Fig. 2

Figure depicts a novel passive tracking technique using a pSAT angle of 40^° at different flip angles to optimize imaging for iCMR. The upper row shows the gadolinium-filled balloon alone, the middle row shows the gadolinium-filled balloon and MR-conditional guidewire separate but within the same image, and the bottom row shows an MR-conditional guidewire markers within the gadolinium-filled balloon. The imaging acquisition scan duration time (ms) begins to increase at a FA > 45^°. Dashed White Arrow– Gadolinium-filled balloon;Solid White Arrow– MR-conditional guidewire;Thick White Arrow– MR-conditional guidewire markers within the gadolinium-filled balloon.Yellow box- Ideal in-vivo flip angle combination (pSAT angle = 40^°; FA = 35^°) to simultaneously visualize the catheter balloon tip, MR-conditional guidewire, and cardiac/vessel anatomy during iCMR procedures. Note: No decrease in image acquisition time was seen at FA < 45^°