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grade 0: no mural thickening (<0.5 mm) and no mural contrast enhancement
grade 1: no mural thickening (<0.5 mm) and only slight mural contrast enhancement
grade 2: mural thickening (>0.6 mm) and prominent mural contrast enhancement
grade 3: strong mural thickening (>0.7 mm) and strong mural contrast enhancement
Case Discussion
Vessel wall imaging of scalp vessels in patients suspected of having giant cell arteritis can be graded from 0 to 3.
Grade 0 and 1 are considered "negative" whereas 2 and 3 are considered "positive".
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