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<section data-role="paragraph" data-color="rgb(182, 228, 253)" data-custom="rgb(182, 228, 253)"><section><section><section><section powered-by="gulangu"><section><section><section><section powered-by="gulangu"><section><section><section><section powered-by="gulangu"><section><section><section><section powered-by="gulangu"><section><section><section><section><p><p><img src="image/20201014/86b79d371e9862b01189f0252a03b2cd_1.png" /></p></p></section><section><section><span><strong></strong></span></section><p><span>医疗器械媒体报道先锋</span></p><p><span>分享专业医疗器械知识</span></p></section><section><section><section><span>关注</span></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section><section powered-by="gulangu"></section><p><br /></p><p><p><img src="image/20201014/0aa8c65e3e5d1bdb38aaca41a3adb303_2.jpg" /></p><br /></p><p><br /></p><p><trans oldtip="Clinical non-invasive ultrasounds require their transducers to make contact with the skin, as that allows high frequency vibrations to travel through the body. Many patients, including children, people with burns, and those with sensitive skin would rather be scanned using a contact-free system. Researchers at MIT have now shown that it is indeed possible to use lasers to perform ultrasound scans at a distance." newtip="临床无创超声要求他们的传感器与皮肤接触，因为这允许高频振动通过身体。许多患者，包括儿童、烧伤患者和敏感皮肤患者，宁愿使用无接触系统进行扫描。麻省理工学院的研究人员现在已经证明，确实有可能使用激光在远处进行超声波扫描。"></trans><trans oldtip="Clinical non-invasive ultrasounds require their transducers to make contact with the skin, as that allows high frequency vibrations to travel through the body. Many patients, including children, people with burns, and those with sensitive skin would rather be scanned using a contact-free system. Researchers at MIT have now shown that it is indeed possible to use lasers to perform ultrasound scans at a distance." newtip="临床无创超声要求他们的传感器与皮肤接触，因为这允许高频振动通过身体。许多患者，包括儿童、烧伤患者和敏感皮肤患者，宁愿使用无接触系统进行扫描。麻省理工学院的研究人员现在已经证明，确实有可能使用激光在远处进行超声波扫描。"><span>临床应用的无创超声，要求探头与人体皮肤直接接触来向身体传导高频振动的超声波。但是，有一些特定的患者却在超声检查时受到限制，比如儿童、烧伤患者和敏感皮肤患者等。而近日麻省理工学院的研究人员证明，确实有可能使用激光在不接触皮肤的前提下对患者进行超声波扫描。</span></trans></p><p><br /></p><p><p><img src="image/20201014/b25f708874efae35b23becf37cd8fa1d_3.jpg" /></p></p><p><br /></p><p><trans oldtip="Optoacoustic imaging involves using a laser to induce sound waves within tissues and to pick up the ultrasonic reflections with a detector that still has to make physical contact. Moreover, such scanning only works at very shallow depths, effectively only imaging a few millimeters below the skin." newtip="光声成像涉及到使用激光在组织中诱发声波，并用仍然需要进行物理接触的探测器接收超声波反射。此外，这种扫描只在非常浅的深度，有效地只成像几毫米以下的皮肤。"><span>一般的光声成像涉及使用激光在组织内感应声波，并通过仍然需要进行物理接触的检测器拾取超声反射。而且，这样的扫描仅在非常浅的深度起作用，仅在皮肤以下几毫米处有效成像。</span></trans></p><p><trans oldtip="Optoacoustic imaging involves using a laser to induce sound waves within tissues and to pick up the ultrasonic reflections with a detector that still has to make physical contact. Moreover, such scanning only works at very shallow depths, effectively only imaging a few millimeters below the skin." newtip="光声成像涉及到使用激光在组织中诱发声波，并用仍然需要进行物理接触的探测器接收超声波反射。此外，这种扫描只在非常浅的深度，有效地只成像几毫米以下的皮肤。"><span><br /></span></trans></p><p><span>而麻省理工学院的研究小组现在开发了一种<strong>使用激光检测皮肤上超声波振动</strong>的方法，以便可以使用一种激光使皮肤产生共振，而另一种则可以检测到振动，从而达到“远程超声扫描”的作用。