【视频】可怕的核磁共振

admin

                    

                    

                    
                    
                    <p style="line-height: 1.75em; margin-bottom: 15px;"><iframe src="https://v.qq.com/iframe/player.html?vid=s0145bu7b0y&auto=0" width="100%" height="580" frameborder="0"></iframe><br  /></p><section class="tn-Powered-by-gulangu" style="margin-top: 0.8em; border: 0px; vertical-align: baseline; -webkit-font-smoothing: antialiased; white-space: normal; background-color: rgb(247, 247, 247); color: rgb(62, 62, 62); max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><section class="tn-Powered-by-gulangu" style="border: 0px; font-family: inherit; font-size: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; -webkit-font-smoothing: antialiased; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><p>据<span style="color: inherit; font-family: inherit; font-size: 1em; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; text-align: justify; text-decoration: inherit;">英国《每日邮报》报道，一群科学家近日在YouTube上发</span>布了一个视频，展现了磁共振(MRI)扫描仪所具有的强大磁场。通过这个视频，我们也可以直观地了解为什么医学专家会严格要求金属物体远离磁共振成像仪器。</p><p><br  /></p></section><section class="tn-Powered-by-gulangu" style="border: 0px; font-family: inherit; font-size: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; -webkit-font-smoothing: antialiased; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></section><p style="border: 0px; font-family: inherit; font-size: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.75em; vertical-align: baseline; -webkit-font-smoothing: antialiased; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important; margin-bottom: 15px;"><span class="tn-Powered-by-gulangu" style="border: 0px; font-family: inherit; font-size: 1em; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; -webkit-font-smoothing: antialiased; text-align: justify; text-decoration: inherit; color: inherit; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">首先用来测试磁场力量的一个钢制锁扣。在被扔到磁共振扫描仪里面后，这个锁扣猛烈地碰撞着仪器内壁，然后紧紧吸附在扫描仪表面。接下来，科学家又将一个订书机扔了进去，结果订书机撞得&quot;四分五裂&quot;。</span></p><section class="tn-Powered-by-gulangu" style="border: 0px; font-family: inherit; font-size: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; -webkit-font-smoothing: antialiased; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></section><p style="border: 0px; font-family: inherit; font-size: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.75em; vertical-align: baseline; -webkit-font-smoothing: antialiased; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important; margin-bottom: 15px;"><span class="tn-Powered-by-gulangu" style="border: 0px; font-family: inherit; font-size: 1em; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; -webkit-font-smoothing: antialiased; text-align: justify; text-decoration: inherit; color: inherit; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">之后，科学家将一把连接着重力计的扳手放到了扫描仪中，在磁场作用下，扳手上下晃动，最终猛烈地吸在仪器底部。重力计的数值显示，扳手受到的拉力高达500磅(约合230千克)。为了更好地展现磁共振扫描仪的磁场力，科学家将扳手换成了一把椅子。他们将椅子绑好，连接到重力计上，很快就看到椅子被吸向扫描仪。在700磅(约合320千克)拉力时，椅子刚进入扫描仪，接着重力计数值上升到1300磅(约合590千克)，然后在1700磅(约合770千克)时，椅子后背的靠枕由于撞击而掉落。</span></p></section><section class="tn-Powered-by-gulangu" style="border: 0px; font-family: inherit; font-size: 1em; vertical-align: baseline; -webkit-font-smoothing: antialiased; color: inherit; white-space: normal; background-color: rgb(247, 247, 247); clear: both; text-align: justify; text-decoration: inherit; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><p style="border: 0px; font-family: inherit; font-size: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.75em; vertical-align: baseline; -webkit-font-smoothing: antialiased; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important; margin-bottom: 15px;">随着椅子逐渐被拉向扫描仪，绳子也拉得越来越紧。</p><section style="border: 0px; font-family: inherit; font-size: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; -webkit-font-smoothing: antialiased; width: 0px; height: 0px; clear: both; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></section></section><section class="tn-Powered-by-gulangu" style="margin-top: 0.8em; margin-bottom: 0.2em; border: 0px; vertical-align: baseline; -webkit-font-smoothing: antialiased; white-space: normal; background-color: rgb(247, 247, 247); color: rgb(62, 62, 62); width: 670px; clear: both; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><section style="border: 0px; font-family: inherit; font-size: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; -webkit-font-smoothing: antialiased; width: 0px; height: 0px; clear: both; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></section></section><section class="tn-Powered-by-gulangu" style="border: 0px; font-family: inherit; font-size: 1em; vertical-align: baseline; -webkit-font-smoothing: antialiased; color: inherit; white-space: normal; background-color: rgb(247, 247, 247); clear: both; text-align: justify; text-decoration: inherit; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><p style="border: 0px; font-family: inherit; font-size: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.75em; vertical-align: baseline; -webkit-font-smoothing: antialiased; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important; margin-bottom: 15px;">随着重力计的数值达到1700磅（约合770千克），椅子的后背靠枕由于撞击掉了下来，引起众人的惊叫。