Lee J K, Yao L
Department of Radiology, Albany Medical College, NY.
Radiology. 1988 Oct;169(1):217-20. doi: 10.1148/radiology.169.1.3420261.
Five cases of stress fracture were studied with high-field-strength magnetic resonance (MR) imaging. In all cases, MR images showed bandlike areas of very low signal intensity in the intramedullary space, which were continuous with the cortex. These findings corresponded in location to the sites of fracture or new bone formation noted on radiographs. Surrounding areas of decreased signal intensity in the marrow space were also consistently seen on T1-weighted images. In three cases, prominent intramedullary areas of high signal intensity were noted on T2-weighted images obtained within 3 weeks of the onset of symptoms. Juxtacortical and/or subperiosteal areas of high signal intensity were also seen on T2-weighted images in two cases. Characteristic MR findings may distinguish stress fracture from occult intraosseous fracture.
对5例应力性骨折患者进行了高场强磁共振（MR）成像研究。在所有病例中，MR图像均显示骨髓腔内极低信号强度的带状区域，该区域与皮质连续。这些发现的位置与X线片上显示的骨折部位或新骨形成部位一致。在T1加权图像上也始终可见骨髓腔内信号强度降低的周围区域。3例患者在症状出现后3周内获得的T2加权图像上可见明显的骨髓内高信号强度区域。2例患者在T2加权图像上还可见皮质旁和/或骨膜下高信号强度区域。特征性的MR表现可将应力性骨折与隐匿性骨内骨折区分开来。
