10/08/2025
Grades of Disc Degeneration on MRI
🔹 Grade I
The disc is normal, well hydrated, and very bright on T2.
🔹 Grade II
Mild early changes, still bright on T2, nucleus clearly visible.
🔹 Grade III
Gray signal, moderate loss of hydration, unclear nucleus-annulus border.
🔹 Grade IV
Dark signal, significant dehydration, and reduced disc height.
🔹 Grade V
Collapsed disc, very dark signal, and severe degeneration
