Extent and distribution of calcification in the ascending aorta/arch by location, normalised by dividing quadrant totals by segment length. Extent and.

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Extent and distribution of calcification in the ascending aorta/arch by location, normalised by dividing quadrant totals by segment length. Extent and distribution of calcification in the ascending aorta/arch by location, normalised by dividing quadrant totals by segment length. (Segment 3 represents proximal aortic arch and therefore quadrant orientation changes, eg, anterior quadrant becomes superior quadrant.) Mean absolute values are calculated by averaging axial image scores for each quadrant within each segment. Maximum score of 5 (segment 1: sinotubular junction (STJ) to mid-way to the origin of the innominate artery; segment 2: from midpoint to the origin of the innominate artery; segment 3: origin of the innominate artery to the origin of the left subclavian artery (LSCA)). Thomas Snow et al. Open Heart 2018;5:e000703 ©2018 by British Cardiovascular Society