Renal - AP Renal Area (Expiration)

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Radiographic Positioning


Adult
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Name of projection Renal - AP Renal Area
Area Covered Kidneys, proximal ureter
Pathology shown opaque renal stones, hydronephrosis
Radiographic Anatomy Abdomen Radiographic Anatomy
IR Size & Orientation 24 x 30 cm
Landscape
Film / Screen Combination Regular
(CR and DR as recommended by manufacturer)
Bucky / Grid Moving or Stationary Grid
Filter No
Exposure 75 kVp
35 mAS
FFD / SID 100 cm
Central Ray Directed to the midsaggital plane at the midpoint between the distal sternum and the lower costal margins
Perpendicular to the IR
Collimation Centre: To the midsaggital plane at the midpoint between the distal sternum and the lower costal margins
Shutter A: Open to include renal outline superiorly and inferiorly
Shutter B: Open to include the renal outlines laterally
Markers Inferior and Lateral
Marker orientation AP
Shielding Gonadal (check your department's policy guidelines)
Respiration On suspended expiration
(check departmental technique protocol)
Positioning
  • Patient is supine and positioned without rotation of the 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
Critique

Positioning
No rotation as evidenced by
  • the pedicles of the vertebrae are the same distance from the spinous processes on each side

Area Covered
  • Outline of the kidneys and the proximal ureter
Collimation
  • Centre: Approximately at the level of Lumbar vertebra L1
  • Shutter A: Open to include kidneys both superiorly and inferiorly
  • Shutter B: Open to include the lateral renal outlines
Exposure
There should be adequate exposure and no patient motion so that the following anatomy is demonstrated
  • the outline of the kidneys
  • skeletal structures such as the posterior ribs and vertebrae
Special Notes