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<p><p><img src="image/20201014/95b80f60020cc3824a6b1afb671f3c5f_1.jpg" /></p><strong>It's time for a Revolution</strong></p><p><br /></p><p><p><img src="image/20201014/326dd0b1029149abcba25296cd980b6e_2.jpg" /></p></p><p><span>- - - - - - - - - - - - - - - - - - - - - - - - - -</span></p><p><br /></p><p><span><strong>参观时间：5.15-5.18 9:00-17:00</strong></span></p><p><strong><span>通用电气医疗系统贸易发展（上海）有限公司</span></strong></p><p><strong><span>展位号：H7.2-E02</span></strong></p><p><span>- - - - - - - - - - - - - - - - - - - - - - - - - -</span></p><p><strong>产品介绍：</strong></p><p>宽的极致 - 16厘米高清宝石探测器</p><p>快的极致 - 29ms时间分辨率</p><p>高清的极致 - 0.23mm空间分辨率</p><p>能量的极致 - 多物质能谱分析</p><p>低剂量的极致 - -82%低剂量、-50%低对比剂用量</p><p>舒适性的极致 - 2000px超大孔径 70分贝超低静音</p><p><span>http://v.qq.com/page/b/4/q/b01537s434q.html </span></p><p><iframe src="http://v.qq.com/iframe/player.html?vid=b01537s434q&auto=0" width="100%" height="580" frameborder="0"></iframe><br /></p><p><p><img src="image/20201014/60674865a3e2190ca95abba28606414c_3.jpg" /></p></p><p><br /></p><p><span><span>CT</span><span>的快是为了冻结始终跳动着的心脏。</span><span>Revolution CT</span><span>做到了快的极致，在任意心率和心律条件下，都可以在一个心动周期内完成心脏成像，尤其可以实现</span><span>1-beat 1-stop </span><span>心脏解剖和功能成像</span><sup><span>[1]</span></sup><span>。</span></span></p><p><span><br /></span></p><p><span><span>Revolution
CT</span><span>之所以可以做到快的极致，是因为</span><span>Revolution CT</span><span>具备高的三维时间分辨率。那么什么是三维时间分辨率呢？</span></span></p><p><span><br /></span></p><p><span><span>传统意义上的时间分辨率是二维时间分辨率（又名</span><span>X/Y</span><span>轴时间分辨率）。但是，心脏的运动是三维的，不仅</span><span>X/Y</span><span>轴有运动，</span><span>Z</span><span>轴也有运动</span><sup>[2]</sup><span>。因此要真正冻结心脏，要求</span><span>CT </span><span>在</span><span>X/Y/Z</span><span>三个维度上的时间分辨率都很高。</span></span></p><p><span><br /></span></p><p><span><span>Revolution CT
</span><span>的三维时间分辨率的参数是：</span><span>X/Y </span><span>轴时间分辨率是</span><span>29ms</span><span>，</span><span>Z</span><span>轴时间分辨率是</span><span>0ms</span><span>（达到所有层面的同时、同相位）。</span></span></p><p><span><br /></span></p><p><span><span>Revolution CT
</span><span>的三大硬件保证了如此高的三维时间分辨率<sup>［</sup></span><sup>1</sup><sup><span>］</span></sup><span>：</span></span></p><ul><li><p><span><span>16</span><span>厘米宽的宝石探测器，实现</span><span>0ms Z</span><span>轴时间分辨率</span></span></p></li><li><p><span>0.28s<span>的转速和</span>SSF<span>技术，实现</span>29ms X/Y<span>轴时间分辨率</span></span></p></li><li><p><span><span>智能心电门控</span>Auto-gating<span>，保证在任意心率（律）的</span>1-beat<span>采样。</span></span></p><p><span><span></span></span></p></li></ul><p><p><img src="image/20201014/4d6d94ea02dec3ed04af09800404b36a_4.jpg" /></p><br /></p><p><span><strong><span>一、实现</span><span>0ms</span><span>的</span><span>Z</span><span>轴时间分辨率，达到所有层面的同时、同相位</span></strong></span></p><p><span><span>要实现</span><span>0ms</span><span>的</span><span>Z</span><span>轴时间分辨率，要求</span><span>Revolution CT</span><span>的探测器在</span><span>Z</span><span>轴方向可以覆盖所有大小的心脏。