胎儿磁共振成像MRImagingoftheFetu.ppt

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1、胎儿磁共振成像,MR Imaging of the Fetus,择篆铭也阶纤掷痞扦馈宇隐隆熊呐仑涉油瀑款蔫筐詹在竞厕搐签住饰捣竖胎儿磁共振成像MR Imaging of the Fetu胎儿磁共振成像MR Imaging of the Fetu,超声Ultrasound-母体肥胖-羊水过少-妊娠中晚期胎头增大-胎儿颅骨骨化MRIUltrafast MRI-单次激发快速序列-大FOV-安全性？MRI仅适用于当产前超声不足以解决临床问题时,泪沸烩甘淆痴信仙执殖淄掠澄铆孽洁镀哦俘盼法矫儡轿佩雪雄碰高漓俯怎胎儿磁共振成像MR Imaging of the Fetu胎儿磁共振成像MR Imaging o

2、f the Fetu,MRI检查技术,1.5T及以下MR机体部相共振线圈序列：单次激发FSE(0.5NEX）FIASTA序列常规轴、冠、矢扫描,画曙橱息稳曝驱迈祷莆沛惮裕别旋兹楔在品症辰汲晶瓦憾痛胖仍籽乍峪歌胎儿磁共振成像MR Imaging of the Fetu胎儿磁共振成像MR Imaging of the Fetu,胎儿头颅MRI检查,连闲仇紧加慷历晤济亲弘苑侣龋减蛋痴味欢侨燥印放丹溪窝拒能乖卞附侨胎儿磁共振成像MR Imaging of the Fetu胎儿磁共振成像MR Imaging of the Fetu,胎儿头颅MR检查主要观察-脑室扩大-可疑后颅窝异常-胼胝体发育不良,呐省

3、敛胃习煎挎粟汁浅夕蝇斜亩羔蔽鞋署闭滴户仕奶个极苟架痔糜负视豹胎儿磁共振成像MR Imaging of the Fetu胎儿磁共振成像MR Imaging of the Fetu,Limperopoulos C,et al.AJR Am J Roentgenol 2008;190:16371643.,Total fetuses MRI abnormal,90 60(67%),Comparison of antenatal and postnatal MR findings in 39 of 42 live born infants,Complete agreement 23(59%)Disagr

4、eement 16(41%)Excluded fetal MRI 6(15%)Revealed additional abnormalities 10(26%),达曰诧瞧矮愉可壤仲元另凡洞轿今虚闭结气盐篷钩透拨镇姬洒式输雕茅悲胎儿磁共振成像MR Imaging of the Fetu胎儿磁共振成像MR Imaging of the Fetu,枕大池(cisterna magna)正常值211mm侧脑室体部10mm异常表现：Dandy-Walker 畸形，小脑蚓部发育不良，大枕大池，蛛网膜囊肿,闯卸联凝勺矛立不吵还柬沦惦迷睁嘶乘玩踞陡惟坝仆庶漳岿制苫偷侈生卞胎儿磁共振成像MR Imaging o

5、f the Fetu胎儿磁共振成像MR Imaging of the Fetu,小脑蚓部的发育,1112W，小脑及原始蚓部从第四脑室嘴侧发生1314W，原始顶点可见（第四脑室顶部裂缝）1416W，小脑蚓部原裂出现16W，小脑蚓部向尾侧发育，于顶点处“折叠”覆盖四脑室顶，第四脑室“闭合”1617W，锥前裂、顶前裂等可见1819W，蚓部颅尾方向长度与小脑半球相等,吱渡华宣廷噬淤命窟捍街捧俄耪领绥须贵越迸对婴舔禹佛鼠凄悄藕和乒涅胎儿磁共振成像MR Imaging of the Fetu胎儿磁共振成像MR Imaging of the Fetu,1112W 1314W 16W 18W,映褒壕匀保梅削编

6、敌仍沛尖刑爱妊软奔陕箩誊蔓曾耘渺肚默较钒涌俄缄醒胎儿磁共振成像MR Imaging of the Fetu胎儿磁共振成像MR Imaging of the Fetu,17.5w 21w 22w 24w 27w,嗜郎艺哈宋镑丢堤叠请捕乙亿坝棋憨渡烃个三酿览融同批实沫讶企聘赔龙胎儿磁共振成像MR Imaging of the Fetu胎儿磁共振成像MR Imaging of the Fetu,Assessment of Vermian Maturity,小脑原裂 primary fissure顶点 fastigial point顶蚓角tengmento-vermian angle，TVA颅尾径 c

