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- W1617401812 abstract "Understanding of ultrasound‐tissue interaction is important for realization of clinically useful therapeutic ultrasound methods and devices. Linear acoustic propagation in homogeneous media, including diffraction and absorption effects, provides a useful first approximation but fails to accurately model many problems of interest. Depending on the therapy regime, other important effects can include finite‐amplitude propagation, cavitation and other gas activity, inhomogeneous tissue structure, temperature‐dependent tissue properties, and irreversible tissue modification. For bulk ablation of soft tissue using ultrasound, prediction of therapeutic effects requires accurate knowledge of space‐ and time‐dependent heat deposition from acoustic absorption. A primary factor affecting heat deposition is local heat loss due to blood flow, both from bulk perfusion and large vessels. Gas activity due to boiling and tissue property changes due to local ablation, both of which markedly affect treatment, can be approximated by appropriate modification of the initial heat deposition pattern. Acoustically inhomogeneous tissue structure, even in nominally homogeneous organs such as the liver, can modify heating patterns enough to change treatment outcomes. These issues are illustrated by simulations of ultrasound therapy and comparison with in vivo and in vitro ultrasound ablation experiments." @default.
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- W1617401812 date "2006-01-01" @default.
- W1617401812 modified "2023-09-25" @default.
- W1617401812 title "Acoustic field modeling in therapeutic ultrasound" @default.
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- W1617401812 doi "https://doi.org/10.1063/1.2210348" @default.
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