Benchmark problems for transcranial ultrasound simulation: Intercomparison of compressional wave models.
Benchmark problems for transcranial ultrasound simulation: Intercomparison of compressional wave models.
复制标题
DOI：
10.1121/10.0013426
复制
发表时间：
2022-08
期刊：
影响因子：
--
通讯作者：
中科院分区：
文献类型：
--
作者：
声波传播的计算模型经常用于经颅超声治疗，例如，计算颅内压场或计算相位延迟以校正颅骨变形。为了对社区使用的不同建模工具和技术进行相互比较，召集了一个国际工作组来制定一套数字基准。在这里，这些基准，沿着相互比较的结果。九个不同的基准增加几何复杂性的定义。这些包括浸入水中的单层平面骨，多层骨和整个头骨。两个换能器配置被认为是（一个集中的碗和一个平面活塞在500 kHz的操作），给出了总共18个排列的基准。使用11种不同的建模工具来计算基准测试结果。该模型跨越了广泛的数值技术，包括时域有限差分法，角谱法，伪谱法，边界元法，和谱元法。在模型之间发现了良好的一致性，特别是对于颅骨内的声焦点的位置、大小和幅度。当在交叉比较中将每个模型的结果与每个其他模型进行比较时，每个基准的焦点压力和位置差异的中值分别小于10%和1 mm。基准定义、模型结果和相互比较代码可免费获得，以便于进一步比较。
Computational models of acoustic wave propagation are frequently used in transcranial ultrasound therapy, for example, to calculate the intracranial pressure field or to calculate phase delays to correct for skull distortions. To allow intercomparison between the different modeling tools and techniques used by the community, an international working group was convened to formulate a set of numerical benchmarks. Here, these benchmarks are presented, along with intercomparison results. Nine different benchmarks of increasing geometric complexity are defined. These include a single-layer planar bone immersed in water, a multi-layer bone, and a whole skull. Two transducer configurations are considered (a focused bowl and a plane piston operating at 500 kHz), giving a total of 18 permutations of the benchmarks. Eleven different modeling tools are used to compute the benchmark results. The models span a wide range of numerical techniques, including the finite-difference time-domain method, angular spectrum method, pseudospectral method, boundary-element method, and spectral-element method. Good agreement is found between the models, particularly for the position, size, and magnitude of the acoustic focus within the skull. When comparing results for each model with every other model in a cross-comparison, the median values for each benchmark for the difference in focal pressure and position are less than 10% and 1 mm, respectively. The benchmark definitions, model results, and intercomparison codes are freely available to facilitate further comparisons.
登录
查看更多内容
影响因子：
2.9
作者：
Clement, GT;Hynynen, K
通讯作者：
Hynynen, K
影响因子：
2.4
作者：
FRY, FJ;BARGER, JE
通讯作者：
BARGER, JE
影响因子：
4.4
作者：
Bohlen, T
通讯作者：
Bohlen, T
影响因子：
2.4
作者：
Clement, GT;White, PJ;Hynynen, K
通讯作者：
Hynynen, K
影响因子：
2.4
作者：
Chen, Duo;McGough, Robert J.
通讯作者：
McGough, Robert J.