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Abstract #1684

Continuous vibration single shot magnetic resonance elastography for fast wave image acquisition

Florian Dittmann 1 , Sebastian Hirsch 1 , Jing Guo 1 , Jrgen Braun 2 , and Ingolf Sack 1

1 Institute of Radiology, Charit - Universittsmedizin Berlin, Berlin, Germany, 2 Institute of Medical Informatics, Charit - Universittsmedizin Berlin, Berlin, Germany

We propose a single shot MRE sequence synchronized to continuous mechanical vibrations by adaptive measurement block shifting. As a result, measurement time is significantly reduced compared to former single shot MRE sequences without compromising SNR and data quality. The new sequence is demonstrated for high resolution elastography of the brain by applying 15 frequencies in the range from 25 to 60 Hz and multifrequency wave field inversion. For 7 slices, 8 wave dynamics and three field components data acquisition for 15 frequencies was accomplished within 9:40 min which is to our knowledge the fastest MRE sequence currently available.

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