Classify MRI Artifact Grade

Maps integer grades 0–4 to an ordered factor:

• 0: none

• 1: mild

• 2: moderate

• 3: severe

• 4: non-evaluable

Usage

classify_artifact(grade)

Arguments

grade

Integer vector (0–4). Values outside this range produce NA with a warning.

Value

Ordered factor with 5 levels: none < mild < moderate < severe < non-evaluable.

Examples

classify_artifact(c(0, 1, 2, 3, 4))
#>             0             1             2             3             4 
#>          none          mild      moderate        severe non-evaluable 
#> Levels: none < mild < moderate < severe < non-evaluable