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Cone beam CT axial plane corresponding to the transepicondylar axis, used to measure the femoral component rotational angle. Note the photon starvation artefacts which hamper the detection of the femoral bone. They manifest as obvious alternated hypo-/hyperdense streaks, radiating from the metal prosthesis and opening-up in a fan-like manner. BF, biceps femoris muscle; GL, gastrocnemius lateral muscle; GM, gastrocnemius medial muscle; SA, sartorius muscle; SM, semi-membranosus muscle.
