AP Projection / View
Lat. Decubitus Position
- Abnormal masses, air-fluid levels, and possible accumulations of intraperitoneal air are demonstrated
- Small amounts of free intraperitoneal air are best demonstrated with chest technique on erect PA chest.
|Left Lateral Decubitus Abdomen|
- IR size 35 x 43cm (14 x 17 inches), crosswise to the table (lengthwise with the patient)
- Moving or stationary grid
- 70 to 80 kV range
- Place arrow or other appropriate marker to indicate "up" side.
- Use gonadal shielding on males.
- Lateral recumbent on radiolucent pad, firmly against table or vertical grid device (with wheels on cart locked so as not to move away from table)
- Patient on frm surface, such as a cardiac or back board, position under the sheet to prevent sagging and anatomy cutoff
- Knees partially flexed, one on top of the other, to stabilized patient
- Arms up near head; clean pillow provided
- Adjust patient and cart so that center of IR and CR are approximately 2 inches (5cm) above level of iliac crest (to include diaphragm).
- Promiximal margin of cassette will be approximately at level of axilla.
- Ensure no rotation of pelvis or shoulders.
- Adjust height of cassette to center midsagital plane of patient to center of IR, but ensure that upside of abdomen is clearly included on the IR.
- CR horizontal, directed to center of IR, at about 2 inches (or 5cm) above level of illiac crest
- Use of a horizontal beam to demonstrate air-fluid levels and free intraperitoneal air
- Minimum SID of 40 inches (100cm)
- Collimate on four sides; do not cut off upper abdomen.
- Make exposure at end of expiration.