X-RAY OF FEMUR
X-ray Femur A/P View
Femur AP
Region: femur
Pathology: fracture and bony lesion of femur
SID: 100 cm (40 inches)
Central Ray: perpendicular beam directed at the center of femur
Respiration: suspended
Position:
1. The patient is placed in a supine
position.
2. Place femur at
the center of image receptor (IR).
3. To show knee and femur in true antero-posterior projection image, rotate the
leg about 5° medially.
Collimation: Include femur and knee joint.
Evaluation:
1. Femur must be immobilized in true
antero-posterior projection image.
2. Femoral
condyles should be aligned symmetrically with the patella in
the center.
kVp-70, mAs-16
Tip:
1. In order to see neck
of femur, rotate the leg about 15°~20° in medial direction.
X-ray Femur Lateral View
Femur Lateral
Region: femur
Pathology: fracture and bony lesion of femur
SID: 100 cm (40 inches)
Central Ray: perpendicular beam directed at the femur
Respiration: suspended
Position:
1. The patient is placed either in a lateral decubitus position or in a supine position.
2. Flex the knee of filming side 45° and place bilateral condyles of femur perpendicular to the image receptor (IR).
3. Place the nonfilming leg in front to avoid overlap with the filming leg.
4. Adjust the bottom line of the IR 5cm distal to the knee.
Collimation: Include femur and knee joint.
Evaluation:
1. Patella should be shown in oblique image.
2. Neck of femur and greater trochanter must overlap completely.
kVp-70, mAs-16
Tip
