Fig. 4

Measurement of cardiothoracic area ratio. (a) Original image; (b) Extraction of heart and chest masks; yellow: heart; green: chest; (c) Fitting ellipse and calculating CRT; yellow: heart; green: thoracic cavity
Measurement of cardiothoracic area ratio. (a) Original image; (b) Extraction of heart and chest masks; yellow: heart; green: chest; (c) Fitting ellipse and calculating CRT; yellow: heart; green: thoracic cavity