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ID:33713098
大小:1.91 MB
页数:52页
时间:2019-02-28
《磁共振dwi评价原发性肝癌tace术疗效的价值》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、中图分类号:R445.2;R445.3;R735.7;R814.43;R816.6硕士学位论文磁共振DWI评价原发性肝癌TACE术疗效的价值院(系)、所临床医学院研究生姓名赵冬梅学科、专业影像医学与核医学导师姓名韩福刚教授二O一二年四月目录1磁共振DWI评价原发性肝癌TACE术疗效的价值„„„„11.1中文摘要„„„„„„„„„„„„„„„„„„„„21.2英文摘要„„„„„„„„„„„„„„„„„„„„41.3前言„„„„„„„„„„„„„„„„„„„„„„71.4材料与方法„„„„„„„„„
2、„„„„„„„„„„81.5结果„„„„„„„„„„„„„„„„„„„„„„121.6讨论„„„„„„„„„„„„„„„„„„„„„„251.7结论„„„„„„„„„„„„„„„„„„„„„„341.8参考文献„„„„„„„„„„„„„„„„„„„„361.9英汉缩略词对照表„„„„„„„„„„„„„„„„392致谢„„„„„„„„„„„„„„„„„„„„„„413肝细胞癌TACE术后疗效的影像学评价(综述)„„„„„„„„„„„„„„„„„„„„„„„„421磁共振DWI评价原发性肝癌TACE
3、术疗效的价值摘要目的:探讨应用磁共振扩散加权成像(DWI)评价原发性肝癌经导管肝动脉栓塞化疗(TACE)术后肿瘤栓塞疗效的价值。方法:在3.0TAchievaPhilipsMR机上,对30例原发性肝癌患者使用常规MRI、DWI扫描及MR动态增强。于TACE术前、术后1周内及术后1月(第2次术前)分别行多个扩散敏感梯度因子(b值2为400,600,800s/mm)的DWI扫描,通过观察DWI上肿瘤病灶中碘油沉积情况及肿瘤表观弥散系数(ADC)值的变化趋势,分析碘油沉积区、肿瘤坏死区、肿瘤复发区和肿
4、瘤转移区在DWI图像上的信号及ADC值特点,从而分析肿瘤坏死、复发、转移情况;同时将检查结果与MR动态增强、DSA及CT增强扫描结果对照分析,并结合第1次TACE术后与第2次TACE术前肿瘤的血管造影染色及碘油沉积的改变判断肿瘤的复发情况,以DSA结果为金标准,研究MR-DWI准确性。结果:①30例原发性肝癌患者第一次行DSA-TACE术,共显示35个病灶,其中30个病灶碘油沉积良好,另5个碘油沉积欠佳,提示肿瘤残留。TACE术后1月行第二次TACE术前,DSA发现30例肝癌患者中10个病灶碘油
5、沉积良好,造影后未见明显肿瘤染色;25个病灶碘油沉积欠佳,造影后肿瘤实质成分可见染色,提示肿瘤残留及复发;另外发现13个新发病灶,造影后出现肿瘤染色,提示示肿瘤转移。②30例原发性肝癌患者TACE术后1周MR-DWI共显示33个病灶,其中29个病灶碘油沉积良好,表现为均匀一致的低信号影;4个病灶碘油沉积欠佳,肿瘤残留区域呈高信号。TACE术后1月,MRI-DWI检查发现30例肝癌患者中9个病灶碘油沉积良好,表现为均匀低信号;24个病灶碘油沉积欠佳,表现为混杂高信号,提示肿瘤残留及复发,MR-DW
6、I对肿瘤复发灶检出率为96%;另外发现13个新发病灶,表现为高信号,提示肿瘤转移。碘油沉积区和肿瘤坏死区DWI呈低信号,肿瘤复发区及转移区DWI呈高信号。③本研究取b值分别为400、600、2800s/mm,发现随b值增加,肝脏DWI图像质量呈下降趋势,且ADC值逐渐减2小。b值取600s/mm时,肿瘤组织与肝实质之间存在最佳对比度,图像质量较22好。④b值取600s/mm时,肝癌组织在TACE术前、术后1周内及术后1月各-32-32组的平均ADC值分别为(1.476±0.28)×10mm/s、
7、(1.723±0.53)×10mm-32/s、(1.684±0.48)×10mm/s。术后各组肝癌组织的ADC值较术前明显升高(P<0.05);术后1月组的ADC值较术后1周组降低(P<0.05)。将第1次TACE术后与第2次TACE术前的造影片及碘油沉积片对比见术后1月组ADC值下降的肝癌病例都有不同程度的复发,ADC值下降明显的复发也最为明显。⑤原发性肝癌患者经TACE术后1月,MR-DWI、MR-动态增强扫描、多排CT增强检查分别检出肿瘤复发灶24、18、10个,灵敏度分别是96%、72%
8、、40%,特异度90%、80%、70%;MR-动态增强扫描、多排CT增强检查分别检出肿瘤转移灶13、12、11个,各组间虽无明显统计学差异,但MR-DWI序列上信号强度较MR-动态增强、SCT增强检查更敏感。结论:1.磁共振扩散加权成像对原发性肝癌TACE术后疗效评价具有重要意义。2.MR-DWI用于肝脏组织时选择合适的b值至关重要,本组资2料表明b值取600s/mm时,成像质量最佳,信号噪声比最高。3.MR-DWI不仅可以评价肝癌的TACE术治疗效果,得到图像资料,而且可以用ADC值进行定量研
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