mm2。
[Abstract]:Objective: to study the best b value of Mr diffusion weighted imaging (DWI) in differentiating ovarian borderline epithelial tumor from ovarian cancer. Methods using EPI (plane echo imaging) technique, the diffusion-sensitive factor (DWI) was calculated to be 0 s / mm 2150s / mm 2500s / mm 2800s / mm 2 / 100s / mm 2 respectively. Mr DWI was performed in 52 patients with got and ovarian cancer confirmed by operation and pathology. There were 32 tumors in 27 cases and 33 tumors in 25 cases of ovarian cancer. The signal-to-noise ratio (SNR) of DWI images and the contrast noise ratio (CNR) were measured. The ratio of solid to cystic component signal intensity was measured. The ADC value of solid components was measured on the ADC map, and the tumor solid component signals were evaluated on the DWI images of two observers. Results: with the increase of b value, the signal intensity of solid component and cystic component increased with the increase of b value. When the value of SNR and CNR of DWI decreased. The value of b 鈮，

本文編號：2017042