Equine radiography – the palmaroproximal-palmarodistal (‘skyline’) view of the distal sesamoidean (‘navicular’) bone

A case study explaining the indications, preparations and technique required to carry out a radiograph of the foot for equine practice.

Save to MyBCF
DSC08932

Equine radiography – the palmaroproximal-palmarodistal (‘skyline’) view of the distal sesamoidean (‘navicular’) bone

Indications
• Investigation of lameness caused by foot pain (as determined by perineural anaesthesia).
• Pre-purchase examinations.
• Investigation of traumatic/penetrating wounds of the foot (especially the solar surface).
• Monitoring progression of disease.

Preparation
• Remove the shoe, if present.
• Ensure foot is trimmed to remove all loose horn.
• Ensure foot is picked out, clean and free from dirt.
• Pack the lateral sulci of the frog with Play-Doh (avoiding excess packing).

Technique

 

Image from Bulter, JA et al (2008) Clinical Radiography
of the Horse.
3rd ed. Chichester: Wiley-Blackwell

  • Bring the limb to be radiographed caudally as far as possible and ensure the horse is bearing weight on the contralateral forelimb. (This may require sedation and/or regional anaesthesia if the foot pain is pronounced.)
  • Place a reinforced cassette tunnel (with cassette in place!) under the foot to be radiographed, and position the foot towards the ‘caudal’ end of the cassette tunnel.
  • Centre the beam between the heel bulbs and angle parallel to the flexor surface. (Approximately 45o.)
  • N.B. This positioning may be difficult because:
  • If the beam is angled too ‘upright’ the ergot becomes superimposed over the navicular bone.
  • If the beam is angled to ‘low’ the flexor cortex is artificially thickened and its border with the medulla becomes less distinct, mimicking pathology.
  • The generator will be positioned up against the body wall which can make correct positioning difficult or impossible in overweight animals.

 

 

IMV imaging on YouTube

IMV imaging YouTube

By continuing to use our website, you are agreeing to our privacy and cookie policy which can be viewed here’