Basion-Dens Interval (BDI)

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Synonyms
BDI

The Basion-Dens interval (BDI) describes the distance between Basion and Dens.

Measurement

The shortest distance from the Basion to the tip of the Dens is measured.

Normal Values

The following table shows the expected normal values for the BDI in healthy adults[^1] [^2]:

X-ray

CT

< 12 mm

< 8,5 mm

Imaging

Basion-dens interval
Basion-dens interval (BDI) on sagittal CT of the cervical spine (red line).

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Edit · Alaric Steinmetz ·

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Edit · Alaric Steinmetz · (+8 −8)
  • Text changed: “The basion-dens interval (BDI) describes the distance between Basion and Dens .”“The Basion-Dens interval (BDI) describes the distance between Basion and Dens .”
  • Text changed: “The shortest distance from the basion to the tip of the dens is measured.”“The shortest distance from the Basion to the tip of the Dens is measured.”
  • Text changed: “Normal values”“Normal Values”
  • Text changed: “The following table shows the expected normal BDI values for healthy adults[^1] [^2]:”“The following table shows the expected normal values for the BDI in healthy adults[^1] [^2]:”
  • Citation added: “Rojas CA, Bertozzi JC, Martinez CR, Whitlow J. Reassessment of the Craniocervical Junction: Normal Values on CT. American Journal of Neuroradiology. October 2007:1819-1823”
Edit · Alaric Steinmetz ·

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Article created on · Alaric Steinmetz

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