Wednesday, January 9, 2013

TAYLOR METHOD - AP axial Pelvis

Xray examination of the outlet of the perlvis. This method best demonstrate the anterior and inferior pelvic bones and presents an excesllent view of the bilateral pubes and ischia to allow assessment of pelvis trauma for fractures and diplacement. The patient position is supine with leg extended and place support under knees, provide pillow for head and patient's comfort. Gonadal shielding may be use if necessary and do not obscure the important part of pelvic anatomy. Collimate the light aperture diaphagm to 4 side of cassette. Instruct patient to suspend respiration when making exposure.

Technical Factors

  • IR size - 24 x 30 cm (10 x 12 inches), crosswise
  • Moving or stationary grid
  • 80 +- 5 kv range
  • 10 mAs 

Part Position:

Align midsagittal plane to CR and to midline to table and/or IR.
Ensure no rotation of pelvis (ASIS-to-tabletop distance equal on both sides).
Center IR to projected CR.

Central Ray:

Angle CR cephalad 20 to 35 degrees for males and 30 to 45 degrees for females. (These different angles are caused by differences in the shape of male and female pelvis.)
Direct CR to a midline point 1 to 2 inches ( 3 to 5 cm) distal to the superior border of the symphysis pubis or greater trochanters.
Minimum SID is 40 inches (100 cm)

Radiographic Criteria - Taylor Method

Structure Shown:

Superior and inferior rami of pubes and body and ramus of ischium are demonstrated well, with minimal foreshortening or superimposition.

Position, Collimation and Central Ray

No rotation: Obturator foramina and bilateral ischia are equal in size and shape.
Correct CR angle evidenced by demonstration of the anterior/inferior pelvic bones, with minimal foreshortening.
Midpoint of symphysis joint should be at center of collimated field.
Lateral margins of collimation field should extend equally on both sides to just lateral to the femoral heads and acetabula.
Superior and inferior margins of field should include the body and superior pubic rami and the ischial tuberosities, respectively.

Exposure Criteria:

Body and superior rami of pubes are well demonstrated without overexposure of ischial rami.
Body margins and trabecular markings of pubic and ischial bones appear sharp, indicating no motion.

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