TY - JOUR ID - 19637 TI - Simulation Study on the Effect of High-Intensity Focused Ultrasound on Thermal Lesion of Biological Tissue under Different Treatment Modes JO - Iranian Journal of Medical Physics JA - IJMP LA - en SN - AU - DONG, HU AU - LIU, GANG AU - MA, ZHENZHONG AU - PENG, GAOFENG AU - PAN, PING AD - School of Information Science and Engineering, Changsha Normal University, Changsha 410100, China AD - School of Information Science and Engineering, Changsha Normal University, Changsha 410100, China School of Physics and Electronics, Central South University AD - School of Information Science and Engineering, Changsha Normal University Y1 - 2022 PY - 2022 VL - 19 IS - 4 SP - 199 EP - 206 KW - High KW - intensity Focused Ultrasound Treatment Interval Lesion Area Intermittent Treatment DO - 10.22038/ijmp.2022.59497.1999 N2 - Introduction: High-intensity Focused Ultrasound (HIFU) treatment is a non-invasive technology. The purpose of this study was to explore the effects of different treatment depths, tissue types and treatment interval on biological tissue thermal lesions under continuous and intermittent treatment modes.Material and Methods: A simulation model of biological tissue irradiated by HIFU was established by finite difference time domain (FDTD). The thermal lesion of biological tissue irradiated by HIFU was calculated using the spherical beam equation (SBE) and Pennes biological heat transfer equation (PBHTE). Parameters such as treatment depth, tissue type, and treatment interval were varied to explore their effects on the thermal lesion to biological tissues in both continuous and intermittent treatment modes.Results: For the same biological tissue or treatment depth, with the increase of HIFU irradiation time, the focal temperature under continuous treatment was higher than that under intermittent treatment, and the thermal lesion area under continuous treatment was greater than that under intermittent treatment. Whether continuous or intermittent treatment, with the increase of treatment depth, the temperature rise rate of deep tissue was slower than that of superficial tissue, and the thermal lesion area decreased gradually. Moreover, in the intermittent treatment mode with a long single treatment time and short treatment interval, the focal temperature rase quickly and the thermal lesion area was large.Conclusion: For the same tissue type, treatment depth, or any treatment interval, the focal temperature and thermal lesion area corresponding to continuous treatment were greater than those corresponding to intermittent treatment. UR - https://ijmp.mums.ac.ir/article_19637.html L1 - https://ijmp.mums.ac.ir/article_19637_998b806d0d8cd5f0e5d080a1ed603fea.pdf ER -