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A Polyvinyl Alcohol-Based Thermochromic Material for Ultrasound Therapy Phantoms.

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Date
2020-11
ICR Author
Ter Haar, Gail
Author
Ambrogio, S
Baêsso, RDM
Gomis, A
Rivens, I
Haar, GT
Zeqiri, B
Ramnarine, KV
Fedele, F
Miloro, P
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Type
Journal Article
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Abstract
Temperature estimation is a fundamental step in assessment of the efficacy of thermal therapy. A thermochromic material sensitive within the temperature range 52.5°C-75°C has been developed. The material is based on polyvinyl alcohol cryogel with the addition of a commercial thermochromic ink. It is simple to manufacture, low cost, non-toxic and versatile. The thermal response of the material was evaluated using multiple methods, including immersion in a temperature-controlled water bath, a temperature-controlled heated needle and high-intensity focused ultrasound (HIFU) sonication. Changes in colour were evaluated using both RGB (red, green, blue) maps and pixel intensities. Acoustic and thermal properties of the material were measured. Thermo-acoustic simulations were run with an open-source software, and results were compared with the HIFU experiments, showing good agreement. The material has good potential for the development of ultrasound therapy phantoms.
URI
https://repository.icr.ac.uk/handle/internal/4193
DOI
https://doi.org/10.1016/j.ultrasmedbio.2020.07.032
Collections
  • Radiotherapy and Imaging
Research team
Therapeutic Ultrasound
Language
eng
Date accepted
2020-07-31
License start date
2020-11
Citation
Ultrasound in medicine & biology, 2020, 46 (11), pp. 3135 - 3144

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