Radiation exposure to breast tissue remains an important concern. Increased cardiovascular imaging use over the past two decades has increased radiation doses from cardiac imaging, particularly coronary computed tomography (CT). Breast attenuation particularly affects the anterior wall interpretation in the left anterior descending territory. Small LV size and breast tissue may decrease the diagnostic performance of myocardial perfusion imaging (MPI). 2,3 The reduced coronary artery size may decrease the non-assessable coronary segments, especially in the mid- to distal coronary vessels. Women on average have smaller coronary artery size, left ventricle (LV) chamber size, and greater chest wall attenuation. 1 A number of differences exist between men and women in cardiac imaging. Cardiac disease is one of the leading causes of death for women in the United States, killing one in three women in 2018.
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