pelvis · AP
Pelvis AP
Patient supine, MSP centred to table, legs extended.
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How to perform this view
- 01
Lay patient supine, arms on chest.
- 02
Ensure ASIS equidistant from table (no rotation).
- 03
Internally rotate legs 15-20 deg to put femoral necks in profile.
- 04
Tape or support feet in position.
- 05
Centre CR midway between ASIS and symphysis pubis.
- 06
Apply gonad shielding for males if it does not cover anatomy.
Anatomical & patient position
Patient: Patient supine, MSP centred to table, legs extended.
Part: Feet and legs internally rotated 15-20 deg (unless hip fracture suspected); ASIS equidistant.
Central ray & centring point
Perpendicular, midway between ASIS level and symphysis pubis (approx. 5 cm inferior to ASIS).
Exposure factors
kVp
75-85 kVp
mAs
15-25 mAs
SID
100 cm
IR size
35 x 43 cm landscape
Grid
Yes
Respiration
Suspended respiration
Clinical indications
- Pelvic trauma and fractures
- Hip arthritis, AVN
- Hip dysplasia follow-up
- Bone metastases, Paget's disease
Contraindications & precautions
- Pregnancy (relative) - confirm LMP / 10-day rule, justify exposure and shield where possible
- Suspected hip fracture - DO NOT internally rotate legs
Structures shown & evaluation criteria
- Pelvic girdle, L5, sacrum, coccyx
- Both femoral heads, necks and greater trochanters
- Lesser trochanters barely visible (correct rotation)