"the opacification of pulmonary arteries is higher than that of the bronchial arteries and aorta, so the systemic flow will be seen as a low-density pseudo-filling defect or "pulmonary artery smoke" in the region of the anastomoses"
"the opacification of the aorta and bronchial arteries is higher than that of the pulmonary arteries, so a retrograde inflow, seen as contrast filling of the pulmonary arteries from the bronchial arteries in the site of the previous pseudo-filling defects"
"the pulmonary artery smoke will disappear in this phase, but the the retrograde inflow from the bronchial arteries will not be seen"
"high contrast medium concentration (e.g. 5.5 mL/s)"