PartⅡDiffusion-weighted MR Imaging of breast mass and non-mass lesionPurpose:To evaluate Diffusion-weighted MR Imaging of breast mass and non-mass lesion in lesion characterization by comparing ADCs of malignanty with benignancy.

第二部分磁共振擴散加權(quán)成像在乳腺腫塊性病變和非腫塊性病變中應(yīng)用價值的對比研究目的：對比乳腺良97无码视频超级碰碰碰、惡性病變的表觀彌散系數(shù)(apparent diffusioncoefficientWWW18黄，ADC)WWWW黄色精品在线，探討DWI在乳腺腫塊性病變和非腫塊性病變中的診斷價值黄色真人免费网站。

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Materials and Methods:236 pathology-confirmed breast lesions(155 malignanty,81 benignancy) and 221 disease-free contralateral breast tissues were examined using EPI-DWIb values=0,1000 s/mm~2TR/TE=8400ms/93.8ms; FOV=30×30cm;matrix=128×128;ASSET=2,slice thickness=4mm.DCE-MR imaging was also performed for accurate location of the lesion using VIBRANT sequence.The mean ADC values of malignant and benign lesions and the disease-flee contralateral breast tissues were calculated from the ADC map for each patient.One-way analysis of variance was applied to compare the mean ADCs of malignant lesions with benign lesions and disease-flee contralateral breast tissues.The threshold ADC value for malignant lesion was determined using a receiver operating characteristic(ROC curve analysis.Each lesion was classified into two major types:mass and non-mass lesion.The diagnostic performance of DWI was compared in breast mass and non-mass lesions.Results:155 malignant and 81 benign lesions were confirmed in 236 lesions.

材料與方法：搜集術(shù)前行乳腺MR檢查并經(jīng)穿刺或手術(shù)病理證實的236例乳腺病變男女猛烈无遮挡高清免费，以對側(cè)正常乳腺腺體作為正常對照三级黄片抠屄免费观看视频，采用橫軸位的平面回波-擴散加權(quán)成像序列，TR=8400ms99精品日中，TE=93.8ms人人插人人操，層厚=4mm，激勵次數(shù)=2：視野=30×30cm亚洲欧美乱码一区二区，矩陣=128×128色哟哟操爆，ASSET=2，b值=0和1000s/mm~2欧美老女人性爱；參考動態(tài)增強圖像準確定位无码视频天天做夜夜夜做，測量病變區(qū)和對側(cè)正常乳腺腺體的ADC值av无码aV天天aV天天爽，應(yīng)用t檢驗比較良、惡性病變及正常腺體ADC值的差異日韩在线综合专区视频观看，采用接收者工作特征曲線(receiver operating characteristic curve人人射人人看性爱视频，ROC)確定良惡性病變的ADC界值；根據(jù)BI-RADS MRI將乳腺病變按照形態(tài)學(xué)表現(xiàn)分為腫塊性病變和非腫塊性病變兩組国产主播在线，比較ADC值在腫塊和非腫塊性病變中定性診斷的效能2020在线观看黄色视频播放网站。

PartⅢDiagnostic strategy of Breast Lesion using combination of dynamic contrast-enhanced and diffusion-weighted imagingPurpose:To evaluate the diagnostic accuracy of a combination of dynamic contrast-enhanced MR imaging and diffusion-weighted MR imaging in characterization of breast lesion and to find the strongest discriminators between malignancy and benignancy.Materials and Methods:223 patients with 236 pathology-confirmed breast lesions were examined using EPI-DWI,FSE-T2WI,SE-T1WI,DCE-MR imaging were performed using VIBRANT sequence.

第三部分磁共振動態(tài)增強掃描結(jié)合擴散加權(quán)成像診斷乳腺癌的策略研究目的：分析乳腺良、惡性病變的形態(tài)學(xué)表現(xiàn)国产九九久久精品视频、血流動力學(xué)表現(xiàn)三级黄免费视频网站，結(jié)合ADC值，采用單變量和多變量分析国亚洲视频，挖掘有意義的惡性MR征象www.1025毛片永久免费基地，制定乳腺癌的診斷策略，探討動態(tài)增強MR(dynamic contrast-enhanced MR imaging五月天亚洲综合在线电影，DCE-MRI)結(jié)合DWI對乳腺病變的診斷和鑒別診斷價值国产精品91av日韩经典。