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Mitigating pre-focal heating using a spherical Fibonacci lattice HIFU array and a near-field focusing strategy
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Xiongfei QU1, Nan WU2, Yazhu CHEN1, Guofeng SHEN1. Mitigating pre-focal heating using a spherical Fibonacci lattice HIFU array and a near-field focusing strategy[J]. Journal of Zhejiang University Science A, 1998, -1(-1): .
@article{title="Mitigating pre-focal heating using a spherical Fibonacci lattice HIFU array and a near-field focusing strategy",
author="Xiongfei QU1, Nan WU2, Yazhu CHEN1, Guofeng SHEN1",
journal="Journal of Zhejiang University Science A",
volume="-1",
number="-1",
pages="",
year="1998",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2400192"
}
%0 Journal Article
%T Mitigating pre-focal heating using a spherical Fibonacci lattice HIFU array and a near-field focusing strategy
%A Xiongfei QU1
%A Nan WU2
%A Yazhu CHEN1
%A Guofeng SHEN1
%J Journal of Zhejiang University SCIENCE A
%V -1
%N -1
%P
%@ 1673-565X
%D 1998
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2400192
TY - JOUR
T1 - Mitigating pre-focal heating using a spherical Fibonacci lattice HIFU array and a near-field focusing strategy
A1 - Xiongfei QU1
A1 - Nan WU2
A1 - Yazhu CHEN1
A1 - Guofeng SHEN1
J0 - Journal of Zhejiang University Science A
VL - -1
IS - -1
SP -
EP -
%@ 1673-565X
Y1 - 1998
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A2400192
Abstract: focus steering technique plays a crucial role in various high-intensity focused ultrasound (HIFU) treatment scenarios. However, due to current technological limitations, the focus quality degrades rapidly and prefocal grating lobes arise with increasing focus-shifting distance, which may adversely affect the safety of the treatment. To enlarge the focal steering range of a phased array, a novel method for array element arrangement is proposed in this study, which can increase both the safety and efficient steering range of the focus. Additionally, a ″near-field focusing″ strategy for ablation using an HIFU phased array is introduced. Experimental results demonstrate that this strategy not only effectively reduces the average acoustic intensity at the medium's surface but also inhibits temperature elevation in the prefocal region.Thus, this approach could mitigate the risks of skin burn and abdominal edema during clinical HIFU therapy.
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