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Abstract #3333

MR-compatible Echocardiography and Predictive Slice Tracking Towards Ultrasound-driven Cardiovascular MRI

Lindsey Alexandra Crowe1, Francesco Santini2, Laura Gui1, Pauline Guillemin1, Orane Lorton1, Pamina Bernou1, Myriam Roth1, Gibran Manasseh1, Oliver Bieri2, Jean-Paul Vallée1, and Rares Salomir1

1Division of Radiology, Geneva University Hospitals, Geneva, Switzerland, 2Radiology, Universitätsspital Basel, Basel, Switzerland

MR imaging of cardiac valves is challenging as out-of-plane motion limits the use of 2D cine acquisitions. Ultrasound is well accepted as the clinical tool for observing valve motion. Here we suggest a hybrid imaging technology using in-bore ultrasound for direct observation of the motion of interest and subsequent on-the-fly adaptation of the MR slice position. MR-compatibility and workflow of echocardiography in-situ was demonstrated on a volunteer. Dynamic correction of motion in MR images was quantified with a moving phantom. Future-predicting algorithms yielded a reduction of apparent motion amplitude by a factor of twenty and dramatically improved “cine” image sharpness versus uncorrected data.

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