Abdomen - ProneThis is a featured page

Radiographic Positioning


Adult
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Name of projection Abdomen - Prone
Area Covered The diaphragm, abdomen, pubic symphysis
Pathology shownBowel obstruction, inflammatory bowel disease, volvulus, organomegaly, pneumoperitoneum, tumour and ascities
Radiographic Anatomy Abdomen Radiographic Anatomy
IR Size & Orientation 35 x 43 cm
Portrait
D.R. may cover 43 x 43 cm
Film / Screen Combination Regular
(CR and DR as recommended by manufacturer)
Bucky / Grid Moving or Stationary Grid
FilterNo
Exposure 75 kVp
35 mAs
FFD / SID 100 cm
Central Ray CR directed to the midsaggital plane at the level of the iliac crests
Perpendicular to the IR
Collimation Centre: To the midsaggital plane at the level of the iliac crests
Shutter A: Open to include the pubic symphysis inferiorly
Shutter B: Open to include the lateral skin margins
Markers Inferior and Lateral
Marker orientation PA
Shielding Gonadal for males (check your department's policy guidelines)
RespirationSuspended on expiration - this lifts the diaphragm and presents the abdominal contents in a more relaxed state. (check your departmental technique protocol)
Positioning
  • Patient is prone on the table
  • Cushion for head
  • Patient's arms slightly abducted from the torso
  • Positioned without rotation of the pelvis and torso
  • Ensure there are no artefacts such as zips or buttons over the area being imaged
  • Centre the midsaggital plane of the patient to the midline of the IR
  • CR directed to the midsaggital plane at the level of the iliac crests
Critique

Positioning
No rotation as evidenced by
  • symmetrical iliac wings
  • the obturator foramina are both open and symmetrical
  • the sacrum is centred in the pelvic inlet
  • the pedicles of the vertebrae are the same distance from the spinous processes on each side
Area Covered
  • The diaphragm to pubic symphysis
Collimation
  • Centre: L4 Lumbar vertebra, which is at the level of the iliac crests
  • Shutter A: Open to include the pubic symphysis inferiorly and diaphragm superiorly
  • Shutter B: Open to include the lateral skin margins if possible
Exposure
There should be adequate exposure and no patient motion so that the following anatomy is demonstrated
  • the outline of the psoas muscles
  • the outline of the kidneys
  • skeletal structures such as the posterior ribs, vertebrae and pelvic anatomy
Special Notes



AndyC
AndyC 		Latest page update: made by AndyC , Jun 9 2011, 5:05 AM EDT (about this update About This Update AndyC Edited by AndyC

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