</span></p><p><br /></p><p><iframe src="https://v.qq.com/iframe/player.html?width=500&height=375&auto=0&vid=w0398y5owse&auto=0" width="100%" height="580" frameborder="0"></iframe></p><p><span>超声成像原理</span></p><p><br /></p><p><trans oldtip="This is a major development, and such technology may revolutionize the field of ultrasound. Since with conventional ultrasounds skin contact severely modulates the resulting signal, a contact-free approach may overcome that limitation entirely." newtip="这是一项重大的发展，这种技术可能会使超声波领域发生革命性的变化。由于传统的超声波皮肤接触会严重地调节产生的信号，无接触的方法可以完全克服这个限制。"><span>这一发现极具重量，该技术甚至有可能会让超声诊断领域发生革命性的变化。不只是特殊患者群体能够因此受益，由于传统的超声诊断，会因为皮肤接触而严重调制所得信号，因此无接触方法可以完全克服该限制，这使得该技术能够有更广的应用场景。</span></trans></p><p><trans oldtip="This is a major development, and such technology may revolutionize the field of ultrasound. Since with conventional ultrasounds skin contact severely modulates the resulting signal, a contact-free approach may overcome that limitation entirely." newtip="这是一项重大的发展，这种技术可能会使超声波领域发生革命性的变化。由于传统的超声波皮肤接触会严重地调节产生的信号，无接触的方法可以完全克服这个限制。"></trans><trans oldtip="This is a major development, and such technology may revolutionize the field of ultrasound. Since with conventional ultrasounds skin contact severely modulates the resulting signal, a contact-free approach may overcome that limitation entirely." newtip="这是一项重大的发展，这种技术可能会使超声波领域发生革命性的变化。由于传统的超声波皮肤接触会严重地调节产生的信号，无接触的方法可以完全克服这个限制。"><br /></trans></p><p><trans oldtip="The researchers have already tested their system with healthy volunteers, scanning their forearms from a half meter away and comparing those results with those of conventional ultrasound. They were able to observe as deep as 6 centimeters into tissues and could see muscles, fat, and bones, reporting that their results were comparable with standard ultrasound. " newtip="研究人员已经用健康的志愿者测试了他们的系统，从半米以外的地方扫描了他们的前臂，并将这些结果与常规超声的结果进行了比较。他们能够观察到6厘米深的组织，可以看到肌肉、脂肪和骨骼，并报告说他们的结果与标准超声相当。"><span>目前，研究人员已经与健康的志愿者测试了他们的系统：从半米远处扫描了他们的前臂，并将这些结果与传统超声的结果进行了比较。他们能够观察到深达6厘米的组织，并能看到肌肉，脂肪和骨头，并报告其结果可与标准超声相媲美。</span></trans><trans oldtip="The researchers have already tested their system with healthy volunteers, scanning their forearms from a half meter away and comparing those results with those of conventional ultrasound. They were able to observe as deep as 6 centimeters into tissues and could see muscles, fat, and bones, reporting that their results were comparable with standard ultrasound. " newtip="研究人员已经用健康的志愿者测试了他们的系统，从半米以外的地方扫描了他们的前臂，并将这些结果与常规超声的结果进行了比较。他们能够观察到6厘米深的组织，可以看到肌肉、脂肪和骨骼，并报告说他们的结果与标准超声相当。"></trans></p><p><trans oldtip="The researchers have already tested their system with healthy volunteers, scanning their forearms from a half meter away and comparing those results with those of conventional ultrasound. They were able to observe as deep as 6 centimeters into tissues and could see muscles, fat, and bones, reporting that their results were comparable with standard ultrasound. " newtip="研究人员已经用健康的志愿者测试了他们的系统，从半米以外的地方扫描了他们的前臂，并将这些结果与常规超声的结果进行了比较。他们能够观察到6厘米深的组织，可以看到肌肉、脂肪和骨骼，并报告说他们的结果与标准超声相当。"></trans><trans oldtip="The researchers have already tested their system with healthy volunteers, scanning their forearms from a half meter away and comparing those results with those of conventional ultrasound. They were able to observe as deep as 6 centimeters into tissues and could see muscles, fat, and bones, reporting that their results were comparable with standard ultrasound. " newtip="研究人员已经用健康的志愿者测试了他们的系统，从半米以外的地方扫描了他们的前臂，并将这些结果与常规超声的结果进行了比较。他们能够观察到6厘米深的组织，可以看到肌肉、脂肪和骨骼，并报告说他们的结果与标准超声相当。"><br /></trans></p><p><trans oldtip="“We’re at the beginning of what we could do with laser ultrasound,” said Brian W. Anthony, a principal research scientist in MIT’s Department of Mechanical Engineering and Institute for Medical Engineering and Science (IMES), and a senior author of the study appearing in journal " newtip="麻省理工学院机械工程系和医学工程与科学研究所(IMES)的首席研究科学家布赖恩·W·安东尼(Brian W.Anthony)说：“我们正处于激光超声研究的开端。”