Lateral View:
- because AP views of the hip may be difficult to interpret, it is necessary to
evaluate frog-leg lateral x-rays of the femoral head;
- cross-table lateral x-ray is not satisfactory because architectural details
of the femoral head are obscured by the soft tissues that overlie this area;
- lateral radiographs also allow staging purposes since it is often anterior segment
of the femoral head that first collapses or exhibits the crescent sign;
- because AP views of the hip may be difficult to interpret, it is necessary to
evaluate frog-leg lateral x-rays of the femoral head;
- cross-table lateral x-ray is not satisfactory because architectural details
of the femoral head are obscured by the soft tissues that overlie this area;
- lateral radiographs also allow staging purposes since it is often anterior segment
of the femoral head that first collapses or exhibits the crescent sign;
AP View:
- usually demonstrate the principal area of involvement;
- because anterior and posterior acetabular margins overlap the superior portion
of femoral head, subtle evidence of osteosclerotic or cystic changes in
subchondral regions may be missed;
- usually demonstrate the principal area of involvement;
- because anterior and posterior acetabular margins overlap the superior portion
of femoral head, subtle evidence of osteosclerotic or cystic changes in
subchondral regions may be missed;
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