</span><span>Revolution CT</span><span>具备的</span><span>16</span><span>厘米宽的宝石探测器<sup>［</sup></span><sup>3</sup><sup><span>］</span></sup><span>可以在</span><span>Z </span><span>轴方向覆盖几乎所有大小的心脏，因此</span><span>Revolution CT </span><span>的</span><span>Z</span><span>轴时间分辨率是</span><span>0ms</span><span>。</span></span></p><p><p><img src="image/20201014/896530e7d2b4aa8d6818af0aacd5741d_5.png" /></p><br /></p><p>http://v.qq.com/page/x/8/l/x01538ulh8l.html</p><p><iframe src="http://v.qq.com/iframe/player.html?vid=x01538ulh8l&auto=0" width="100%" height="580" frameborder="0"></iframe><br /></p><p><span><strong><span>二、实现</span><span>29ms </span><span>的</span><span>X/Y</span><span>轴时间分辨率</span></strong></span></p><p><span><strong><span><br /></span></strong></span></p><p><span><span>为了实现</span><span>29ms</span><span>的</span><span>X/Y</span><span>轴时间分辨率，</span><span>GE</span><span>的工程师团队专门研发了</span><span>Whisper Drive</span><span>（静音高速驱动系统）<sup>［</sup></span><sup>4</sup><sup><span>］</span></sup><span>，实现</span><span>0.28s/rot</span><span>高速旋转，并配备</span><span>SSF</span><span>技术，实现了</span><span>29ms</span><span>单扇区</span><span> X</span><span>／</span><span>Y</span><span>轴时间分辨率。</span></span><br /></p><p><span><span><br /></span></span></p><ul><li><p><span><strong><span>电磁直接驱动</span><span> Direct Drive</span></strong></span></p><p><strong><span></span></strong><span><span>Revolution CT</span><span>的驱动方法采用了电磁直接驱动（如图</span><span>1</span><span>），利用电流切割磁力线产生的驱动力推动整个机架以</span><span>0.28s/rot</span><span>的速度进行高速旋转。</span></span></p></li></ul><p><p><img src="image/20201014/55a17bd20795406418135b18ae29f938_6.png" /></p><br /></p><p><span><strong><span>一体化成型机架，可以承受大于</span><span>70G</span><span>的重力加速度</span></strong></span></p><p><strong><span></span></strong><span><span>机架转速的提高必然导致离心力的增加。</span><span>Revolution CT</span><span>在</span><span>0.28s/rot</span><span>的高速旋转时，所产生的机架离心力超过</span><span>70G</span><span>的重力加速度，这对于机架的安全性带来了巨大的挑战。按照传统思路，需要通过增加结构的宽度和厚度，来提高整个机架的强度；然而结构宽度和厚度的增加也会增加重力加速度，这又陷入了一个悖论。为了解决这个问题，</span><span>GE </span><span>的工程师从材料学和制造工艺上给出了完美的解答案。首先，</span><span>Revolution CT</span><span>应用了一种特殊的军用铝合金材料，这种材料强度高、重量轻。其次，机架的锻造使用了一体成型</span><span>(unibody)</span><span>技术，这大大减小了机架的体积。因此，</span><span>Revolution CT</span><span>可以承受</span><span>135G</span><span>的重力加速度，为未来实现更高旋转速度打下了坚实的基础架构（如图</span><span>2</span><span>）。</span></span></p><p><p><img src="image/20201014/e5bcbbf4169da0da248607a8a7ef211f_7.png" /></p><br /></p><p><span><strong><span>无碳刷、非接触式新型滑环设计</span></strong></span></p><p><strong><span></span></strong><span><span>传统的滑环通过碳刷</span><span>/</span><span>银刷和黄铜环的接触，将机架</span><span> “</span><span>定子</span><span>” </span><span>上的电力传输至</span><span> “</span><span>转子</span><span>”</span><span>，并驱动后者旋转，再将</span><span>“</span><span>转子</span><span>”</span><span>采集的数据传送回</span><span>“</span><span>定子</span><span>”</span><span>。该结构由于存在着碳刷</span><span>/</span><span>银刷和黄铜环的物理接触，会产生噪声，并在长期使用的情况下，产生磨损。</span><span>Revolution CT</span><span>采用了无碳刷、非接触式全新设计（如图</span><span>3</span><span>），通过无线供电技术给旋转部件供电，再通过无线电射频技术将高清数据从机架的旋转端传输到静态端。相比传统碳刷</span><span></span><span>言，无碳刷滑环可取消碳粉灰尘堆积和碳刷磨损带来的损耗、提升了</span><span>CT</span><span>系统的整体稳定性和耐</span><span></span><span>度。</span></span></p><p><p><img src="image/20201014/57f4684a26c929c6e9c1b14bbaa71e4b_8.png" /></p><br /></p><ul><li><p><span><strong><span>SSF
