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abdomen · AP (L Lat Decubitus)
Abdomen Left Lateral Decubitus
Patient lying on left side on radiolucent pad, back against vertical IR.
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AI Patient · KV Sir
How to perform this view
- 01
Place patient on left side for minimum 5 minutes.
- 02
Raise arms above head, flex knees.
- 03
Place vertical IR against back, centre 5 cm above iliac crest.
- 04
Horizontal beam, include right hemidiaphragm (upper side).
- 05
Expose on expiration.
Anatomical & patient position
Patient: Patient lying on left side on radiolucent pad, back against vertical IR.
Part: Arms raised above head; knees flexed; MSP centred to IR.
Central ray & centring point
Horizontal, perpendicular to IR, 5 cm above iliac crest on MSP.
Exposure factors
kVp
75-85 kVp
mAs
20-30 mAs
SID
100 cm
IR size
35 x 43 cm landscape (relative to table)
Grid
Yes
Respiration
Suspended expiration
Clinical indications
- Free air in patients who cannot stand
- Air-fluid levels
Contraindications & precautions
- Pregnancy (relative) - confirm LMP / 10-day rule, justify exposure and shield where possible
- Inability to lie on side
Structures shown & evaluation criteria
- Upper (right) lateral abdominal wall and diaphragm
- Free air between liver and abdominal wall