The Research Of Imageology For Femoro-Acetabular Impingement

Objective:To probe the standard of early diagnosis of FAI, and the imageology appearance of 16 row spiral CT noncontrast enhanced scan and three-dimensional reconstruction, and MRI of progression of FAI patients. To approach the significance of using the imageology result to identity doubtful FAI patients with other patients.Methods:Choose six FAI patients. CT and MRI noncontrast enhanced scan and CT three-dimensional reconstruction were performed to assess the hip joint. The CT scan was performed on the GE Lightspeed 16 row spiral at 1.25 mm slice reconstruction. The MRI scan was performed on the Siemens Avanto 1.5T supraconduction magnetic resonance meter. The CT and MRI scan included the acetabulum to the lesser trochanters.Results:1. The results of DR of pelvis orthophoria: The detection rate of bone ecphyma of femoral head neck junction was 100%; The detection rate of non-buninoid femoral head was 66.67%; The detection rate of hyper-deep of hip wsa 16.67%; The detection rate of"x-ray sign"of acetabular hypsokinesis was 33.33%; The detection rate of ossific acetabular labrum was 100%.2. The result of 16 row spiral CT noncontrast enhanced scan and three-dimensional reconstruction: The detection rate of the degrade of anterior lateral offset of the femoral head neck junction was 100%; The detection rate of ossific acetabular labrum was 100%;The detection rate of osteophyma around the hip joint was 100%.3. The result of MRI noncontrast enhanced scan: The detection rate of hydrops articuli was 83.33%; The detection rate of phlegmonosis of acetabular labrum was 16.67%; The detection rate of ossific of cartilage was 16.67%; The detection rate of cystis of cartilage was 16.67%; The detection rate of laceration of acetabular labrum was 16.67%.Conclusions:1. Non-buninoid femoral head, hyper-deep of hip, acetabular anteversion and hypsokinesis, and reunion the patients‵typical sings and symptoms to early and exactitude diagnosis.2. Anterior lateral offset of the femoral head neck junction can be direct-viewed by 16 row spiral CT three-dimensional reconstruction, providing straight reference operation schedule.3. The result of midanaphase patients‵MRI noncontrast enhanced scan can detect laceration of acetabular labrum, proid certain evidence for operation of laceration of acetabular labrum.4. The result of MRI noncontrast enhanced scan can detect FAI with early avascular necrosis of the femoral head.