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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Ultrasound surgery: comparison of strategies using phased arraysystems
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Ultrasound surgery: comparison of strategies using phased arraysystems

机译：超声外科：使用相控阵系统的策略比较

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In this paper the possibility of using phased array generatednmultiple-focus patterns to reduce the overall treatment time innultrasound surgery while restraining prefocal heating was investigated.nThis was done by comparing through computer simulation the performancenof different possible schemes, i.e., single-focus scans, multiple-focusnscans, and simultaneous multiple focusing without scanning, when used ton“ablate” a 10×10×10 mm3 tissue volumen100 mm deep. In all cases, 41 foci were used to cover the treatmentnvolume. Multiple-focus scans were arranged into nine groups which werenscanned in a raster fashion, as with single-focus scans. Keeping thentreatment time constant, the maximum intensities, maximum thermal doses,ndose distributions, and prefocal necrosis zones for the differentnschemes were compared. It was found that the nonscanned simultaneousnmultiple-focus case required the smallest maximum intensity and dose,nand resulted in the most even dose distribution. Single-focus rasternscanning of individual lesions, as currently used with fixed-focusntransducers, gave the worst results. These results show thatnmultiple-focus patterns help considerably in reducing the maximumnintensity and dose, and in generating a more even dose distributionnassuming the same treatment time and prefocal heating. Alternatively,nmultiple-focus patterns can be used to significantly reduce treatmentntime while keeping the maximum intensity and prefocal heating belownpredetermined limits
机译：本文研究了使用相控阵产生的多焦点模式来减少超声外科手术同时抑制焦前加热的总治疗时间的可能性。n这是通过计算机模拟比较了不同可能方案的性能来完成的，即单焦点扫描，多次-聚焦n扫描，并同时进行多次聚焦而不扫描，使用时“消融” 10×10×10 mm3厚100 mm的组织。在所有情况下，均使用41个病灶覆盖治疗量。与单焦点扫描一样，将多焦点扫描分为九组，然后以光栅方式对其进行扫描。在保持治疗时间不变的情况下，比较了不同化学疗法的最大强度，最大热剂量，剂量分布和病灶前坏死区。结果表明，非扫描同时多焦点病例需要最小的最大强度和剂量，并且剂量分布最均匀。目前，与固定聚焦换能器一起使用的单个病灶的单聚焦光栅扫描给出了最差的结果。这些结果表明，多重聚焦模式在减少相同强度的治疗时间和聚焦前加热的情况下，极大地有助于降低最大强度和剂量，并产生更均匀的剂量分布。或者，可以使用n个多焦点模式来显着减少治疗时间，同时将最大强度和预聚焦加热保持在预定极限以下

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