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MRI和CT的区别是什么?简单解释 - Practical Tips

MRI和CT的区别是什么?简单解释

by Corinna

MRI和CT是医学上常见的诊断工具,但它们有某些区别。这些方法是用来做什么的,我们在这里解释。

MRI和CT的区别:MRI诊断简单解释

大多数患者将MRI检查与不愉快的、冗长的、最重要的是嘈杂的检查联系起来。磁共振成像,或MRI,通过使用一个磁场来工作。在15-20分钟的检查中,病人躺在一个管子里。这就是磁共振治疗的工作方式:

  • 病人被放在一个沙发上。然后这个沙发被推入磁共振扫描仪。如果有必要,病人在检查前会被注射所谓的造影剂,这使医生以后更容易评估图像。
  •  检查本身需要15至20分钟。在检查过程中,病人会听到典型的核磁共振扫描仪的敲击声。
  •  核磁共振扫描仪会产生一个强大的磁场,大约比地球的磁场强10万倍。
  • 利用这个磁场,断层扫描仪逐层 “扫描 “身体,特别是病人的器官。
  •  医生使用诊断选项MRI,特别是当要检查器官时。
  • 据专家介绍,这项技术的一个优点是,与CT检查相比,没有使用有害的X射线。

The CT method simply explained

计算机断层扫描,或简称CT,与MRI诊断相比,它的工作原理是使用X射线。在检查过程中,病人也是在沙发上和机器里。然而,检查的时间要短得多。

  •  造影剂有时也用于CT检查。使用后,病人躺在被推入CT扫描仪的沙发上。
  • 现在机器使用X射线技术进行检查。这与传统的X射线检查的区别在于,CT是对整个身体进行 “扫描”。
  •  在检查过程中,通常只需要几分钟,断层扫描仪围绕病人旋转,以捕捉身体的每一个视图。
  •  现在拍摄的横断面图像由计算机辅助形成三维图像。
  •  计算机断层扫描具有快速检查的优势,因此经常被用于急救医学。此外,这种诊断形式特别适用于对人体骨骼进行成像。
  • CT的缺点是使用X射线,有时会对人的机体产生有害影响。

The harmful effects of X-rays in CT

虽然CT提供了许多好处,但重要的是要意识到X射线的潜在有害影响。

  • X射线辐射是一种高能量形式的电磁辐射。它能穿透组织并通过被身体的各种结构吸收而产生图像。虽然CT扫描期间的辐射剂量相对较低,但长期重复暴露在X射线下会带来健康风险。
  •  使用X射线的主要担忧之一是对遗传物质的潜在损害。X射线的能量足以使细胞中的DNA电离。
  • 在决定进行CT扫描时,医生和放射科医生必须权衡X射线的潜在风险。在某些情况下,准确诊断的好处可能超过辐射暴露的风险

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