Evaluation Criteria: Femur, Pelvic Girdle Flashcards
1
Q
What is the largest, heaviest bone in the body?
A
The femur
2
Q
What should you see on an AP femur?
A
- Proper collimation and marker showing overlap
- Most of the femur near the pathology and a smaller second projection of the other joint
- Femoral neck not foreshortened
- No knee rotation
- Any orthopedic appliance in its entirety
3
Q
Where is the ASIS located in relation to the femur?
A
3 to 4 inches above the femur
4
Q
Where is the pubic syphysis located?
A
At the level of the greater trochanter
5
Q
What are some reasons that we would take images of the pelvic girdle?
A
- Trauma
- Dislocations
- Hip Replacements
- Congenital Issues
- Arthritis
6
Q
What should you see on an AP pelvis?
A
- All of pelvis and proximal femur
- Symmetric: ilia, obturator foramen
- Ischial spines equally seen
- Sacrum and coccyx aligned with pubic symphysis
- Femoral necks not foreshortened
- Greater trochanters in profile
- Lesser trochanters mostly superimposed with femoral neck
7
Q
What should you see on an AP frog leg?
A
- No rotation of pelvis
- Lesser trochanter on medial aspect of femur
- Femoral neck without superimposition by the greater trochanter
8
Q
What should you see on a unilateral frog leg?
A
- Greater and lesser trochanter in profile
- Oblique of femoral neck
9
Q
What should you see on an AP hip?
A
- Proximal 1/3 of femur and symphysis
- Greater trochanter in profile
- No foreshortening of femoral neck
- Head of femur in acetabulum
- Lesser trochanter not seen
10
Q
What should you see on a lateral (Lauenstien) hip?
A
- Hip joint, acetabulum, and femoral head
- Femoral neck overlapped by greater trochanter
11
Q
What should you see on an Axiolateral Hip?
A
- Hip joint and acetabulum
- Femoral neck without overlap from greater trochanter
- Some of lesser trochanter on posterior femur
- Ischial tuberosity below femoral head and neck
- All of prosthetic
12
Q
How do you position a modified axiolateral hip?
A
- Possible post-op, trauma
- Patient on edge of table
- CR: 15-20° from horizontal, aimed perpendicular to femoral neck
- Grid cassette with 15-20° tilt
