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Positioning of needle for hip joint aspiration/arthrography in three different patients. (A) Fluoroscopic image of left hip shows needle targeting medial aspect of femoral neck. (B) Fluoroscopic image of right hip shows needle targeting lateral aspect of femoral neck and normal distribution of contrast in joint. Note the relative lack of contrast opacification in region of zona orbicularis (ZO). (C) Fluoroscopic image of left hip shows partial opacification of the iliopsoas bursa.
