膝关节损伤mri诊断75800

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2、裂、纵形撕裂、桶柄状撕裂（Bucket-handleTear）、复杂撕裂、半月板关节囊分离www.themegallery.comwww.themegallery.comwww.themegallery.comwww.themegallery.comwww.themegallery.comwww.themegallery.comwww.themegallery.comwww.themegallery.comwww.themegallery.comwww.themegallery.comwww.theme

3、gallery.comwww.themegallery.comwww.themegallery.comwww.themegallery.comwww.themegallery.comwww.themegallery.comwww.themegallery.comwww.themegallery.comwww.themegallery.com盘状半月板（DiscoidMeniscus）MRI-sag:5mm层厚扫描时有3个或以上层面显示半月板前后角相连，形成蝴蝶结样改变Cor-半月板最窄处宽度大于14-1

4、5mm，外侧缘高于对侧2mm以上www.themegallery.comwww.themegallery.comwww.themegallery.com交叉韧带正常ACL起于髁间嵴前区,向上后外至于股骨外髁内后面PCL起于髁间后区,向上前内,至于股骨内髁外后面www.themegallery.com交叉韧带损伤(InjuryofTheCruciateLigaments)交叉韧带损伤MRI表现前交叉韧带损伤有完全撕裂和部分撕裂MRI上区分部分和完全撕裂困难前交叉韧带完全撕裂直接征象为ACL连续性中断韧带扭

5、曲呈波浪状ACL内形成假瘤，在T1WI呈低信号，T2WI上呈高信号，并且见不到完整的纤维束T2WI上ACL内呈现弥漫性高信号www.themegallery.com后交叉韧带断裂的征象PCL连续性中断，残余的韧带退缩、扭曲MRI上未显示PCL在T1WI、T2WI上呈不规则的高信号PCL胫骨附着点有撕脱的骨碎片和后交叉韧带相连而韧带的连续性未见中断www.themegallery.comwww.themegallery.comwww.themegallery.comwww.themegallery.com

6、www.themegallery.comwww.themegallery.comwww.themegallery.comwww.themegallery.comwww.themegallery.comwww.themegallery.com侧副韧带损伤InjuryofTheCollateralLigaments正常解剖胫侧副韧带起自股骨内侧收肌结节之下，止于胫骨的内侧，相当于胫骨粗隆水平，长度约11cm，宽度约1.5cm腓侧副韧带起自股骨外上髁上方，止于腓骨头下方，呈一个圆索条状结构，长约5-7cmww

7、w.themegallery.com侧副韧带损伤InjuryofTheCollateralLigaments影像学表现MRI上正常副韧带在任何序列均为低信号检查多采用冠状面和横轴面检查www.themegallery.com侧副韧带损伤InjuryofTheCollateralLigaments影像学表现侧副韧带损伤MRI上表现为韧带内长T2高信号完全断裂表现为韧带连续性中断或韧带增粗、肿胀、韧带内弥漫性高信号www.themegallery.comwww.themegallery.comwww.the

8、megallery.comwww.themegallery.comwww.themegallery.comwww.themegallery.comwww.themegallery.com髌韧带损伤InjuryofThePatellarLigaments正常解剖为股四头肌的延续部是全身最强大的韧带之一位于膝关节囊的正前方起自髌尖及其后方的粗面，向下止于胫骨粗隆，长约8cmwww.themegallery.com髌韧带损伤InjuryofThe