天堂国产午夜亚洲专区-少妇人妻综合久久蜜臀-国产成人户外露出视频在线-国产91传媒一区二区三区

MR擴(kuò)散加權(quán)成像鑒別卵巢交界性上皮性腫瘤與卵巢癌的b值優(yōu)化

發(fā)布時(shí)間:2018-06-14 10:15

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


【摘要】:目的:探討MR擴(kuò)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(kuò)散敏感因子(b)值分別取0s/mm2,150s/mm2,500s/mm2,800s/mm2,1000s/mm2。對(duì)52例經(jīng)手術(shù)病理證實(shí)的BEOT與卵巢癌患者行MR DWI檢查。其中,BEOT 27例32個(gè)腫瘤,卵巢癌25例33個(gè)腫瘤。測量DWI圖像信噪比(SNR)及對(duì)比噪聲比(CNR)、實(shí)性成分與囊性成分信號(hào)強(qiáng)度比值(R),ADC圖上測量實(shí)性成分ADC值,兩位觀察者DWI圖像上評(píng)價(jià)腫瘤實(shí)性成分信號(hào)。結(jié)果:隨b值增大DWI圖像SNR值及CNR值均下降。b值≥500s/mm2時(shí),隨b值增大實(shí)性成分與囊性成分DWI信號(hào)強(qiáng)度對(duì)比(R)增加。不同b值測得的腫瘤實(shí)性成分的ADC值在BEOT與卵巢癌間差異均有統(tǒng)計(jì)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(shí),兩位觀察者對(duì)腫瘤DWI信號(hào)評(píng)價(jià)仍具有一致性,絕大多數(shù)卵巢癌DWI呈強(qiáng)信號(hào)。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(hào):2017042

資料下載
論文發(fā)表

本文鏈接:http://sikaile.net/yixuelunwen/fuchankeerkelunwen/2017042.html


Copyright(c)文論論文網(wǎng)All Rights Reserved | 網(wǎng)站地圖 |

版權(quán)申明:資料由用戶98f02***提供,本站僅收錄摘要或目錄,作者需要?jiǎng)h除請(qǐng)E-mail郵箱bigeng88@qq.com
国产91人妻精品一区二区三区| 国产日韩在线一二三区| 懂色一区二区三区四区| 亚洲最新的黄色录像在线| 日木乱偷人妻中文字幕在线| 日本少妇中文字幕不卡视频| 男人大臿蕉香蕉大视频| 欧美日韩精品一区二区三区不卡| 东北女人的逼操的舒服吗| 高清不卡视频在线观看| 欧美野外在线刺激在线观看| 大尺度激情福利视频在线观看| 黄色三级日本在线观看| 色婷婷在线视频免费播放| 一本久道久久综合中文字幕| 日本欧美三级中文字幕| 国产情侣激情在线对白| 中国黄色色片色哟哟哟哟哟哟| 亚洲欧美日韩色图七区| 少妇人妻中出中文字幕| 亚洲av又爽又色又色| 黄片美女在线免费观看| 国产精品二区三区免费播放心| 色鬼综合久久鬼色88| 国产在线一区二区免费| 亚洲最新中文字幕一区| 少妇视频一区二区三区| 中文字幕在线五月婷婷| 亚洲精品伦理熟女国产一区二区| 欧美一区二区三区不卡高清视| 99久久人妻中文字幕| 亚洲午夜精品视频观看| 欧洲亚洲精品自拍偷拍| 婷婷亚洲综合五月天麻豆 | 黄色片一区二区在线观看| 日本久久中文字幕免费| 成在线人免费视频一区二区| 在线免费不卡亚洲国产| 麻豆最新出品国产精品| 四季精品人妻av一区二区三区| 亚洲欧美日韩熟女第一页|