False Profile hip
First, position the patient 90 degrees to the image receptor
Second, rotate the pelvis and feet from 90 degrees to form an approximately 65 degrees with the image receptor.
Image source:www.orthopaedia.com
Second, rotate the pelvis and feet from 90 degrees to form an approximately 65 degrees with the image receptor.
Image source:www.orthopaedia.com
False Profile Hip
*Important positioning notes *The femur of the affected side should be perpendicular to the floor. *The patient should NOT be leaning and the knee should be locked on the affected side. *The foot of affected side should be parallel to the image receptor. *The foot of unaffected side should be abducted and/or perpendicular to the image receptor. *The degree in obliquity will vary from patient to patient. Centering: the central ray should exit the hip of interest. Stand behind the x-ray tube to assess centering. Too much collimation light seen lateral to the affected side will indicate off centering (too much soft tissue). Film size: 8x10 or 10x12 in Radiation protection: Gonad shielding is a contraindication in males and females since it will obscure the anatomy. Criteria A false profile hip projection demonstrates anterior acetabular coverage of the femoral head . A false profile allows measurement of the anterior center-edge and shows evidence anterior subluxation while weight bearing. A properly positioned false profile hip image will demonstrate the "bullet-sign". The "bullet-sign" is the product of the superimposed ischial tuberosity of the affected side. |
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