Improved simultaneous measurement of temperature and displacement measured by magnetic resonance acoustic radiation force imaging

摘要

In Magnetic Resonance Acoustic Emission Force Imaging (MR-ARFI), the MR imaging device 10 has an inverse encoding of the displacement to generate the subject's MR-ARFI data including successive image frames with the inverse displacement encoding. Perform gradient echo imaging including continuous MR dynamics. The ultrasound device 12 applies sonication to the subject during gradient echo imaging. Electronic processor 22 performs MR-ARFI data processing applied to the image elements of the image frame of the MR-ARFI data. The displacement is calculated for the image element of the image frame to be proportional to the phase difference between the image element of the image frame and the image element of the next or previous image frame having inverse displacement encoding (30). ). The calculated displacement is corrected for a temperature change between the image frame and the next or previous image frame (32). Temperature changes are determined using MR-ARFI data.