A 79-year-old woman falls at home and develops groin pain. Pelvic and hip radiographs show no fracture, but after analgesia she still cannot take four steps and has marked pain when the hip is gently rotated; there is no focal lumbar tenderness or neurological deficit. Her haemoglobin and inflammatory markers are normal. Which one of the following is the most appropriate next investigation?
Keep going — a set of ten like this one, one at a time.
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