Position of part Adjust body to center ASIS of affected side to midline of grid. Position of patient Supine. Have patient suspend respiration for exposure. Purpose and Structures Shown Pelvis, femoral neck without superimposition, and lesser trochanter on medial side of femur. When flexion of body is restricted, direct CR anteriorly, perpendicular to coronal plane of pubic symphysis. Average patient can achieve this degree of flexion without strain. Have patient grasp ankles to aid in maintaining position.Ĭentral ray Perpendicular through lumbosacral region at level of greater trochanters. Instruct patient to lean directly forward until pubic symphysis is in close contact with table vertical axis of pelvis will be tilted forward about 45 degrees. To prevent thighs from limiting flexion of body too greatly, have patient abduct them as far as end of table permits. If needed, place a stool or other suitable support under feet. If patient is seated on end of table, center midsagittal plane of body to midline of grid. Position of part If patient is seated at side of table, place longitudinal axis of IR perpendicular to midsagittal plane. Position of patient Seat patient well back on end or side of table so posterior surface of knee is in contact with edge of table. Have patient suspend respiration for exposure. Shows the axial projection of pelvis and the relationship between femoral heads and acetabula, pelvic bones, and any opacified structure within pelvis. Purpose and Structures Shown For measuring horizontal, or bi-ischial diameter in pelvimetry. To determine relationship of femoral head to acetabulum. To demonstrate opacified rectosigmoid portion of colon. Upright position Place patient in lateral position in front of a vertical grid device, and center midcoronal plane of body to midline of grid. Have patient stand straight, with weight of body equally distributed on feet so that midsagittal plane is parallel with plane of IR. If limbs are of unequal length, place support of suitable height under foot of short side. Have patient grasp side of stand for support.Ĭentral ray Perpendicular to a point centered at level of soft tissue depression just above the greater trochanter about 2 inches (5 cm) and to midpoint of image receptor. A pillow or other support between knees promotes stabilization and patient comfort. Some scholars recommended a dorsal decubitus lateral projection of pelvis for demonstration of “gull-wing sign” in cases of fracture dislocation of acetabularrim and posterior dislocation of femoral head. If vertebral column is allowed to sag, it will tilt pelvis in longitudinal plane. Adjust pelvis in true lateral position, with ASIS lying in same vertical plane. Place one knee directly over other knee. Position of part Recumbent position. When patient can be placed in lateral position, center the midcoronal plane of body to midline of grid. Extend thighs enough to prevent femur from obscuring pubic arch. Place support under lumbar spine, and adjust it to place vertebral column parallel with tabletop. Position of patient Place patient in lateral recumbent, dorsal decubitus, or upright position. Have patient suspend respiration for exposure. Purpose and Structures Shown Clear image of lateral pelvis. Lumbosacral junction, sacrum, coccyx, superimposed hip bones, and upper femur. Video Credit : TheXra圜hic Pelvis Lateral Left or Right If pelvis is deep, palpate for iliac crest and adjust position of IR so that its upper border will project 1 to 1.2 inches (2.5to3.8cm) above crest.Ĭentral ray Perpendicular at midline of patient about 2 inches (5cm) inferior to ASIS and 2 inches (5cm) superior to pubic symphysis in average-sized patients. Heels should be placed about 8- 10 inches (20 to24cm) apart. Immobilize legs with sandbag across ankles, if needed. Check distance from ASIS to table top on each side to be sure that pelvis is not rotated. Center IR midway between ASIS and pubic symphysis. Unless contraindicated due to trauma or pathologic factors, medially rotate feet and lower limbs about 15 -20 degrees to place femoral necks parallel with plane of the IR. Medial rotation is easier for patient to maintain if knees are supported. Position of patient Supine position. Have patient suspend respiration for exposure. Purpose and Structures Shown Clear image of entire pelvis. Also demonstrates head, neck, trochanters, and proximal one third or one fourth of shaft of femur. This article discusses radiographic positioning to show the hip and pelvis for the Radiologic Technologist (X-Ray Tech).
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