摘要
目的：观察系列MRI上股骨头坏死的坏死信号和面积比例变化。方法：根据股骨头坏死的诊断标准，对10例（20髋）具有2次及以上MRI成像的股骨头坏死患者进行研究，其中男8例，女2例；年龄24～58岁，平均40岁。两次MRI成像平均相差18．1个月，观察其坏死信号和面积比例变化。结果：第1次MRI检查时的平均坏死面积比例为52．62％±17．90％，第2次MRI检查时的平均坏死面积比例52．24％±19．39％，两者差异无显著性（P=0．687）。两次MRI检查时，均有180个层面，共有38个层面出现信号改变。在无外科治疗及塌陷出现的8髋65个层面中，2个层面发生信号改变；在塌陷加重而无外科治疗的3髋37个层面中，3个层面发生信号改变；在出现塌陷或有外科治疗的9髋78个层面中，33个层面发生信号改变，（P=0）。结论：股骨头坏死的坏死面积比例不随病程的延长及临床分期的进展而改变。如无外科干预或软骨下骨折出现，股骨头坏死的信号强度也无明显变化。
Objective：To analyze whether the image of avascular necrosis of the femoral head （ANFH） such as signal intensity,the percentage of necrotic surface would change as clinical developed. Methods： According to diagnosis standard of ANFH ,there were 10 cases （20 hips ;8 male and 2 female; the average age of 40 years ranging from 24 to 58 years） with serials MR imaging. The average interval time was 18.1 months. The percentage of necrotic surface and signal intensity were compared. Results：The percentage of necrotic surface was 52. 62% ± 17.90% on first MRI,52. 24%± 19. 39% on second MRI. There were no significant differences between them. There were 180 images in each MRI and 38 images with signal intensity changed. In 65 images （8 hips） without surgical treatment of new collapse occurred, there were 2 images with signal intensity changed. In 3 hips with collapse at first MR imaging, there were 37 images ,3 changed. In 6 hips treated by core decompression and 3 hips with collapse developed, there were 78 images,33 changed. Conclusion：The percentage of necrotic surface does not vary with the development of course of disease. Without collapse developed or surgery, there are no signal intensity changes.
出处
《中国骨伤》
CAS
2006年第11期668-670,共3页
China Journal of Orthopaedics and Traumatology
关键词
股骨头坏死
缺血
磁共振成像
Femur head necrosis
Ischemia
Magnetic resonance imaging
