Fig. 3.

Demonstration of the MR angiography images under different respiratory support: (a) a 4-year-old boy with endotrachial tube, (b) a 2-year-old girl with laryngeal mask, (c) a 2-year-old boy with nasal cannula, and (d) a 8-year-old girl without any respiratory support (awake). Excellent image quality was observed for all these cases, e.g., common hepatic arteries (a-d: black arrowhead, scored 5, 5, 5 and 4, respectively, by reader 1, and 4, 3, 5 and 5 by reader 2). The MR angiography image of a 6-year-old boy with metallic implant is shown in (e). Due to the metal artifacts, some of the arteries near the metallic implants (highlighted region) cannot be visualized well. Arteries that are far from the metallic implants, e.g., left external (a-e: black arrows) and internal (a-e: white arrows) iliac arteries, were not significantly affected