Abstract #0717

MR Acoustic Radiation Force Imaging: In Vivo Comparison to Ultrasound Motion Tracking

Yuexi Huang¹, Laura Curiel², Aleksandra Kukic¹, Rajiv Chopra¹, Kullervo Hynynen^1,3

¹Sunnybrook Health Sciences Centre, Toronto, ON, Canada; ²Thunder Bay Regional Research Institute, Thunder Bay, ON, Canada; ³Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada

MR acoustic radiation force imaging (MR-ARFI) was applied in vivo on rabbit thigh muscle simultaneously with real-time ultrasound motion tracking, by which time-resolved displacement values during the MR measurement were measured. Square-modulated focused ultrasound pulses at 50 Hz were applied at 25W acoustical power with 1% duty cycle during the measurements. Time-averaged results from the two modalities were compared. Results showed general agreement between MR-ARFI and the calculated ultrasound data.