An Experimental Study Of Early Diagnosis In The Avascular Necrosis Of The Femoral Head

Objective: Analysis and comparing of X-ray CT.. ECT.. MRI in the early diagnosis of avascular necrosis of the femoral head. Method : 20 goats were randomized into several groups according to the postoperative time .One side femoral head ischcmia necrosis model was produced by operation,the other side was aimed as control group.The four kinds of imagological methods were undertaken after operation periodically and the samples of pathology were collected. Result: During the first 12 weeks after the model was established, the experimental animals were checked by the four kinds of imagologies in 18.. 19.. 20.. 23 times respectively. The positive results were 4. 7.. 15.. 20 times respectively .The positive rate were 22.2%.. 36.8%.. 75.0%.. 86.9% respectively .The X2-test shows that there exist statistic difference(p