Why is the hip positioner used during scanning of the proximal femur?

• A. To stabilize the pelvis
• B. To reduce radiation exposure
• C. To place the femoral neck parallel to the tabletop
• D. To visualize the entire femur

Answer: (C)

The use of a hip positioner during the scanning of the proximal femur is primarily to ensure that the femoral neck is positioned parallel to the tabletop. This alignment is crucial for obtaining accurate and consistent bone mineral density measurements. When the femoral neck is parallel, it helps to minimize the impact of positioning errors, which can lead to variability in the scan results. Accurate positioning is essential for ensuring reproducibility in measurements, thereby aiding in the reliable assessment of bone health and the detection of conditions such as osteoporosis.

Positioning the hip correctly also facilitates a more precise visualization of the area of interest, allowing the densitometry equipment to obtain clearer and more accurate readings. Proper placement contributes to the overall quality of the scan and reinforces the importance of careful patient positioning in achieving high-quality diagnostic images.