Foot (medial oblique view)

Mr Andrew Murphy et al.

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

  • the patient may be supine or upright depending on comfort
  • the affected leg must be flexed enough that the plantar aspect of the foot is resting on the image receptor
  • the foot is medially rotated until the planter surface sits at a 45° angle to the image receptor
  • AP oblique projection

  • centring point

    • X-ray beam centred to the base of the 3rd metatarsal

    • the beam will be perpendicular to the image receptor 

  • collimation

    • lateral to the skin margins

    • anterior to the skin margins of the distal phalanges

    • posterior to the skin margins of the calcaneum

  • orientation  

    • portrait

  • detector size

    • 18 cm x 24 cm

  • exposure

    • 50-55 kVp

    • 3-4 mAs

  • SID

    • 100 cm

  • grid

    • no

Superimposition is evident at the bases of the of 1st and 2nd metatarsals 

Their is no superimposition of the 3rd to 5th metatarsal

The base of the 5th metatarsal is free of superimposition from any structure 

Tarsal sinus is visible 

The joint spaces around the cuboid are open and equal

Cuboid is free of superimposition

The metatarsal and tarsal bones are the most reliable rotation indicator.

If the foot is over rotated the base of the 5th metatarsal will be superimposed by the tubercle of the 4th metatarsal.

If the foot is under rotated the bases of the 4th and 5th metatarsals will overlap; the image may have closer resemblance to the DP projection.  

 

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Article information

rID: 44803
Section: Radiography
Synonyms or Alternate Spellings:
  • Medial oblique foot
  • oblique foot

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Cases and figures

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    Foot superior vie...
    Figure 1: lower limb bones
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    Case 1: normal foot series
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    Foot medial / lat...
    Figure 2: lower limb bones
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    Case 2: Charcot foot
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