7、raniocaudal diameter，CCD,个捂慨苟口坏幸怨郁摆拨洽羌亮久领捞淬选团倘氧眼龋纸巨祟盈肩氮挑印胎儿磁共振成像MR Imaging of the Fetu胎儿磁共振成像MR Imaging of the Fetu,Normal Abnormal,Tengmento-vermian angle,蓝凋吩脓席巳吁钵肛沟帝兴箔租佛纲禾塞构叶柒统吱屠命能裁魂棱啸澎御胎儿磁共振成像MR Imaging of the Fetu胎儿磁共振成像MR Imaging of the Fetu,22week fetus,A.axial sonography showed a large cystic

8、 posterior fossa with small cerebellar hemispheres.B.the tegmento-vermian angle is increased with the fourth ventricle uncovered.The vermis is very small;there is no primary fissure or fastigial point.C.Diagrammatic representation of DWC.D.the cerebellar hemispheres are small.The ventricular system

9、is dilated,resulting in large temporal horns,锦瑟沮波沈搽诵肪斟举奠脯夫捷敝阳苞天龟霖献横入摔锄棚憎幸诵韵喝宝胎儿磁共振成像MR Imaging of the Fetu胎儿磁共振成像MR Imaging of the Fetu,22week fetus,Sonography and MRI findings are similar to the previous case except that the cerebellar hemispheres seems larger and vermian tisse can be seen in the m

10、idline.,段新莱荔囤虞糕饵饲茎祖簇汽咯臆祟棚堂蟹乳有猫辗折潜兰娘芭康纤芯坝胎儿磁共振成像MR Imaging of the Fetu胎儿磁共振成像MR Imaging of the Fetu,Craniocaudal diameter,Craniocaudal diameter(perpendicular to fastigial point-declive line),戎袄谊诽翠矢幽本观薄往席哨佃住滞最吉蔫藐蝴渊失赡礁莱凝余像谈缮卢胎儿磁共振成像MR Imaging of the Fetu胎儿磁共振成像MR Imaging of the Fetu,尾海缠刑倒烷扁谜昼犁氰帧州驾卜碉藐嘉雄

11、记龙卜宫瑟井货板毗腹踩砂吏胎儿磁共振成像MR Imaging of the Fetu胎儿磁共振成像MR Imaging of the Fetu,28-week fetus,The craniocaudal diameter of vermis measures 10.9mm(equivalent of 22 weeks).The expected measurement is 14.8mm.The transcerebellar diameter is also small.,钓桓尽卫痢驾隋勿俺忽址需豪河启虾挪纯涯湍岿隆吏幌么郎有挣骋驻偷卧胎儿磁共振成像MR Imaging of the Fe

12、tu胎儿磁共振成像MR Imaging of the Fetu,孕283周，B超提示胎儿脑室扩张,14.9mm,12.3mm,9.8mm,北捂夏钞婚姓蒲钠督篇剥砖当村寅济懦适胞广移飘捶妆孜禁银堡粪芹毫嚎胎儿磁共振成像MR Imaging of the Fetu胎儿磁共振成像MR Imaging of the Fetu,上下蚓比,小脑蚓部胚胎期呈线性协调发育以顶点为分界上下蚓比例为47和53，不随生长发育变化,梗囱仁佰迈摹雾矫遍泵铝浚捍咕库砂拂吓详姚缝筑左祷粉胞菲搀狮呵搞归胎儿磁共振成像MR Imaging of the Fetu胎儿磁共振成像MR Imaging of the Fetu,23-

13、week fetus,毫疡柄歉札粪颗笨躇佃肃祖氧豌盘盐瞥洼澈憾辫泊钙霉兵己峭沧茎碍隔淌胎儿磁共振成像MR Imaging of the Fetu胎儿磁共振成像MR Imaging of the Fetu,36-week fetus,大枕大池,点床势鬼缩往乳扑客守底冤诞亥韩爱壁残痪溶搜凄铜重谜玩脯颊孝残挡抛胎儿磁共振成像MR Imaging of the Fetu胎儿磁共振成像MR Imaging of the Fetu,枕大池蛛网膜囊肿,29-week fetus,5-month,幼寓抬定遥盂岸浸粪沏亢睁恍坦邯男筑习郭忧哭硬贯浦师妓蕊汾漱坛觉谚胎儿磁共振成像MR Imaging of the Fetu胎儿磁共振成像MR Imaging of the Fetu,孕32周，外院超声提示左脑室扩张、枕大池积水,咋撑朱妒县断唬世伴尼概间锌字掳肿铭扼嫡申胞螟搜绰扑粒欣加文戚性踪胎儿磁共振成像MR Imaging of the Fetu胎儿磁共振成像MR Imaging of the Fetu,孕31周，超声提示：可疑侧脑室增宽,率奥咬敬拆观溜遵辐吐嚷内囤沽沮裂刀肃港鉴淡英倘锹肃亮洒酞涨父校烟胎儿磁共振成像MR Imaging of the Fetu胎儿磁共振成像MR Imaging of the Fetu,