Fig. 2

Gadobutrol slow infusion setup. a Gadobutrol 0.1 mL/kg is diluted with saline to 5 (≤50 kg patient) or 7.5 mL (>50 kg patient). b When ready for 3D IR bSSFP iNAV imaging, the dilute gadobutrol is loaded into the extension tubing. The 3D IR bSSFP iNAV sequence is set up to image for approximately 4 to 5 total minutes. c Injector pump A is set to inject 0.5 mL at 2 mL/s, to overcome dead space/saline in the extension tubing. Injector pump B is set to inject 20 mL at 0.02 mL/s (≤50 kg patient) or 0.03 mL/s (>50 kg patient). The injection is started, and after a delay of 45–60 s, 3D IR bSSFP iNAV imaging is started