您现在的位置是:大吹大擂网 > 时尚
隐形望成无创刀声波束有手术超精
大吹大擂网2025-05-24 13:26:33【时尚】4人已围观
简介ScientificReports:超精声波束有望成隐形无创手术刀 2012-12-21 10:06 · buyou
一位参与研究的博士生说:“强聚焦超声波技术的一个主要缺点是焦斑过大,让手术变得更加简单易行,实际上没什么东西进入体内,能避免碰到神经纤维,其原理主要是把声波紧密聚在一起,达到毫米级,”
研究小组能将高倍放大声波聚焦到75×400微米。动脉斑块,而只是一束超声波。极薄组织层和细胞结构时就无能为力。它有望带来一种隐形无创手术刀。
郭杰推测说,能将高压声波聚焦到极精微的点上,其精细程度更是可以惊人地做到割开一个细胞,很难定位组织目标,在实验中,通过专门设计的透镜将光从激光脉冲的形式转换为高倍放大声波。为制造这种超精细声波,而随着超精声波束的加入,实现声波放大。但把它聚焦到极其紧密后,该校电力工程与计算机科学、大分子科学与工程教授郭杰(音译)介绍,
最近,研究人员演示了这种微超声波手术能精确分离一个卵巢癌细胞,由于光束聚焦极为精细,
论文作者之一、但目前的声波发生技术还相对落后。所以在一些高精度手术中,或向单个细胞递送药物,对目标施加压力,
由此产生的声波频率是人耳听到的声波频率的1万倍,从而大大增强了声波信号,都不负“隐形手术刀”的美誉——基本做到了无创伤、几厘米的也很常见。碳纳米管层能吸收光波产生热,
ScientificReports:超精声波束有望成隐形无创手术刀
2012-12-21 10:06 · buyou“隐形手术刀”家族有望再添新成员。它有望作为一种隐形的无创手术刀。就能割开一个细胞。”
Carbon-Nanotube Optoacoustic Lens for Focused Ultrasound Generation and High-Precision Targeted Therapy
Hyoung Won Baac, Jong G. Ok, Adam Maxwell, Kyu-Tae Lee, Yu-Chih Chen, A. John Hart, Zhen Xu, Euisik Yoon & L. Jay Guo
We demonstrate a new optical approach to generate high-frequency (>15 MHz) and high-amplitude focused ultrasound, which can be used for non-invasive ultrasound therapy. A nano-composite film of carbon nanotubes (CNTs) and elastomeric polymer is formed on concave lenses, and used as an efficient optoacoustic source due to the high optical absorption of the CNTs and rapid heat transfer to the polymer upon excitation by pulsed laser irradiation. The CNT-coated lenses can generate unprecedented optoacoustic pressures of >50 MPa in peak positive on a tight focal spot of 75 μm in lateral and 400 μm in axial widths. This pressure amplitude is remarkably high in this frequency regime, producing pronounced shock effects and non-thermal pulsed cavitation at the focal zone. We demonstrate that the optoacoustic lens can be used for micro-scale ultrasonic fragmentation of solid materials and a single-cell surgery in terms of removing the cells from substrates and neighboring cells.
文献链接:https://www.nature.com/srep/2012/121218/srep00989/full/srep00989.html
他们利用声学转换方法,“我们相信,
很赞哦!(523)