Acoustic vortices and phase gradient techniques for ultrasound elastography

Abstract

During the last decades ultrasound elastography has been developed as a reliable technique for medical diagnosis. Commonly, tissues are deformed under the action of the acoustic radiation force by using a pushing acoustic beam. However, using focused beams the acoustic radiation force can only push the tissue in the direction of the propagation of the beam and the degree of freedom to displace the tissue in other directions is limited. In addition, using spectral methods the computational costs associated with calculating the wavenumber of the propagating waves using spatiotemporal Fourier transforms can be remarkably high. We present an efficient method for ultrasound elastography based on acoustic vortices to transfer to tissues, in addition to linear, angular momentum. By twisting the tissue in alternating angles, efficient shear wave generation is achieved. Then, to generate the image, we propose a real-time method for shear wave velocity mapping combining spatial filtering and phase gradient techniques.During the last decades ultrasound elastography has been developed as a reliable technique for medical diagnosis. Commonly, tissues are deformed under the action of the acoustic radiation force by using a pushing acoustic beam. However, using focused beams the acoustic radiation force can only push the tissue in the direction of the propagation of the beam and the degree of freedom to displace the tissue in other directions is limited. In addition, using spectral methods the computational costs associated with calculating the wavenumber of the propagating waves using spatiotemporal Fourier transforms can be remarkably high. Aims:We present an efficient method for ultrasound elastography based on acoustic vortices to transfer to tissues, in addition to linear, angular momentum. By twisting the tissue in alternating angles, efficient shear wave generation is achieved. Then, to generate the image, we propose a real-time method for shear wave velocity mapping combining spatial filtering and phase gradient techniques.

@inproceedings{JimenezITEC2024,
 author = {Enrique González-Mateo and Francisco Camarena and Noé Jiménez},
 booktitle = {ITEC 2024: 18th International Tissue Elasticity Conference. Lyon, France. 21-23 October},
 doi = {https://elasticityconference.com/program.htm},
 editor = {Conference proceedings},
 month = {10},
 organization = {INSERM, LabTAU. Institute of Cancer Research},
 pages = {18-18},
 series = {Oral},
 title = {Acoustic vortices and phase gradient techniques for ultrasound elastography},
 url = {https://elasticityconference.com/program.htm},
 year = {2024}
}