In this project, single-element ultrasound transducers - called organ-configuration motion (OCM) sensors, conventional MR imaging and machine learning algorithms are combined to boost the temporal resolution of MRI from roughly one frame per second to one hundred. After the system has learned enough data, the scanner can even be turned-off, and as long as the OCM sensor is still attached to the subject, MR images can still be estimated by the algorithm. This works even outside of the scanner, paving the way for various image-guided therapy applications such as focused ultrasound, which rely on accurate information about organ motion at high frame rates.
Preiswerk, F., Toews, M., Cheng, C.-C., Chiou, J.G., Mei, C.-S., Schaefer, L.F., Hoge, W.S., Schwartz, B.M., Panych, L.P., and Madore, B. (2016). Hybrid MRI-Ultrasound Acquisitions, and Scannerless Real-Time Imaging. Magnetic Resonance in Medicine.
Wu, P.-H., Preiswerk, F., Cheng, C.-C., and Madore, B. (2017). Hybrid MR-ultrasound acquisition for multi-baseline thermometry. In ISMRM 25th Annual Meeting, (Honolulu).
Preiswerk, F., Cheng, C.-C., Wu, P.-H., Panych, L.P., and Madore, B. (2017). Ultrasound-based Cardiac Gating for MRI. In ISMRM 25th Annual Meeting, (Honolulu).
Preiswerk, F., Cai, J., Cheng, C.-C., Hoge, W.S., Wu, P.-H., Panych, L.P., and Madore, B. (2017). RF-sensing for Trigger-based Synchronization of Auxiliary Devices, and Pulse-sequence Debugging. In ISMRM 25th Annual Meeting, (Honolulu).
Hoge, W.S., Preiswerk, F., Polimeni, J.R., Yengul, S.S., Aksit Ciris, P., and Madore, B. (2017). Ultrasound Monitoring of a Respiratory Phantom for the Development and Validation of Segmented EPI Reconstruction Methods. In ISMRM 25th Annual Meeting, (Honolulu).
Preiswerk, F., Cheng, C.-C., Yengul, S.S., Panych, L.P., and Madore, B. (2016). Scannerless real-time MRI. In ISMRM 24th Annual Meeting, (Singapore), p. 3578.
Preiswerk F, Toews M, Hoge WS, Chiou J-yuan G, Panych LP, Wells WM, Madore B. Hybrid Utrasound and MRI Acquisitions for High-Speed Imaging of Respiratory Organ Motion, in Medical Image Computing and Computer-Assisted Intervention – MICCAI 2015. Vol 9349. Cham: Springer International Publishing ; 2015 :315–322. Publisher's Version Download PDF
Preiswerk F, Hoge WS, Toews M, Chiou J-yuan G, Chauvin L, Panych LP, Madore B. Speeding-up MR acquisitions using ultrasound signals, and scanner-less real-time MR imaging, in ISMRM 23rd Annual Meeting. Toronto, Canada ; 2015 :0863. Download PDF