The Representations of MRI Fat-suppression in Avascular Necrosis of Femoral Head / 实用放射学杂志

ABSTRACT

Objective To study the diagnostic significance of MR fat-suppression (FSEIR)in avascular necrosis of femoral head(ANFH).Methods MRI of 21 patients (12 men and 9 woman) with ANFH were reviewed . There were long-term steroid administration in 9 cases , long term alcoholic in 5 cases,fracture/dislocation of the hip in 4 cases and infection in 3 cases.General electric signa profile SYS#0.2 TMR unit and body coil were used for all examinations.Images in the axial plane and coronal plane,T_1-weighted images,T_2-weighted images and FSEIR were carried out.Results Totally 36 lesions in 21 patients,included 8 lesions of A type(fatlike),6 lesions of B type(bloodlike),10 lesions of C type(fluidike) and 12 lesions of D type(fibrouslike).On T_2WI,a rim of high signal intensity inside the low-signal margin (double line sign) was seen in 16 lesions.On FSEIR , A and D type exhibited low signal intensity , B and C type exhibited high signal intensity.Conclusion MR FSEIR is of important significance in showing the pathologic changes and guiding the clinical diagnosis and treatment of ANFH.