</span><span>冠脉运动追踪冻结技术</span></strong></span></p><p><span><span>SSF </span><span>冠脉运动追踪冻结技术<sup>［</sup></span><sup>5,6</sup><sup><span>］</span></sup><span>通过高清采样得到心脏运动过程中的一系列图像，在频域对冠脉运动（路径和速度）进行分析和建模，有效地压缩重建时间窗，得到清晰的冠脉解剖图像（如图</span><span>4</span><span>）。</span><span>SSF </span><span>使用的是一个心动周期内相邻期相的图像信息来描绘冠脉在一个心动周期内的运动特点，结合</span><span>0.28s</span><span>转速，可以将单扇区时间分辨率（</span><span>X/Y</span><span>轴）提高到</span><span>29ms</span><span>，保证了高心率的图像质量。</span></span></p></li></ul><p><p><img src="image/20201014/5eee284a02838d30b6ae00599bfea562_9.png" /></p><br /></p><p><span><strong><span>三、智能心电门控技术</span><span>Auto
ECG-Gating</span></strong></span></p><p><span><strong><span><br /></span></strong></span></p><p><span><span>要保证在任何心率（律）条件下，在一个心动周期内完成对心脏的采样，还需要配备智能的心电门控装置。</span><span>Revolution CT</span><span>的智能心电门控系统</span><sup> [1]</sup><span>可以智能识别心率和心律，匹配最佳的扫描和重建期相（如图</span><span>5</span><span>），保证了</span><span>1-beat</span><span>的成功率。</span></span><br /></p><p><p><img src="image/20201014/8a9edf5db85d010e8ed8bc4c1a802840_10.png" /></p><br /><span><strong><span>快的极致：</span><span>1-Beat
1-Stop </span><span>心脏成像</span><sup>[1, 7]</sup></strong></span></p><p><span><br /></span></p><p><span>16厘米<span>宽体宝石探测器、</span>Whispe
Drive<span>、</span>0.28s<span>旋转速度、</span>SSF<span>技术、智能心电门控，所有这些硬件技术都为了保证快的极致，任意心率</span>(<span>律）的</span>1-beat1-stop <span>心脏成像。</span></span></p><p><span><br /></span></p><p><span><span>Revolution
CT</span><span>可以在任意心率／律的情况下，在一个心动周期内获得冠脉解剖、室壁运动、瓣膜运动、心功能、心肌灌注的信息，为心脏评估提供全方位的信息。（如图</span><span>6</span><span>）</span></span></p><p><br /></p><p><strong><span><span>这就是</span><span>Revolution CT</span><span>带来的快的极致！</span></span></strong></p><p><strong><span><br /></span></strong></p><p><strong><span>参考文献：</span></strong></p><p><span>1, White Paper: Revolution Cardiac CT:The Comprehensive
Solution forCardiovascular Imaging. (2014). White Paper: Revolution Cardiac
CT:TheComprehensive Solution for Cardiovascular Imaging, 1–15.</span><span> </span></p><p><span>2, Husmann, L., Leschka, S., Desbiolles, L., Schepis,
T., Gaemperli,O., Seifert, B., et al. (2007). Coronary Artery Motion and Cardiac
Phases ependency on Heart Rate—Implications for CT Image Reconstruction 1.
Radiology,245(2), 567–576.doi:10.1148/radiol.2451061791</span><span> </span></p><p><span>3, White Paper: Revolution CT:Overcoming wide coverage
IQ challenges.(2014). White Paper: Revolution CT:Overcoming wide coverage IQ
challenges, 1–7.</span><span> </span></p><p><span>4, White Paper: Revolution CT:Whisper Drive Gantry
Design. (2014).White Paper: Revolution CT:Whisper Drive Gantry Design,
1–8.</span></p><p><span>5, Leipsic, J., Labounty, T. M.,
Hague, C. J., Mancini, G. B. J.,O'Brien, J. M., Wood, D. A., et al. (2012).
