Quinn KA, et al. - Authors evaluated the agreement between the interpretation of magnetic resonance angiography (MRA) and ¹⁸F-fluorodeoxyglucose positron emission tomography (PET) for disease extent and disease activity in large-vessel vasculitis (LVV). They also determined relationships between imaging and clinical assessments. Unique and complementary information was contributed by MRA and PET in the assessment of LVV. Disease extent was seen to be better captured by MRA. PET scan was better suited to evaluate vascular activity. Researchers noted that there was often no correlation between clinical and imaging-based assessments over the disease course in LVV.