【医械储备】医用专业灰阶显示器选择

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                    <p><span style="color: rgb(32, 32, 32); font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 20px;  background-color: rgb(255, 255, 255);"> </span><span style="font-size: 18px;"><strong style="color: rgb(32, 32, 32); font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 20px; white-space: normal; background-color: rgb(255, 255, 255);"></strong></span></p><h1 id="activity-name" style="white-space: normal; margin: 0px; font-weight: normal; font-size: 16px; max-width: 100%; color: rgb(62, 62, 62); font-family: 宋体; line-height: 24px; background-color: rgb(255, 255, 255); padding: 0px; word-wrap: break-word !important; box-sizing: border-box !important;"><img src="http://mmbiz.qpic.cn/mmbiz/A1DicCH9Vl6PsJ2RPQVaCYdl56sK9O5pyBdLrmbPbqCJkrgQaAeCuf1B1ccKCQlnp4aaBibeYiag47vcOwUFrU5fw/0" data-ratio="0.20725388601036268" data-w="386"  /></h1><p><span style="font-size: 18px;"><strong style="color: rgb(32, 32, 32); font-family: Arial, Helvetica, sans-serif; font-size: 12px; line-height: 20px; white-space: normal; background-color: rgb(255, 255, 255);"><img data-s="300,640" src="http://mmbiz.qpic.cn/mmbiz/A1DicCH9Vl6NFNkvibNI1cfBA5jr3kxVGYwmBibPD8scW7SficjnLWnIekiaibxUfF6REQyVlYj6yvfGMIHN5iamFcBlA/0" data-ratio="1.3513513513513513" data-w="370"  /></strong></span><br  /></p><p><strong>为什么选择医用专业灰阶显示器</strong><span style="font-size: 18px;"><span style="font-size: 12px; color: rgb(32, 32, 32); font-family: Arial, Helvetica, sans-serif; line-height: 20px; background-color: rgb(255, 255, 255);"> </span></span></p><p><br  /></p><p><span style="font-size: 18px;">1. 医用专业灰阶显示器和传统的胶卷都是单色的，医生更容易接受。</span></p><p><span style="font-size: 18px;">2. 为呈现细致的影象,医用灰阶显示器的分辨率都很高,如5M的分辨率为2048X2560。</span></p><p><span style="font-size: 18px;">3. 为了能够区别每个灰阶，医用显示器的亮度都很高，达到几百个CD/M2。</span></p><p><span style="font-size: 18px;">4. 医用显示器能够通过专用的校正仪和校正软件对显示器的输入和输出进行曲线校正，使之符合DICOM曲线。</span></p><p><span style="font-size: 18px;">5. 高灰阶，如10BIT，12BIT精确细致反映图象质量。</span></p><p><span style="font-size: 18px;">6. 一般搭配有专业的灰阶显卡。</span></p><p><span style="font-size: 18px;">7. 医用显示器经过国际质量的认证。  </span></p><p><br  /></p><p><span style="font-size: 18px;"><strong>医用专业灰阶显示器和一般彩色显示器的差异 </strong></span></p><p><br  /></p><p><span style="font-size: 18px;">1. 医用灰阶显示器和传统的胶卷都是单色的，医生更容易接受；而用彩色显示器表现单色的医学影象，又可能会有掉色的情况。</span></p><p><span style="font-size: 18px;">２. 医用灰阶显示器的亮度很高，这样就可以拉开每一个灰阶的差别，其亮度都在2百CD/M2以上；而彩色显示器的亮度一般在100以下。彩色显示器的原理是R、G、B三枪打出的三个电子束要通过一个荫罩板（shadow ｍａｓｋ）的，在通过的时候，吸收或挡住了电子束的大部分能量，所以器亮度就<br  />大大降低；而灰阶显示器是电子束直接打到荧光粉上，能量的损耗就小，所以亮度比较高。</span></p><p><br  /><span style="font-size: 18px;"><strong>竖屏显示器和横屏显示器的差异和应用</strong> </span></p><p><br  /></p><p><span style="font-size: 18px;">    目前市场上的商用显示器都是横屏的，如分辨率为1024X768的显示器，表示共有768行，每行有1024个点组成；而竖屏正好与之相反，如上述的分辨率在该显示器上为768X1024。</span></p><p><span style="font-size: 18px;">竖屏显示器和横屏显示器在医学上有各自不同的应用。如竖屏适合CR、DR等；而横屏多应用与CT、心血管造影、数字减影等。</span></p><p><br  /></p><p><span style="font-size: 18px;"><strong>医用显示器的DICOM曲线</strong> </span></p><p><br  /></p><p><span style="font-size: 18px;">    DICOM曲线是显示器特性中最重要的参数之一，它直接反映该显示器的性能。 关于显示器的输入和输出，由于电子元器件的特性，它并不是线形的关系。输入输出特性曲线的两端，输入的变化引起的输出的变化不够明显，假设最大的输入和最大的输出都是0-99，在开始阶段，输入是5，也许其输出只是2，如果这种情况直接应用在医学的影像上，就会发现显示器无法正确辨认出一些细微的软组织的密度变化。为了给医用显示器的性能指定一个规范，世界医学组织制定了DICOM标准，就是为了拉大每个灰阶的差异，即在输入是5的情况下，使输出也为5。  </span></p><p><br  /></p><p><span style="font-size: 18px;"><strong>医用显示器的维护和校正</strong> </span></p><p><br  /></p><p><span style="font-size: 18px;">医用显示器是极其精致的，直接关系到人的生命安全，所以定期的显示器的性能检验是非常必要的，这个性能检验我们称之为校正。（提供专业医用显示器）</span></p><p><span style="font-size: 18px;">由于不同显示器在不同的摆放环境下，以及它本身固有的衰减，原来标准的输入输出DICOM曲线，会不再符合这一标准，于是就要通过专业的校正仪器和软件，重新调整调整。</span></p><p style=""><span style="max-width: 100%; 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