For hip DXA imaging, what projection is used?

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Multiple Choice

For hip DXA imaging, what projection is used?

Explanation:
True AP projection is used in hip DXA because the goal is a consistent anterior-posterior view with minimal rotation. This alignment keeps the femoral neck in a stable orientation relative to the detector, reducing magnification and geometric distortion, which leads to reproducible, comparable areal BMD measurements across scans and with reference data. Lateral, oblique, or PA projections introduce varying angles, overlapping structures, or different path lengths through bone and soft tissue, all of which distort the measurement and hinder comparability.

True AP projection is used in hip DXA because the goal is a consistent anterior-posterior view with minimal rotation. This alignment keeps the femoral neck in a stable orientation relative to the detector, reducing magnification and geometric distortion, which leads to reproducible, comparable areal BMD measurements across scans and with reference data. Lateral, oblique, or PA projections introduce varying angles, overlapping structures, or different path lengths through bone and soft tissue, all of which distort the measurement and hinder comparability.

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