Fig. (1) A. Cardiac computed topographic angiography with volume rendering technique demonstrating the proximity between the pulmonary artery and the left main coronary artery (yellow arrow). B. Measurement of transverse diameter of pulmonary artery, 3 cm above the aortic root (PAD – red arrow). (AO: Aorta, PA: Pulmonary Artery, LMCA: Left Main Coronary Artery).