What is the standard position for the femurs in relation to the table during a DXA scan?

• A. Angled 30 degrees forward
• B. As vertical as possible
• C. Flat against the table surface
• D. Rotated outward 10 degrees

Answer: (B)

During a DXA scan, the standard positioning of the femurs is crucial for obtaining accurate measurements of bone mineral density. Positioning the femurs as vertical as possible minimizes the angle of the femoral neck in relation to the X-ray beam and helps ensure that the projections are properly aligned along the axis of the bone structure being measured. This position enhances the quality and reliability of the scan results by reducing potential artifacts and variations in density readings caused by improper angulation.

When the femurs are positioned vertically, the DXA system can produce a clearer and more precise image of the hip region, allowing for better assessment of bone health and potential osteoporosis. Thus, this correct positioning is integral to standard practices in bone densitometry, ensuring that the diagnostic outcomes reflect the true bone mineral density of the patient.