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Abstract #5011

Efficient Navigator-Gated Acquisition of Different Breathing Positions During Free Breathing Applied to Flow Measurements in the Great Vessels

Sebastian Gruhlke1, Michael Markl1, Bernd Andr Jung1

1University Hospital Freiburg, Freiburg, Germany

To investigate physiological effects of the breathing position on blood flow, a double navigator-gated sequence was implemented defining two acceptance windows during expiration and inspiration. The method permitted to acquire flow sensitive phase contrast MRI data during both in- and expiration within a single scan with optimal scan efficiency. The sequence was applied to measure the dependency of time resolved blood flow on in- and expiration during breath-hold and free breathing as well as valsalva maneuver in the major vessels. In-vivo measurements could detect respiration related difference in blood flow even during free breathing