Open AccessThermal ablation of biological tissue by high intensity ultrasound
Author(s) -
Т. А. Андреева,
A. B. Belyankin,
А. Е. Беркович,
N. Y. Bykov,
С. В. Козырев,
A. Ya. Lukin
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1565/1/012060
Subject(s) - transducer , intensity (physics) , high intensity focused ultrasound , biological tissue , thermal ablation , materials science , ultrasonic sensor , ablation , thermal , ultrasound , acoustics , mechanics , volume (thermodynamics) , optics , biomedical engineering , physics , thermodynamics , engineering , aerospace engineering
The paper discusses the effect of a series of focused high-intensity ultrasound pulses from a multi-element transducer on the biological tissue. The simulation of the ultrasound intensity field in a homogeneous medium uses the Rayleigh integral. The thermal problem modelling is based on the numerical solution of the heat equation. The advantages of processing a given volume of tissue with pulses, whose focal points over time consistently diverge from the geometric focus of the transducer, have been demonstrated. The effect of the time delay between pulses on the nature of tissue heating and the size of the thermal ablation region is analyzed. The issues of scaling for the problem of heat distribution are discussed.