Tissue Characterization by Low-Frequency Acoustic Waves Generated by a Single High-Frequency Focused Ultrasound Beam
The mechanical properties of biological tissues are fingerprints of certain pathologic processes. Ultrasound systems have been used as a non-invasive technique to both induce kilohertz-frequency mechanical vibrations and detect waves resulting from interactions with biological structures. However, existing methodologies to produce kilohertz-frequency mechanical vibrations using ultrasound require the use of variable-frequency, dual-frequency and high-power systems. Here, we propose and demonstrate the use of bursts of megahertz- frequency acoustic radiation to observe kilohertz-frequency mechanical responses in biological tissues.
Source: Ultrasound in Medicine and Biology - Category: Radiology Authors: Guilherme A. Braz, Andre L. Baggio, Paulo M. Agnollitto, Felipe W. Grillo, Theo Z. Pavan, Francisco J.A. Paula, Marcello H. Nogueira-Barbosa, George C. Cardoso, Antonio A.O. Carneiro Tags: Original Contribution Source Type: research