Pelvis Positioning

• AP surface landmark: Naval

  • vertebral level: L4
  • internal anatomy: bifurcation of abdominal aorta into common iliacs
  • lymph nodes:
  • end of para - aortic
  • start of common iliac
• AP surface landmark: Iliac crest

  • vertebral level: L4 / L5 interspace
  • internal anatomy: bifurcation of abdominal aorta
  • lymph nodes:
  • common iliac
• AP surface landmark: ASIS

  • vertebral level: L5 - S1
  • internal anatomy:
  • bifurcation common iliac into external and internal iliacs
  • origin of inferior vena cava
  • ovaries
  • lymph nodes:
  • external iliac
  • internal iliac
  • sacral
• Vertebral levle: Sacrum

  • internal anatomy:
  • bladder
  • femoral heads
• AP surface landmark: greater trochanter

  • vertebral level: tip of coccyx
  • internal anatomy:
  • prostate
  • cervix
  • upper border of pubic symphysis
  • lymph nodes:
  • inguinal nodes
  • obturator nodes
• AP surface landmark: base of penis / vaginal commissure

  • vertebral level: n/a
  • internal anatomy:
  • lower border of pubic symphysis
  • pelvic floor
  • lymph nodes:
  • femoral