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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><p><br /></p><p><span>接受磁共振检查时，患者很多时候不得不把身体部位塞进硬邦邦的射频(radio-frequency,RF)线圈里，这些线圈并非量身定做，往往让人感到很不舒适，而且许多磁共振检查可能需要半个小时乃至更长的时间才能完成，因此，接受磁共振检查对很多人来说可能是一个不太愉快的过程。</span><br /></p><p><br /></p><p><span>近日，美国普渡大学(Purdue University)的研究人员利用国防和航空航天技术，开发出了一种<strong>能够弯曲和拉伸的射频线圈</strong><strong>，未来可以制成可穿戴服装，供磁共振检查时使用</strong>。该项研究成果日前发表在了《IEEE生物医学工程会刊》(IEEE Transactions on Biomedical Engineering)上。</span></p><p><br /></p><p><span><p><img src="image/20201014/993f2b6f12ea5c2500363ba3ae5f177e_2.jpg" /></p></span></p><p><span><strong>(图片来源：</strong><strong>普渡大学官网)</strong></span></p><p><br /></p><p><span>这种新型线圈将<strong>导电镀银线(conductive silver-coated threads)</strong>缝合(stitched)在布料上。<strong>这些线以交替的方式形成“之”字形</strong>，有助于优化信噪比。其所使用的线程技术(thread technology)与航空航天和国防工业中的应用类似。</span></p><p><br /></p><p><span>目前，提高信噪比的方法是用接收线圈包裹住身体部分需要检查的部位，但线圈是刚性的，需要患者摆出特定的姿势。与通用型刚性线圈相比，<strong>这种新式线圈柔软且能弯曲，可以贴合着皮肤放置在身体的某个部位或关节处</strong>，有利于提高成像质量，而且还<strong>适用于乳房这种外形和密度差异性都很大的部位</strong>。</span></p><p><br /></p><p><span>据研究人员表示，初步研究结果显示，全尺寸设备在诊断测试的各个方面都将具有优势，包括<strong>灵敏度的提高和假阳性的减少</strong>。</span></p><p><br /></p><p><span>根据论文摘要，该线圈应用于3T磁共振取得了如下<strong>研究</strong><strong>成果</strong>：</span></p><section data-role="list"><ul><li><p><span>使用这种新式线圈(stitched coil)对人体手腕进行了成像，信噪比计算表明，与柔性标准PCB线圈(flexible, standard PCB coil)相比，<strong>新式线圈的信噪比会根据拉伸程度和方向降低13%-30%</strong>。</span></p></li></ul></section><section data-role="list"><ul><li><p><span>尽管这种材料组合的信噪比有所降低，但与现有的弹性线圈设计相比，<strong>信噪比下降的百分比也降低了</strong>。这些成像结果和计算都支持对更复杂的线圈几何形状进行更进一步的实验。</span></p></li></ul></section><section data-role="list"><ul><li><p><span>这种新式线圈的独特性在于能<strong>向所有方向拉伸，在不同的弯曲度下进行关节成像</strong><strong>，同时与皮肤紧密贴合</strong>。其所使用的材料像运动服一样舒适，并且可以应用于各种结构的线圈中。</span></p></li></ul></section><p><br /></p><p><span>美国国立卫生研究院(National Institutes of Health)为这项技术提供了部分资金。研究人员正在与普渡大学研究基金会技术商业化办公室(Purdue Research Foundation Office of Technology Commercialization)合作，为这项技术申请专利，<strong>同时寻找合作伙伴进行下一步的开发</strong>。</span></p><p><br 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发表于 2020-10-14 12:50:33