Abstract
Phase aberrations and attenuations caused by bone can defocus HIFU in the brain and organs behind the ribcage. To refocus the beam, MR-ARFI can be used to measure tissue displacements created by each element in the transducer, and optimize driving signal delays and amplitudes. We introduce a new MR-ARFI-based autofocusing method that requires many fewer image acquisitions than current methods. The method is validated in simulations of bone and brain HIFU transducers, and compared to a conventional method. © 2012 American Institute of Physics.
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Grissom, W. A., Kaye, E., Pauly, K. B., Zur, Y., Yeo, D., Medan, Y., & Davis, C. (2012). Rapid HIFU autofocusing using the entire MR-ARFI image. In AIP Conference Proceedings (Vol. 1503, pp. 162–167). https://doi.org/10.1063/1.4769936
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