McRae line
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McRae line is a radiographic line drawn on a lateral skull radiograph of skull or sagittalmidsagittal section of CT or MRI, joining the anterior (basion)basion and opisthion.
Normal position of the tip of dens is 5mm below this line. If the tip of the dens migrates above this line it indicates the presence of basilar invagination (atlanto-axial impaction).
-<p><strong>McRae line </strong>is a radiographic line drawn on a lateral radiograph of skull or sagittal section of CT or MRI, joining the anterior (basion) and posterior (opisthion) aspects of <a href="/articles/foramen-magnum">foramen magnum</a> .</p><p>Normal position of the tip of dens is 5mm below this line. If the tip of the dens migrates above this line it indicates the presence of <a href="/articles/basilar-invagination">basilar invagination</a> (atlanto-axial impaction).</p>- +<p><strong>McRae line </strong>is a radiographic line drawn on a lateral skull radiograph or midsagittal section of CT or MRI, joining the <a href="/articles/basion">basion</a> and <a href="/articles/opisthion">opisthion</a>.</p><p>Normal position of the tip of dens is 5mm below this line. If the tip of the dens migrates above this line it indicates the presence of <a href="/articles/basilar-invagination">basilar invagination</a> (atlanto-axial impaction).</p>
Systems changed:
- Central Nervous System
- Spine
- Head & Neck
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