“…Before the 2nd series ssBACE, all patients underwent e-CT angiography again to evaluate possible HRAs for procedural planning [5,6,9,16,19]. Primary signs of a possible HRA consisted of dilatation of the vessel compared to the normal size for that site, tortuosity of the vessels, direct shunting of vessels, aneurysmal formation, pleural adhesion, ground glass opacity suggesting inhaled blood, and new enhancement of the distal part of the HRA embolised at the 1st series ssBACE [1,5,6,8,9,16]. Considering the normal arterial vessel size, we defined relatively large-diameter HRAs as those occurring in the bronchial, intercostal and internal thoracic arteries, and relatively small-diameter HRAs as those occurring in all other arteries.…”