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. Author manuscript; available in PMC: 2024 Sep 8.
Published in final edited form as: JACC Cardiovasc Imaging. 2021 Mar 17;14(11):2226–2236. doi: 10.1016/j.jcmg.2021.01.008

FIGURE 5. Grad-CAM Localize Anatomy Contributing to CXR-Age.

FIGURE 5

Common activation areas included the mediastinum, cardiac silhouette, and the aortic knob, anatomy that dilates and becomes tortuous with aging (29). CXR-Age = chest x-ray age; Grad-CAM = gradient-weighted class activation maps.