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POSI II
femur and pelvis
| Question | Answer |
|---|---|
| Internal rotation to place femoral neck in profile — AP Femur (proximal femur) | 10–15° |
| Bottom of IR below knee joint — AP Femur (distal femur) | 2 inches |
| Top of IR placement — AP Femur (hip included) | ASIS level |
| Knee flexion — Lateral Femur (mediolateral, distal femur) | ~45° |
| Posterior roll of pelvis to avoid superimposition — Lateral Femur (proximal femur) | 10–15° |
| Length typically demonstrated — Lateral Femur | 3/4 of femur |
| Length of IR — AP Weight-Bearing Lower Limbs | 51 inches |
| Length of each grid section — AP Weight-Bearing Lower Limbs | 17 inches |
| Required SID to expose 51-inch IR — AP Weight-Bearing Lower Limbs | 8 feet SID |
| Height of riser for ankle visibility — AP Weight-Bearing Lower Limbs | 2 inches |
| Distance between legs — AP Weight-Bearing Lower Limbs | 20 cm |
| Medial rotation of feet/lower limbs — AP Pelvis & Upper Femora | 15–20° |
| Distance between heels — AP Pelvis & Upper Femora | 8–10 inches |
| IR centering reference — AP Pelvis & Upper Femora | 2 inches inferior to ASIS |
| IR centering reference — AP Pelvis & Upper Femora | 2 inches superior to pubic symphysis |
| CR angulation — Martz & Taylor Method (2nd projection) | 45° cephalad |
| Body obliquity — Judet Method (internal/external oblique) | 45° |
| CR entry — Judet Method: Internal Oblique | 2 inches inferior to ASIS |
| CR entry — Judet Method: External Oblique | Pubic symphysis |
| CR centering point — Lateral Pelvis (Right/Left) | ~2 inches above greater trochanter |
| Forward tilt of pelvis — Chassard–Lapine Method | 45° |
Created by:
yulyae