Stochastic ray tracing for simulation of high intensity focal ultrasound therapy.
Stochastic ray tracing for simulation of high intensity focal ultrasound therapy.
复制标题
用于模拟高强度聚焦超声治疗的随机射线追踪。
DOI：
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发表时间：
2014
影响因子：
2.4
通讯作者：
M. Ries
中科院分区：
文献类型：
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作者：
J. Koskela;E. Vahala;M. de Greef;L. Lafitte;M. Ries
提出了一种快速模拟高强度聚焦超声（HIFU）声场的算法。本质上，该方法结合了射线追踪和蒙特卡罗积分来计算瑞利-索末菲积分。大量的计算粒子，声子，分布在相控阵换能器的元件之间。声子被发射到随机的方向，并沿沿着用射线追踪方法计算的轨迹传播。随着模拟的进行，获得了声场的改进的随机估计。该方法能适应复杂几何图形，适合并行化。根据参考模拟和来自离体猪胸部组织样本的压力测量结果验证该方法。结果与图形处理单元（GPU）的加速。该方法预计将服务于应用程序，其中的灵活性和快速计算时间是至关重要的，特别是临床HIFU治疗计划。
An algorithm is presented for rapid simulation of high-intensity focused ultrasound (HIFU) fields. Essentially, the method combines ray tracing with Monte Carlo integration to evaluate the Rayleigh-Sommerfeld integral. A large number of computational particles, phonons, are distributed among the elements of a phase-array transducer. The phonons are emitted into random directions and are propagated along trajectories computed with the ray tracing method. As the simulation progresses, an improving stochastic estimate of the acoustic field is obtained. The method can adapt to complicated geometries, and it is well suited to parallelization. The method is verified against reference simulations and pressure measurements from an ex vivo porcine thoracic tissue sample. Results are presented for acceleration with graphics processing units (GPUs). The method is expected to serve in applications, where flexibility and rapid computation time are crucial, in particular clinical HIFU treatment planning.
影响因子：
3.5
作者：
Clement, GT;Hynynen, K
通讯作者：
Hynynen, K