Hips – ‘frog-leg’ ventrodorsal canine X-ray positioning guide


Hips – ‘frog-leg’ ventrodorsal canine X-ray positioning guide



  • Position dog in lateral recumbency, lying on side you want to X-ray
  • Pull other leg back and secure
  • Ensure elbow is flexed to approximately 45° - avoid over-flexing
  • Use cotton wool or foam pads to ensure radius and humerus are parallel to plate
  • Centre over humeral condyle and collimate to 1/3rd of the way along radius/ulna distally and 1/3 of the way along humerus proximally
  • You may need to use ties or sand bags to ensure leg remains correctly flexed
  • Ensure L/R marker in primary beam.

What to look for

  • Ensure condyles are superimposed.

Top tips

  • Cotton wool is great for lateral elbow positioning as can be shaped to provide right level of support
  • If using a digital system remember to rotate image so that cranial is to the left

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