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3D time of flight MRA using radial-based gradient echo pulse sequence with modified DIXON of the aortic arch bifurcation

Takashi Namiki¹, Masami Yoneyama¹, Hiroshi Hamano¹, Tomohiro Mochizuki¹, Yuki Ito¹, Mai Nishihara¹, and Yasutomo Katsumata²
¹Philips Japan, Tokyo, Japan, ²Philips Healthcare, Best, Netherlands

TOF-RADIXON of the aortic arch bifurcation allows for more robust water and fat separation without additional motion compensation. Respiratory artifacts observed by TOF-MRA have been reduced, enabling accurate vascular evaluation.

Figure 1. Compared the TOF-MRA and TOF-RADIXON of three healthy volunteers in the source image. Left column, indicates signal loss in the vascular lumen (blue arrow). Mid column, breathing fat motion-artifact shows that the artifacts overlap the blood vessels (orange arrow). Right column, indicates loss of vascular signal due to respiratory motion-artifact (red arrow).

Figure 2. Compared the TOF-MRA and TOF-RADIXON of three healthy volunteers in the MIP images with a background cut by post-processing. In the TOF-MRA, due to the fat in the chest wall, it overlaps the MIP image as a white haze compared to the TOF-RADIXON.