Fig. 2
![Fig. 2](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12872-021-02076-5/MediaObjects/12872_2021_2076_Fig2_HTML.jpg)
Preoperative chest radiography and computed tomography in Case 1. Chest radiograph showing a cardiothoracic ratio (CTR) of 57%, and computed tomography (CT) demonstrates a severely calcified coronary artery
Preoperative chest radiography and computed tomography in Case 1. Chest radiograph showing a cardiothoracic ratio (CTR) of 57%, and computed tomography (CT) demonstrates a severely calcified coronary artery