他也是这项研究的资深作者，发表在期刊上。"></trans></p><p><span>麻省理工学院机械工程系和医学工程与科学研究所（IMES）的首席研究科学家布莱恩·安东尼（Brian W. Anthony）说：“我们是激光超声技术的开端。”该研究发表在</span><span>《Light: Science & Applications》杂志上。</span><span> “想</span><span>象一下，我们已经达到了超声波现在可以做的所有事情的地步，但要保持一定距离。这为您提供了一种全新的方式来查看体内器官并确定深层组织的性质，而无需与患者接触。”</span></p><p><br /></p><p><p><img src="image/20201014/05c37c32946fc5de7ce7ff6a0cf31075_4.jpg" /></p></p><p><span>麻省理工学院</span><br /></p><p><br /></p><p><span>此外，根据麻省理工学院的公告，还有一些值得关注的细节：</span></p><p><br /></p><p><span>根据他们的研究，该团队选择了1,550纳米激光器，该波长被水高度吸收（并且对眼睛和皮肤安全，并具有较大的安全裕度）。</span><span>由于皮肤基本上是由水组成的，因此研究小组认为皮肤应该有效吸收这种光，并因此而变热并扩张。</span><span>当其振荡回到其正常状态时，皮肤本身应产生通过身体传播的声波。</span></p><p><br /></p><p><span>研究人员用一种激光装置测试了这个想法，该装置使用一个波长为1,550纳米的脉冲激光来产生声波，并使用第二个连续激光，调谐到相同的波长以远程检测反射的声波。</span><span>第二个激光器是灵敏的运动检测器，可测量声波从肌肉，脂肪和其他组织反射回来而引起的皮肤表面振动。</span><span>反射的声波产生的皮肤表面运动会导致激光频率发生变化，这种变化可以测量。</span><span>通过机械扫描人体上的激光，科学家可以获取不同位置的数据并生成该区域的图像。</span></p><p><trans oldtip="The researchers tested this idea with a laser setup, using one pulsed laser set at 1,550 nanometers to generate sound waves, and a second continuous laser, tuned to the same wavelength, to remotely detect reflected sound waves. This second laser is a sensitive motion detector that measures vibrations on the skin surface caused by the sound waves bouncing off muscle, fat, and other tissues. Skin surface motion, generated by the reflected sound waves, causes a change in the laser’s frequency, which can be measured. By mechanically scanning the lasers over the body, scientists can acquire data at different locations and generate an image of the region." newtip="研究人员用激光装置测试了这一想法，使用1，550纳米脉冲激光产生声波，第二次连续激光，调谐到相同波长，远程检测反射声波。第二台激光是一种灵敏的运动探测器，它测量由声波从肌肉、脂肪和其他组织反射而引起的皮肤表面的振动。由反射声波产生的皮肤表面运动会引起激光频率的变化，这是可以测量的。通过对身体上的激光进行机械扫描，科学家可以在不同的位置获取数据并生成该区域的图像。"></trans><trans oldtip="The researchers tested this idea with a laser setup, using one pulsed laser set at 1,550 nanometers to generate sound waves, and a second continuous laser, tuned to the same wavelength, to remotely detect reflected sound waves. This second laser is a sensitive motion detector that measures vibrations on the skin surface caused by the sound waves bouncing off muscle, fat, and other tissues. Skin surface motion, generated by the reflected sound waves, causes a change in the laser’s frequency, which can be measured. By mechanically scanning the lasers over the body, scientists can acquire data at different locations and generate an image of the region." newtip="研究人员用激光装置测试了这一想法，使用1，550纳米脉冲激光产生声波，第二次连续激光，调谐到相同波长，远程检测反射声波。第二台激光是一种灵敏的运动探测器，它测量由声波从肌肉、脂肪和其他组织反射而引起的皮肤表面的振动。由反射声波产生的皮肤表面运动会引起激光频率的变化，这是可以测量的。通过对身体上的激光进行机械扫描，科学家可以在不同的位置获取数据并生成该区域的图像。"></trans><br /></p><p><span>原文链接：</span><span>https://www.medgadget.com/2019/12/laser-ultrasound-system-images-peoples-insides-from-a-distance.html</span></p><p><br /></p><p><a data-miniprogram-appid="wxdc7efe409d688f37" data-miniprogram-path="pages/index/index" data-miniprogram-nickname="智械采购" href="" data-miniprogram-type="image" data-miniprogram-servicetype="" href=""><p><img src="image/20201014/8edb31f87313bf5aa17544207dad3968_5.gif" /></p></a></p><p><br /></p><section data-role="outer" label="Powered by gulangu"><section data-role="paragraph" data-color="#757576"><section data-role="paragraph"><section><section><section 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发表于 2020-10-14 13:08:21