| Value | Code Name | Code | Code System | Code Description |
|---|---|---|---|---|
| 0 | Absence | Absence | ||
| 1 | "Caps" or pencil lining | "Caps" or pencil lining | ||
| 2 | smooth "halo" | smooth "halo" | ||
| 3 | Irregular periventricular hyperintensities extending into the deep white matter | Irregular periventricular hyperintensities extending into the deep white matter |