Toes (oblique view)

Mr Andrew Murphy et al.

The toes medial oblique view is part of the toe series examining the phalange and metatarsals of 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 metatarsophalangeal joint in question
    • 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 at least the distal half of the metacarpal(s)

  • 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 

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

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 a closer resemblance to a DP projection of the foot. 

It's always good to label what toe you are imaging to avoid any confusion.

 

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Article Information

rID: 48354
Section: Radiography
Synonyms or Alternate Spellings:

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Cases and Figures

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    Figure 1: phalanx fracture of great toe
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    Figure 2: osteomyelitis
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