Effect of a novel vendor-specificmotion-correction algorithm on image quality
and diagnostic accuracy in personsundergoing coronary CT angiography without
rate-control medications. Journal ofCardiovascular Computed Tomography, 6(3),
164–171.doi:10.1016/j.jcct.2012.04.004 </span></p><p><span>6, Cardiac CT Advancement – Evolution of SnapShot*
Freeze Technology.(2013). Cardiac CT Advancement – Evolution of SnapShot* Freeze
Technology, 1–8.</span><span> </span></p><p><span>7, Addressing the clinical and economic opportunity of
challengingcardiac CT patients. (2014). Addressing the clinical and economic
opportunityof challenging cardiac CT patients, 1–6.</span></p><p><span><br /></span></p><p>感谢读完</p><p><span>本文由“<span><span> </span><span>CT影像资讯</span></span></span><span>”提供，器械科视频整理，转载请注明来源。</span><span></span></p><p><p><img src="image/20201014/7e7e722d88a93a487b5a85d07dac2d70_11.jpg" /></p><br /></p><p><span><span><strong><span><strong><span><strong>推荐文章</strong></span></strong></span></strong></span></span></p><p><span><span><strong><span><strong><span><strong></strong></span></strong></span></strong></span></span></p><p><span><strong><span>回复<span><strong><span><strong><span><strong><span><strong><span><strong><span>1</span></strong></span></strong></span></strong></span></strong></span></strong></span></span></strong></span><strong><span>阅读</span></strong>：<strong><span>医疗器械销售必读</span></strong></p><p><span><strong>回复<strong><strong><span><strong><span><strong><span><strong><span><strong><span>2</span></strong></span></strong></span></strong></span></strong></span></strong></strong></strong></span><span><strong><span>阅读</span></strong></span>：<span><span></span><strong><span>为什么公立医院购买的大设备会那么贵</span></strong></span></p><p><span><strong>回复<strong><span><strong><span><strong><span><strong><span><strong><span>3</span></strong></span></strong></span></strong></span></strong></span></strong></strong></span><strong><span>阅读</span></strong>：<span><span></span><strong><span>对比Siemens、Philips、GE、Toshiba高端CT</span></strong></span></p><p>。。。。。。</p><p><span><strong><span>回复 <strong><strong><span><strong><span><strong><span><strong><span><strong><span>精彩列表</span></strong></span></strong></span></strong></span></strong></span></strong></strong></span></strong></span> <strong><span>阅读</span></strong>：<strong><span><strong>可以获得我们为您精心准备的资讯。</strong></span></strong></p><p><br /></p><table width="522" cellspacing="0" cellpadding="0"><tbody><tr><td><fieldset><section><section><p><span><span></span></span></p><p><span><strong>微信公众号</strong>：</span></p><p><span><strong><span></span></strong></span></p><p><span>器械科公众号是200万医疗器械从业人员的交流平台，也是中国首家以医疗设备产品内容为核心，集产品数据、专业资讯、行业动态、受众互动为一体的新媒体平台。</span></p><p><br /></p><p><strong><span>器械科官方网站：</span></strong><br /></p><p><span><strong><strong>http://www.qixieke.com </strong></strong></span></p><p><span><strong><strong><span><strong>http://</strong>器械科.中国</span></strong></strong></span></p><p><span><strong><span><br /></span></strong></span></p><p><span><strong><span>器械科网创始人微信号：</span></strong><span> </span></span></p><p><span><strong>shiyun8766</strong></span></p><p><span><span><strong></strong></span><span>器械科网站创始人正在创立以传统医疗行业为依托的互联网相关服务的医疗设备交流推广群。欢迎对以互联网为平台推广模式感兴趣的人士加入！我们将对群内的朋友开放我们网站和公众号后台的相关数据及资源。如果你愿意加入并参与互动，请添加“shiyun8766”个人微信号。申请时请备注标明： 个人真实姓名 + 你的职位Title + 你所在的公司全称。例： 石云，CEO，器械科网站。欢迎志同道合的你加入！</span></span><span> </span></p></section></section></fieldset></td></tr></tbody></table><p><p><img src="image/20201014/97a88341587ee485aa05faaa9be44883_12.jpg" /></p></p><p><br /></p>
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发表于 2020-10-14 21:40:36