Purpose: To study the diagnostic value of MR of early avascular necrosis of the femoral head (ANFH).
目的：研究MR对早期股骨头缺血坏死(ANFH)的诊断价值。
Objective: to observe the characteristics of MRI and pathological course of early ischemic necrosis of femoral head (INFH), and to study the pathological bases of MRI signal in early INFH.
目的：观察犬早期股骨头缺血坏死的MRI图像特点，病理演变过程，探讨MRI信号的病理基础。
Purpose: To evaluate the value of X-ray plain, CT and low-field MRI in early avascular necrosis of femoral head.
目的：探讨X线、CT及低场MRI在诊断早期股骨头缺血坏死中的价值。
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