Foot (lateral view)

Dr Owen Kang and Mr Andrew Murphy et al.

The lateral projection is part of the three view series examining the phalangesmetatarsals and tarsal bones that make up the foot. 

The lateral projection additionally examines the talocrural joint.

  • the patient may be supine or upright depending on comfort 
  • the affected leg is externally rotated until the distal limb is parallel to the table, in many cases, the patient will have to half roll onto the affected side
  • the lateral aspect of the foot will be in contact with the image receptor 
  • the non-affected side is kept posterior to prevent over rotation 
  • foot is in slight dorsiflexion 
  • the planter surface should be perpendicular to the image receptor 
  • mediolateral projection
  • centring point
    • base of metatarsals or midfoot 
  • collimation
    • anteriorly from the skin margin of the distal phalanxes to extent of the skin margins of the most posterior portion of the calcaneus
    • superior to the talocrural joint 
    • posterior to the skin margins of the calcaneus
  • orientation  
    • landscape
  • detector size
    • 18 cm x 24 cm
  • exposure
    • 55-60 kVp
    • 4-6 mAs
  • SID
    • 100 cm
  • grid
    • no
  • the metatarsals are almost completely superimposed with only the tuberosity of the 5th metatarsal seen in profile 
  • the domes of the superior aspect of the talus are superimposed 
  • tibiotalar joint is open

If the patient has a larger distal limb it may be difficult to position it parallel to the image receptor, in these cases a foam block can be used to raise the height of the foot to maintain an optimal position. 

Anterior-posterior malalignment of the talar domes is due to over or under rotation of the foot. To adjust this, check the heel is not raised too far or alternately the toes if the patient cannot correct this position it can be aided with a small wedge sponge.

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Article information

rID: 44805
Synonyms or Alternate Spellings:
  • lateral foot
  • mediolateral foot

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Cases and figures

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    Case 1: normal foot x-rays
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