A comparative study on the diagnosis and treatment of osteonecrosis of the femoral head by CT and magnetic resonance technology

Abstract

Objective To compare the CT and magnetic resonance imaging (MRI) examination in the application value in the diagnosis and treatment of osteonecrosis of the femoral head. Methods 42 cases of early avascular necrosis of the femoral head were underwent CT and MRI examination, and two kinds of imaging methods were compared. Results MRI diagnosis of avascular necrosis of femoral head in 1 patient detection rate (87.50%) was significantly higher than that of CT (56.25%), and the difference was statistically significant (χ2=3.96, P 0.05). The detection rate of MRI diagnosis for single cystic degeneration (93.75%) and CT (75.00%) had no significant difference (χ2=2.13, P>0.05). MRI in the diagnosis of bone trabecular structure fuzzy detection rate (75.00%) was significantly higher than that of CT (12.50%), and the difference was significant (χ2=12.70, P<0.05). Conclusion In the early diagnosis of osteonecrosis of the femoral head, MRI could detect changes of early avascular necrosis of the femoral head bone marrow edema and fat necrosis sensitively.MRI was superior to CT in accuracy, harmfulness and sensitivity.It could intuitively reflect the shape of lesions and pathological changes.So it could improve the overall level of diagnosis of osteonecrosis of the femoral head. Key words: Tomography, X-ray computed; Magnetic resonance imaging; Osteonecrosis of the femoral head; Diagnosis