CRP and temporal arteritis: In addition, they found a positive correlation of Halo counts and Halo Scores with systemic inflammation, ie ESR and CRP, a finding subsequently confirmed also by Collada et al.6 Our retrospective evaluation of TAXA US images in patients with diagnosed GCA did not identify any correlation between Halo count or score and ischaemic ocular symptoms, jaw claudication, 6-month relapse risk or inflammatory markers.