The Effect of High Intensity Focused Ultrasound Combined with Ethanol on the Lesion of Porcine Liver in Vitro

Document Type : Original Paper

Authors

1 School of Information Science and Engineering, Changsha Normal University, Changsha 410100, China

2 School of Physics and Electronics, Central South University, Changsha 410083, China

Abstract

Introduction: As a non-invasive method of tumor hyperthermia, high intensity focused ultrasound (HIFU) has been widely used in the treatment of various solid tumors in recent years. The purpose of this study was to investigate the effect of HIFU combined with ethanol on biological tissue lesions.
Material and Methods: Firstly, 0.5ml 95% ethanol was injected into the porcine liver tissue in vitro, then HIFU was used to irradiate the porcine liver. The B-mode ultrasound and needle hydrophone were used to monitor the cavitation. A thermocouple was also used to measure the real-time focal temperature. The ultrasonic signal scattered at the focal point of HIFU irradiation was collected by the fiber hydrophone, and the attenuation coefficient was calculated. Finally, the attenuation coefficient was input into the Khokhlov-Zabolotskaya-Kuznetov (KZK) equation and combined with the Pennes equation. The thermal lesion of the porcine liver was simulated by MATLAB software.
Results: The length of the long axis of the lesion area simulated by the attenuation coefficient of cavitation was closer to the length of the long axis of the actual measured lesion area with ethanol injection, but the length of the short axis of the simulated lesion area was smaller than that of the measured lesion area. However, the length of the long axis of the lesion area simulated by the attenuation coefficient of cavitation was larger than the length of the long axis of the lesion area simulated by the attenuation coefficient of liver at room temperature. The same results were obtained for the length of short axis.
Conclusion: HIFU combined with ethanol can produce larger lesions to biological tissues and improve the therapeutic effect.

Keywords

Main Subjects

References

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Iranian Journal of Medical Physics
Volume 19, Issue 2
March and April 2022
Pages 74-84

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History

  • Receive Date: 09 October 2020
  • Revise Date: 19 February 2021
  • Accept Date: 17 April 2021

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