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Flowchart demonstrating the source of the 15 cases for reliability analysis. All 15 cases for inter-observer analysis were chosen from within the IST-3 angiography subgroup. The seven expert readers for inter-observer analysis were all members of the IST-3 image reading panel for the CTA substudy. Intra-observer analysis compares expert panel scan reads (from the same individuals) performed during the substudy with those performed for inter-observer analysis
