Normal Atlanto-Temporomandibular Index Size on Radiography, CT, MRI
The atlanto-temporomandibular index normal value exceeds 22 mm on lateral imaging, serving as a key marker for craniocervical instability assessment.
Cervical
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Normal Boogaard's Angle Size on X-ray, CT & MRI
Normal Boogaard's angle measures less than 135° on lateral imaging; values at or above this threshold suggest basilar invagination or platybasia.
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Normal Cervical Basal Angle Size on X-ray, CT & MRI
Normal cervical basal angle ranges from 125–143° on lateral imaging; values outside this range may indicate platybasia or craniovertebral junction anomalies.
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Normal Klaus Index Size on X-ray, CT & MRI
The normal Klaus Index measures >30 mm on lateral cervical imaging, helping clinicians detect basilar invagination on X-ray, CT, and MRI.
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