Radiology Guides Anatomy Physio & Path Medicine Physics Contact


A. Alignment

  1. Main pelvic ring.
  2. Obturator ring.

B. Bones

  1. SI joint line: < 2mm.
  2. Arcuate lines.

Various alignment lines marked in red

  1. Symphysis pubis line: superior margins must allign and be < 5mm apart.

  2. Iliopectineal line.

  3. Ilioischeal line.

  4. Acetabular line.

S. Soft tissue

  • Assess for avulsion fractures at the greater and lesser traochanters.


1. Goodman, L. and Felson, B. (2015). Felson's principles of chest roentgenology. 3rd ed. Philadelphia, PA: Elsevier, Saunders.
2. Dähnert W. Radiology Review Manual. LWW. (2011) ISBN:1609139437. Read it at Google Books - Find it at Amazon
3. Elizabeth Puddy, Catherine Hill; Interpretation of the chest radiograph, Continuing Education in Anaesthesia Critical Care & Pain, Volume 7, Issue 3, 1 June 2007, Pages 71–75, https://doi.org/10.1093/bjaceaccp/mkm014

Ⓒ A. Manickam 2018

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