Grade | Lesion uptake ratio |
---|---|
Grade 0 | Lesion uptake < 20% mediast. uptake |
Grade I | Lesion uptake < 80% mediast. uptake |
Grade II | Lesion uptake > 80% and < 120% mediast. uptake |
Grade III | Lesion uptake > 120% mediast. and < 80% liver uptakes |
Grade IV | Lesion uptake > 120% liver uptake |