磁敏感加权成像对四肢软组织海绵状血管瘤临床应用初探  

Priliminary study of susceptibility weighted imaging in limbs soft tissue cavernous hemangioma

作　　者：李树金[1] 张辉[1] 刘起旺[1] 钱丽霞[1] 郭娟[1] 

机构地区：[1]山西医科大学第一医院放射科,山西太原030001

出　　处：《医学影像学杂志》2011年第2期248-251,共4页Journal of Medical Imaging

摘　　要：目的:探讨磁敏感加权成像在四肢软组织海绵状血管瘤的影像学表现特征及其应用价值。方法:分析11例经手术及病理证实的四肢软组织海绵状血管瘤常规MR表现及SWI表现。结果:MR表现分为:①局限肿块型7例,T1WI呈等或稍高信号,4例T2WI呈高信号;3例T2WI呈高、低混杂信号;②弥漫蔓藤型4例,T1WI呈等或稍高信号,T2WI及T2WI脂肪抑制呈高信号或高、低混杂信号。SWI表现:①肿瘤显示:4例局限肿块型呈较均匀稍高信号,3例局限肿块型及4例弥漫蔓藤型呈混杂信号或低信号为主,其间混杂条索状高信号;②静脉引流血管显示:4例局限肿块型为低回流型,3例局限肿块型及4例弥漫蔓藤型为高回流型;③肿瘤钙化与出血的鉴别:5例肿瘤钙化相位图以低信号为主,周边环以高信号;7例出血灶信号与之相反。结论:SWI序列可以客观的反映软组织海绵状血管瘤的构成成分,较常规序列可以提供更多的信息,为临床诊断及治疗方案的选择提供有重要的价值。Objective：To evaluate the diagnostic value of susceptibility weighted imaging（SWI） for soft tissue cavernous hemangioma（STCH）.Methods：11 cases confirmed soft tissue cavernous hemangioma of extremities by clinic and pathology were performed with MRI conventional sequences,including T1WI,T2WI and SWI.Results：Of the 11 cases,7 cases were cavernous clumps,there were six cases in intramuscular and one case in rarefaction tissue.In MRI conventional sequences T1WI STCH displayed as equisignal,high signal intensity,four case in T2WI as equisignal,high signal intensity and three case were high,mixed signal intensity,in T2WI fat saturation as high signal intensity.The four pampiniform clumps were all located in rarefaction tissue,which appeared tortuous dilation blood vessel without vascular flow void phenomenon.In SWI lesions four cases of cavernous clumps were displayed high signal intensity,other of them and three cases of all located in rarefaction tissue as low and high mixed signal intensity.In mIP,four cases of cavernous clumps were difined as minimum flow and other were difined as high flow capacity.Calcium within the STCH appeared mainly in signal hypointense signal intensity surrounded by hyperintense signal ring on phase image in 5 cases,while blood product appeared conversely in 7 cases.Conclusion：SWI sequence can reflect component of soft tissue angiocavernoma of the extremities,and can provide more information than MRI conventional sequences.

关 键 词：磁敏感加权成像 海绵状血管瘤 软组织 

分 类 号：R445.2[医药卫生—影像医学与核医学] R738.6[医药卫生—诊断学]