Speer K P, Spritzer C E, Harrelson J M, Nunley J A
Department of Orthopaedic Surgery, Duke University Medical Center, Durham, North Carolina 27710.
J Bone Joint Surg Am. 1990 Jan;72(1):98-103.
In fifteen patients who had a subcapital fracture of the femoral neck (twelve displaced fractures and three non-displaced fractures), magnetic resonance imaging of the femoral head was done with two-dimensional Fourier transform spin-echo technique within forty-eight hours of injury. The magnetic resonance image did not show avascular necrosis of the femoral head in any of the patients. In eleven patients, there was a decreased signal at the base of the femoral head, immediately adjacent to the fracture. This decreased signal corresponded to a recognized band of necrosis and hemorrhage next to the site of the fracture and was not related to the viability of the femoral head. No other changes were seen on the images. We concluded that this type of magnetic resonance imaging is inadequate to determine the viability of the femoral head within forty-eight hours after a patient sustains an acute intracapsular fracture of the femoral neck.
在15例股骨颈头下型骨折患者（12例移位骨折和3例无移位骨折）中，于受伤后48小时内采用二维傅里叶变换自旋回波技术对股骨头进行磁共振成像检查。在任何患者中，磁共振图像均未显示股骨头缺血性坏死。11例患者中，紧邻骨折处的股骨头基底部信号减低。这种信号减低对应于骨折部位旁公认的坏死和出血带，与股骨头的存活情况无关。图像上未见其他改变。我们得出结论，对于急性股骨颈囊内骨折患者，这种类型的磁共振成像不足以在伤后48小时内确定股骨头的存活情况。
