Tonami H, Kuginuki Y, Okimura T, Yamamoto I, Kawakami S, Sasaki K
Department of Radiology, Kanazawa Medical University, Ishikawa, Japan.
J Comput Assist Tomogr. 1994 Jul-Aug;18(4):549-51. doi: 10.1097/00004728-199407000-00006.
The MR findings of two cases of subperiosteal hematoma of the orbit are described.
We present two cases of subperiosteal hematoma of the orbit following minor head trauma, the first presenting with chronic progressive exophthalmos and the second with acute proptosis.
Both cases showed a well-defined biconvex mass with a curvilinear hypointense band in the superior portion of the orbit. In Case 1 chronic hematoma demonstrated high signal on both T1- and T2-weighted imaging, and in Case 2 acute hematoma displayed intermediate signal on T1-weighted imaging and high signal on T2-weighted imaging. Follow-up MRI in Case 2 demonstrated the typical signal changes from acute to subacute hematoma.
Subperiosteal hematoma has a characteristic appearance on MRI which is virtually diagnostic. In proper clinical settings MRI is the modality of choice for the detection and characterization of this hematoma.
描述两例眼眶骨膜下血肿的磁共振成像（MR）表现。
我们呈现两例轻微头部外伤后眼眶骨膜下血肿的病例，第一例表现为慢性进行性眼球突出，第二例表现为急性眼球突出。
两例均显示眼眶上部有边界清晰的双凸形肿块，伴有一条曲线状低信号带。病例1的慢性血肿在T1加权成像和T2加权成像上均呈高信号，病例2的急性血肿在T1加权成像上呈中等信号，在T2加权成像上呈高信号。病例2的随访磁共振成像显示了从急性血肿到亚急性血肿的典型信号变化。
骨膜下血肿在磁共振成像上具有特征性表现，几乎可确诊。在适当的临床情况下，磁共振成像是检测和定性这种血肿的首选检查方法。
