Giant Cell Arteritis Clinical Trial
Official title:
Cross-over, Randomized, Open-label, Single-centre, Phase II Clinical Trial to Investigate 18F-AzaFol in the Diagnosis of Large Vessel Vasculitis
The goal of this open-label clinical trial is to evaluate the efficacy of AzaFol-PET/CT in the diagnosis of GCA (giant cell arteritis), to compare AzaFol- with 2-[18F]FDG-PET/CT, and to assess the safety and tolerability of AzaFol in subjects with suspicion of GCA. Participants will undergo AzaFol-PET/CT imaging at a single timepoint.
Giant cell arteritis (GCA) is the most common systemic vasculitis in the elderly population. 2-[18F]Fluor-2-desoxy-D-glucose (2-[18F]FDG) positron emission tomography (PET)/ computed tomography (CT) is performed to diagnose GCA (standard of care, SOC) but unable to reliably distinguish atherosclerosis from vasculitis. Activated macrophages express folate receptor (FR)-β and are enriched in inflamed vascular tissue in GCA. 3'-Aza-2'-[18F]Fluoro-Folic Acid (AzaFol) is a nuclear tracer targeting FRβ. The investigators hypothesize that AzaFol is a specific and reliable tracer to visualize activated macrophages in GCA and therefore might improve the discrimination of vasculitic and atherosclerotic lesions as compared to 2-[18F]FDG-PET/CT. ;
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