![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgZR5EB9gc42sH5nVZJp6-hk4DBlo6rDEi3iJ9RcKLfKwPt6dEhrWUOJgk37kF4xFY-0Wj6OWE3VsZB-TEqXyNppjZBD0NVvEekTmNC-KdElzajwHn8ztFEhngnJrNXZFc4XB1yFkORd6g/s320/crsnt3.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEihsedtWUDSK6s9lkcCu2QojWdqIP-NFNSwNtWeR2JVqSpr5Zsjwohx4P3wwlLDIVUEFMEh9MYZbwb2trwSuTA-mWDGDvxuvMCJ9AAw4kG1PDlZhllUhlpgJonyeSlGuIB_B0xEpCQ_y6o/s320/crsnt4.jpg)
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![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj0OgSrPyHpdzvRMK6wL3IPcHbsM8doBLLe-OnxRMRgQuPmVE2izHGbhihPqj0ovIpcD9oGl707OOTZwwcFfO19YdewiQeMqqMAl1M295LmuTmgSk6n64my3Pfhkb2fvaEpgp6GrMuYrlw/s320/crsnt2.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj-LAHXq5k0IS1WoXkRvr-Lxkm82LDuk4wi9Gx81BvTSTz7NfpP_qycUDPrW3QgG7ruouWfs9s5D7hAGur-_jjebHUYGWPyBqXIOZWKr07Sf1Riht263Lw-Qud7PGog4u0b1FJFhYQPlOk/s320/crsnt3.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhJOvlguPsrkxreBsDBKQlUNuuGwlO1RzhtQsAfnK3lF2L23wPlrt6UtJtlYJtMu9qLFeFevS9VAXjLAYDE0rVHJjTx6KIpOn1B3cwPJ_7J2u-3lyixzIUGtrTY9R5rWjAvggeTJV7fGvs/s320/crsnt4.jpg)
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![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj-LAHXq5k0IS1WoXkRvr-Lxkm82LDuk4wi9Gx81BvTSTz7NfpP_qycUDPrW3QgG7ruouWfs9s5D7hAGur-_jjebHUYGWPyBqXIOZWKr07Sf1Riht263Lw-Qud7PGog4u0b1FJFhYQPlOk/s320/crsnt3.jpg)
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;
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjoxIpnoPr3t8VAKMS0k2JkuMaCm4ImBoBj_Gz6r7_2x1Qnr40yHhUP8_P4Z-4AU1dxkBz72g_6Ki3JKj9WNjvFof6dS8WsDQGlfeX7o3s3oxnS-guDgmqOZE41qzJrOnTdxWqY-fRUvnk/s320/avn10.jpg)
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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