CRP and rheumatoid arthritis: FDG uptake in arterial walls, a sign of vascular inflammation, is higher in RA patients with rheumatoid nodules or anti-cyclic citrullinated peptide (anti-CCP) seropositivity and has a strong correlation with systemic inflammation markers such as high-sensitivity C-reactive protein (hs-CRP; r = 0.58, p = 0.04) [3]. Serial CMR or PET-CT imaging can monitor therapeutic response by tracking changes in myocardial inflammation or vascular uptake over time, particularly in patients on biologic agents or corticosteroids.