</p><section class="tn-Powered-by-gulangu" style="border: 0px; font-family: inherit; font-size: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; -webkit-font-smoothing: antialiased; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></section><section style="border: 0px; font-family: inherit; font-size: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; -webkit-font-smoothing: antialiased; width: 0px; height: 0px; clear: both; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></section></section><section class="tn-Powered-by-gulangu" style="border: 0px; font-family: inherit; font-size: 1em; vertical-align: baseline; -webkit-font-smoothing: antialiased; color: inherit; white-space: normal; background-color: rgb(247, 247, 247); clear: both; text-align: justify; text-decoration: inherit; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><p style="border: 0px; font-family: inherit; font-size: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.75em; vertical-align: baseline; -webkit-font-smoothing: antialiased; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important; margin-bottom: 15px;">在视频的最后，重力计的数值显示为2000磅(约合910千克)，用科学家的话来说，&quot;相当于一辆小汽车的重量&quot;。&quot;<span style="border: 0px; font-family: inherit; font-size: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; -webkit-font-smoothing: antialiased; color: rgb(255, 104, 39); max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">这就是为什么在磁共振室内不用带轮子的椅子的原因</span>，&quot;科学家总结道。</p><section class="tn-Powered-by-gulangu" style="border: 0px; font-family: inherit; font-size: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; -webkit-font-smoothing: antialiased; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></section><p style="border: 0px; font-family: inherit; font-size: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.75em; vertical-align: baseline; -webkit-font-smoothing: antialiased; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important; margin-bottom: 15px;">磁共振扫描仪利用强大的磁场作对水分子的质子产生作用，而水是组成人体的最主要成分。利用特定频率的无线电波，可以确定病人身体中质子的&quot;排列&quot;，从而获得体内不同类型组织的详细图像。磁共振成像扫描仪所需的磁场非常强，因此有明确的警示:不能使任何金属物体靠近扫描仪。磁共振扫描仪具有的磁场强度一般为1.5到3特斯拉，而我们日常见到的冰箱贴只有约0.005特斯拉。实验中所用的是一台磁场强度为4特斯拉的磁共振扫描仪。</p></section><hr  /><p style="white-space: normal;">观看更多精彩视频，请  <strong> 阅读原文</strong>  到<br  /></p><p style="white-space: normal;"><br  /></p><p style="white-space: normal; text-align: center;"><strong> 部落</strong></p><p style="white-space: normal; text-align: center;"><br  /></p><hr style="white-space: normal; color: rgb(131, 104, 28); font-family: Avenir, sans-serif;"  /><p style="white-space: normal; color: rgb(131, 104, 28); font-family: Avenir, sans-serif; line-height: 1.75em; text-align: center;"><span style="font-size: 14px;"></span><br  /></p><p style="white-space: normal; color: rgb(131, 104, 28); font-family: Avenir, sans-serif; line-height: 1.75em; text-align: center;"><span style="font-size: 12px;">ID: </span><span style="font-size: 12px;"></span></p><p style="white-space: normal; color: rgb(131, 104, 28); font-family: Avenir, sans-serif; line-height: 1.75em; text-align: center;"><span style="font-size: 12px;">最具人气的医疗器械维修新媒体平台</span></p><p style="white-space: normal; color: rgb(131, 104, 28); font-family: Avenir, sans-serif; line-height: 1.75em; text-align: center;"><span style="font-size: 12px;">分享医疗器械前沿动态、医疗器械维修经验        </span></p><p style="white-space: normal; color: rgb(131, 104, 28); font-family: Avenir, sans-serif; line-height: 1.75em; text-align: center;"><span style="color: inherit; font-size: 12px; font-weight: inherit; text-decoration: inherit;"></span><span style="color: inherit; font-weight: inherit; text-decoration: inherit; font-size: 10px;">加群主微信 <strong><span style="font-size: 10px; color: rgb(84, 141, 212);">shanying916</span></strong> 与更多行业从业人员互动交流</span><span style="color: inherit; font-size: 1em; font-weight: inherit; text-decoration: inherit;"></span><strong style="color: inherit; font-size: 1em; text-decoration: inherit; line-height: 1.75em;"><span style="color: rgb(127, 127, 127); font-size: 12px;"></span></strong></p><p style="white-space: normal; color: rgb(131, 104, 28); font-family: Avenir, sans-serif; line-height: 1.75em; text-align: center;"><strong><span style="color: rgb(127, 127, 127); font-size: 12px;"><img data-s="300,640" data-type="jpeg" src="http://mmbiz.qpic.cn/mmbiz/A1DicCH9Vl6MoypciaNOibiaxmVLk8eA6ibKL14uWjKsZwrWboQYKTfXqPicXycwL1icfia1pAG0VzlTX3MRR4FPV0ZtZA/0?wx_fmt=jpeg" data-ratio="1.0136054421768708" data-w="147" style="float: none;"  /></span></strong></p>