18 Questions
What should be the tube positioning if an image receptor is placed in the Bucky for femur imaging?
In the center lock
Why might a grid not be required for femur imaging in some patients?
They have small femurs
What is the purpose of using anode heel effect in femur imaging?
To compensate for varying tissue thickness
Which area should the cathode be positioned at for femur imaging?
Hip area
What must be included in the standard projections (AP LATERAL) for femur imaging on the initial examination?
Both joints
When imaging the proximal femur and hip, how should the limb be positioned to prevent foreshortening of the femoral neck?
Internally rotated 15°-20°
Where should the bottom of the image receptor (IR) be placed for a femur imaging procedure?
2 inches below the knee joint
Why is it important to include the entire prosthesis and 1.5 inches below it in femur imaging?
To detect fractures below the prosthesis due to excessive weight
How should a patient lie for a mediolateral lateral projection of the entire femur when non-traumatic imaging is required?
On their unaffected side
What should be done if the entire femur does not fit on one image receptor (IR) during imaging?
Keep the unaffected leg behind and roll the pelvis posteriorly
How can you prevent superimposition of femoral condyles during a lateral distal femur projection?
Use a horizontal beam with a grid
When performing a lateral proximal femur imaging, why should the unaffected thigh not overlap the proximal hip joint?
'To ensure proper alignment of the femoral shaft
What should be done to place the femoral neck parallel to the image receptor for a true AP of the proximal femur?
Rotate the femur internally 15° to 20°
What is the angle of the longitudinal plane of the femur from the vertical?
10°
What is the angle of the head and neck in relationship to the shaft of the femur?
15° to 20°
What field size is required for imaging the femur?
Two 14 x 17 and may also require two 10 x 12
What technique should be used for imaging the femoral shaft or proximal femur?
AP view
What is the purpose of using the anode heel effect in femur imaging?
To increase the penetration of the x-ray beam
Test your knowledge on radiography techniques including the use of grids, positioning of tube, gonadal shielding, anode heel effect, and standard projections. Understand important considerations for imaging patients with different body types and conditions.
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