本文選題：高強度聚焦超聲 + 時間反轉(zhuǎn)方法��； 參考：《應用聲學》2017年02期

【摘要】：為考察基于時間反轉(zhuǎn)方法的高強度聚焦超聲治療在預設目標點處的組織損傷情況,使用三維有限差分算法求解Westervelt方程,建立非線性聲波傳播數(shù)值模型,采用97陣元相控陣結合虛擬源的時間反轉(zhuǎn)方法進行超聲聚焦,分析其形成的聲場和熱場,并考察目標點偏離軸線時的組織損傷形成規(guī)律。結果表明隨著目標點偏軸距離的增大,聲壓旁瓣開始增多。旁瓣的溫升較低,不足以形成組織損傷。時間反轉(zhuǎn)方法可用于多點聚焦,在一定的范圍內(nèi),形成多點目標損傷而不產(chǎn)生額外的周圍組織損傷。同時多點聚焦可以形成一個較大的損傷區(qū)域,減少超聲治療時間。
[Abstract]:In order to investigate the tissue damage at preset target point in high intensity focused ultrasound (HIFU) therapy based on time reversal method, a numerical model of nonlinear acoustic wave propagation was established by solving Westervelt equation with three dimensional finite difference algorithm. The ultrasonic focusing is carried out by using 97 array element phased array combined with the time reversal method of virtual source. The sound field and thermal field are analyzed, and the formation rule of tissue damage when the target point deviates from the axis is investigated. The results show that the sound pressure sidelobes begin to increase with the increase of the distance between the target points and the axis. The temperature rise of the sidelobe is low enough to cause tissue damage. The time reversal method can be used for multi-point focusing. In a certain range, multi-point target damage can be formed without any additional surrounding tissue damage. At the same time, multi-point focusing can form a large area of injury and reduce the time of ultrasound therapy.
【作者單位】： 中國科學院聲學研究所聲場聲信息國家重點實驗室;中國科學院大學;
【基金】：國家自然科學基金項目(81527901,41274134)
【分類號】：R454.3

【參考文獻】

相關期刊論文 前4條

1 韓珍珍;丁鑫;羅明艷;菅喜岐;;基于時間反轉(zhuǎn)法的相控換能器聲場的仿真研究[J];應用聲學;2015年04期

2 耿昊;范庭波;張U，

本文編號：1796285