急性化脓性骨髓炎的MRI表现

目的：研究MRI在诊断急性化脓性骨髓炎早期病变的价值。方法：12例经临床证实的下肢骨急性骨髓炎患者分别于发病后2-14d在Philips0.5T超导型MR扫描仪下行横轴面、矢状面和冠状面扫描。结果：12例中11例骨髓内呈现异常MR信号，1例发病仅2d者骨髓内无异常信号。病变随时间的推移与正常骨髓间分界逐渐清晰，在T1WI骨髓内病变呈斑片状稍长T1、长T1低信号，在T2WI上病变呈斑片状长T2高信号，在短时反转恢复（STIR）序列上这种信号改变尤其明显。结论：MRI诊断急性化脓性骨髓炎优于其他影像学检查。

MR imaging diagnosis of acute suppurative osteomyelitis

Objective To evaluate MR imaging diagnosis in acute suppurative osteomyelitis at early stage. Methods The axis, sagittal and coronal planes were performed with Philips 0.5 T superconduct MR scanner on 12 cases of acute suppurative osteomyelitis in lower extremity proved by clinical data 2 to 14 days after onset. Results Abnormal signals in marrow were displayed in all 11 cases 3 to 14 days after onset. No abnormality was found in 1 case 2 days after onset. The interface between normal and abnormal marrow became clear as time going on. The lesion presented as patchy low intensity on T 1WI and high signal on T 2WI. The signal changes were marked especially on STIR. Conclusion MRI was superior to other imaging methods in diagnosis of acute suppurative osteomyelitis.