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Non-contact monitoring of the depth temperature profile for medical laser scanning technologies

Medical treatments such as high-intensity focused ultrasound, hyperthermic laser lipolysis or radiofrequency are employed as a minimally invasive alternatives for targeted tissue therapies. The increased temperature of the tissue triggers various thermal effects and leads to an unavoidable damage. A...

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Autores principales: Kosir, Jure, Vella, Daniele, Jezersek, Matija
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7679450/
https://www.ncbi.nlm.nih.gov/pubmed/33219279
http://dx.doi.org/10.1038/s41598-020-77283-9
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author Kosir, Jure
Vella, Daniele
Jezersek, Matija
author_facet Kosir, Jure
Vella, Daniele
Jezersek, Matija
author_sort Kosir, Jure
collection PubMed
description Medical treatments such as high-intensity focused ultrasound, hyperthermic laser lipolysis or radiofrequency are employed as a minimally invasive alternatives for targeted tissue therapies. The increased temperature of the tissue triggers various thermal effects and leads to an unavoidable damage. As targeted tissues are generally located below the surface, various approaches are utilized to prevent skin layers from overheating and irreparable thermal damages. These procedures are often accompanied by cooling systems and protective layers accounting for a non-trivial detection of the subsurface temperature peak. Here, we show a temperature peak estimation method based on infrared thermography recording of the surface temperature evolution coupled with a thermal-diffusion-based model and a time-dependent data matching algorithm. The performance of the newly developed method was further showcased by employing hyperthermic laser lipolysis on an ex-vivo porcine fat tissue. Deviations of the estimated peak temperature remained below 1 °C, as validated by simultaneous measurement of depth temperature field within the tissue. Reconstruction of the depth profile shows a good reproducibility of the real temperature distribution with a small deviation of the peak temperature position. A thermal camera in combination with the time-dependent matching bears the scope for non-contact monitoring of the depth temperature profile as fast as 30 s. The latest demand for miniaturization of thermal cameras provides the possibility to embed the model in portable thermal scanners or medical laser technologies for improving safety and efficiency.
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spelling pubmed-76794502020-11-24 Non-contact monitoring of the depth temperature profile for medical laser scanning technologies Kosir, Jure Vella, Daniele Jezersek, Matija Sci Rep Article Medical treatments such as high-intensity focused ultrasound, hyperthermic laser lipolysis or radiofrequency are employed as a minimally invasive alternatives for targeted tissue therapies. The increased temperature of the tissue triggers various thermal effects and leads to an unavoidable damage. As targeted tissues are generally located below the surface, various approaches are utilized to prevent skin layers from overheating and irreparable thermal damages. These procedures are often accompanied by cooling systems and protective layers accounting for a non-trivial detection of the subsurface temperature peak. Here, we show a temperature peak estimation method based on infrared thermography recording of the surface temperature evolution coupled with a thermal-diffusion-based model and a time-dependent data matching algorithm. The performance of the newly developed method was further showcased by employing hyperthermic laser lipolysis on an ex-vivo porcine fat tissue. Deviations of the estimated peak temperature remained below 1 °C, as validated by simultaneous measurement of depth temperature field within the tissue. Reconstruction of the depth profile shows a good reproducibility of the real temperature distribution with a small deviation of the peak temperature position. A thermal camera in combination with the time-dependent matching bears the scope for non-contact monitoring of the depth temperature profile as fast as 30 s. The latest demand for miniaturization of thermal cameras provides the possibility to embed the model in portable thermal scanners or medical laser technologies for improving safety and efficiency. Nature Publishing Group UK 2020-11-20 /pmc/articles/PMC7679450/ /pubmed/33219279 http://dx.doi.org/10.1038/s41598-020-77283-9 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Kosir, Jure
Vella, Daniele
Jezersek, Matija
Non-contact monitoring of the depth temperature profile for medical laser scanning technologies
title Non-contact monitoring of the depth temperature profile for medical laser scanning technologies
title_full Non-contact monitoring of the depth temperature profile for medical laser scanning technologies
title_fullStr Non-contact monitoring of the depth temperature profile for medical laser scanning technologies
title_full_unstemmed Non-contact monitoring of the depth temperature profile for medical laser scanning technologies
title_short Non-contact monitoring of the depth temperature profile for medical laser scanning technologies
title_sort non-contact monitoring of the depth temperature profile for medical laser scanning technologies
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7679450/
https://www.ncbi.nlm.nih.gov/pubmed/33219279
http://dx.doi.org/10.1038/s41598-020-77283-9
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