The heels should be 8-10 inches (20-24 cm) apart. This is done to overcome the normal anteversion of the femoral necks and to place their longitudinal axes parallel to the film. The feet are placed in approximately 15°-20° of internal (medial) rotation.The distance from tabletop to each anterior superior iliac spine (ASIS) should be equal. There should be no rotation of the pelvis. The midsagittal plane of the body should be centered to the midline of the grid device.Placing a support under the head and knee helps to relieve the strain on the patient while in the supine position. The patient is positioned supine on the radiographic table, with arms placed at the side or across the upper chest.Positioning for the AP pelvis (bilateral hips) projection Surface-to-image distance (SID) of 40 inches (100 cm).Image receptor (IR): 14 x 17 inch (35 x 43 cm) crosswise.Varus and valgus configuration of a femoral neck fracture is said to occur if there is decrease or increase, respectively, in this angle. Normally, the angle formed by these axes ranges from 125°-135°. This view also demonstrates an important anatomical relationship in the longitudinal axes of the femoral neck and shaft. Most traumatic conditions involving the sacral wings, the iliac bones, ischium, the pubis, and the femoral head and neck can sufficiently be evaluated on the AP projection of the pelvis and hip. The standard radiographic view for the pelvis is obtained in an AP position with the patient supine. Special radiographic projections are performed to evaluate the SI joints, sacral bones, and acetabulum. The AP view is frequently not sufficient to provide adequate evaluation of the entire sacral bone, the sacroiliac (SI) joints, and the acetabulum. AP oblique pelvis (the “frog leg”) projections are commonly performed on non-trauma patients to evaluate congenital hip dislocation. If you'd like to comment on or contribute to this series, please e-mail standard radiographic projections used to evaluate injury to the pelvic girdle and proximal femur include the anteroposterior (AP) pelvis (bilateral hips) and AP unilateral hip. If they are blurred or unclear, the X-rays may need to be redone.This article is the 16th in our series of white papers on radiologic patient positioning techniques for x-ray examinations. To wait a few minutes while the images are processed. If you have an injury or are in pain and can't stay in the required position, the technician might be able to find anotherĪfter the X-rays are taken, you will be asked The positions required for the X-rays mayįeel uncomfortable, but they need to be held for only a few seconds. The X-ray room may feel cool due to air conditioning used to maintain the equipment. You won't feel anything as the X-rays are The technician will return to reposition the patient for each X-ray Two X-rays are usually taken, one with the legs straight (AP view) and one with the knees apart andįeet together (frog leg view), which is how the lateral view usually done. The patient on the table, then step behind a wall or into an adjoining room to operate the machine. The technician or radiologist will position Your child's reproductive organs will also be protected with a lead shield. If you stay in the room while the X-ray is being done, you'll be asked to wear a lead apron to protect certain parts of yourīody. Parents are usually able to accompany their child to provide reassurance. You may be asked to lie down for this exam. Minutes or longer, actual exposure to radiation is usually less than a second. ![]() Typically X-rays of both hips are taken for comparison, even if only one hip is causing the symptoms. View, also known as the frog leg lateral view). Two different pictures are usually taken of the hip: one from the front (anteroposterior view or AP), and one from the side (lateral An X-ray technician takes the X-rays.Īn X-ray technician in the radiology department takes the X-rays. Softer body tissues, such as the skin and muscles, allow the X-ray beams to pass Denseīody parts that block the passage of the X-ray beam through the body, such as bones, appear white on the X-ray image. This image shows the soft tissues and the bones of the pelvis and hip joints. During the examination, an X-ray machine sends a beam of radiation through the pelvicīones and hip joints, and an image is recorded on a computer or special film. Uses a small amount of radiation to make images of a person's hip joints (where the legs attach to the pelvis). A hip X-ray is a safe and painless test that
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