L-Spine
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L5/S1 Spot

IMAGE RECEPTOR
Patient position
Supine for AP; lateral recumbent for lateral.
Part position
MSP centered; knees flexed for AP to reduce lordosis.
Central ray
Iliac crest (L4).
IR placement
35x43 cm.

Tech pearls

  • Lateral L5/S1 spot often needs +5–10 kVp.
  • Sponge under waist on lateral keeps spine parallel to table.
LateralObliques