My notes during radiology residency, fellowship, and beyond…
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Divide axial disc into 4 quadrants of 25%:
Focal Herniation = <25% [pic] (protusion type or extrusion type) [pic]
Broad based Herniation = 25-50% [pic]
Bulge = >50% normal disc circumference.
Symmetric Disc Bulging = 100% [pic]
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Written by lmwong
January 5, 2011 at 4:00 pm
Posted in classification, neuro, spine
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