Experimental validation of acoustic and thermal modeling in heterogeneous phantoms using the hybrid angular spectrum method

Purpose The aim was to quantitatively validate the hybrid angular spectrum (HAS) algorithm, a rapid wave propagation technique for heterogeneous media, with both pressure and temperature measurements. Methods Heterogeneous tissue-mimicking phantoms were used to evaluate the accuracy of the HAS acous...

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Autores principales:	Megan Hansen, Douglas Christensen, Allison Payne
Formato:	article
Lenguaje:	EN
Publicado:	Taylor & Francis Group 2021
Materias:	acoustic modeling high-intensity focused ultrasound tissue-mimicking phantoms acoustic properties Medical technology R855-855.5
Acceso en línea:	https://doaj.org/article/49f971c27bf74dd8a18d75ae4c19443f
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spelling	oai:doaj.org-article:49f971c27bf74dd8a18d75ae4c19443f2021-11-17T14:21:55ZExperimental validation of acoustic and thermal modeling in heterogeneous phantoms using the hybrid angular spectrum method0265-67361464-515710.1080/02656736.2021.2000046https://doaj.org/article/49f971c27bf74dd8a18d75ae4c19443f2021-01-01T00:00:00Zhttp://dx.doi.org/10.1080/02656736.2021.2000046https://doaj.org/toc/0265-6736https://doaj.org/toc/1464-5157Purpose The aim was to quantitatively validate the hybrid angular spectrum (HAS) algorithm, a rapid wave propagation technique for heterogeneous media, with both pressure and temperature measurements. Methods Heterogeneous tissue-mimicking phantoms were used to evaluate the accuracy of the HAS acoustic modeling algorithm in predicting pressure and thermal patterns. Acoustic properties of the phantom components were measured by a through-transmission technique while thermal properties were measured with a commercial probe. Numerical models of each heterogeneous phantom were segmented from 3D MR images. Cylindrical phantoms 30-mm thick were placed in the pre-focal field of a focused ultrasound beam and 2D pressure measurements obtained with a scanning hydrophone. Peak pressure, full width at half maximum, and normalized root mean squared difference (RMSDn) between the measured and simulated patterns were compared. MR-guided sonications were performed on 150-mm phantoms to obtain MR temperature measurements. Using HAS-predicted power density patterns, temperature simulations were performed. Experimental and simulated temperature patterns were directly compared using peak and mean temperature plots, RMSDn metrics, and accuracy of heating localization. Results The average difference between simulated and hydrophone-measured peak pressures was 9.0% with an RMSDn of 11.4%. Comparison of the experimental MRI-derived and simulated temperature patterns showed RMSDn values of 10.2% and 11.1% and distance differences between the centers of thermal mass of 2.0 and 2.2 mm. Conclusions These results show that the computationally rapid hybrid angular spectrum method can predict pressure and temperature patterns in heterogeneous models, including uncertainties in property values and other parameters, to within approximately 10%.Megan HansenDouglas ChristensenAllison PayneTaylor & Francis Grouparticleacoustic modelinghigh-intensity focused ultrasoundtissue-mimicking phantomsacoustic propertiesMedical technologyR855-855.5ENInternational Journal of Hyperthermia, Vol 38, Iss 1, Pp 1617-1626 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	acoustic modeling high-intensity focused ultrasound tissue-mimicking phantoms acoustic properties Medical technology R855-855.5
spellingShingle	acoustic modeling high-intensity focused ultrasound tissue-mimicking phantoms acoustic properties Medical technology R855-855.5 Megan Hansen Douglas Christensen Allison Payne Experimental validation of acoustic and thermal modeling in heterogeneous phantoms using the hybrid angular spectrum method
description	Purpose The aim was to quantitatively validate the hybrid angular spectrum (HAS) algorithm, a rapid wave propagation technique for heterogeneous media, with both pressure and temperature measurements. Methods Heterogeneous tissue-mimicking phantoms were used to evaluate the accuracy of the HAS acoustic modeling algorithm in predicting pressure and thermal patterns. Acoustic properties of the phantom components were measured by a through-transmission technique while thermal properties were measured with a commercial probe. Numerical models of each heterogeneous phantom were segmented from 3D MR images. Cylindrical phantoms 30-mm thick were placed in the pre-focal field of a focused ultrasound beam and 2D pressure measurements obtained with a scanning hydrophone. Peak pressure, full width at half maximum, and normalized root mean squared difference (RMSDn) between the measured and simulated patterns were compared. MR-guided sonications were performed on 150-mm phantoms to obtain MR temperature measurements. Using HAS-predicted power density patterns, temperature simulations were performed. Experimental and simulated temperature patterns were directly compared using peak and mean temperature plots, RMSDn metrics, and accuracy of heating localization. Results The average difference between simulated and hydrophone-measured peak pressures was 9.0% with an RMSDn of 11.4%. Comparison of the experimental MRI-derived and simulated temperature patterns showed RMSDn values of 10.2% and 11.1% and distance differences between the centers of thermal mass of 2.0 and 2.2 mm. Conclusions These results show that the computationally rapid hybrid angular spectrum method can predict pressure and temperature patterns in heterogeneous models, including uncertainties in property values and other parameters, to within approximately 10%.
format	article
author	Megan Hansen Douglas Christensen Allison Payne
author_facet	Megan Hansen Douglas Christensen Allison Payne
author_sort	Megan Hansen
title	Experimental validation of acoustic and thermal modeling in heterogeneous phantoms using the hybrid angular spectrum method
title_short	Experimental validation of acoustic and thermal modeling in heterogeneous phantoms using the hybrid angular spectrum method
title_full	Experimental validation of acoustic and thermal modeling in heterogeneous phantoms using the hybrid angular spectrum method
title_fullStr	Experimental validation of acoustic and thermal modeling in heterogeneous phantoms using the hybrid angular spectrum method
title_full_unstemmed	Experimental validation of acoustic and thermal modeling in heterogeneous phantoms using the hybrid angular spectrum method
title_sort	experimental validation of acoustic and thermal modeling in heterogeneous phantoms using the hybrid angular spectrum method
publisher	Taylor & Francis Group
publishDate	2021
url	https://doaj.org/article/49f971c27bf74dd8a18d75ae4c19443f
work_keys_str_mv	AT meganhansen experimentalvalidationofacousticandthermalmodelinginheterogeneousphantomsusingthehybridangularspectrummethod AT douglaschristensen experimentalvalidationofacousticandthermalmodelinginheterogeneousphantomsusingthehybridangularspectrummethod AT allisonpayne experimentalvalidationofacousticandthermalmodelinginheterogeneousphantomsusingthehybridangularspectrummethod
_version_	1718425478625230848

Experimental validation of acoustic and thermal modeling in heterogeneous phantoms using the hybrid angular spectrum method

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