The difference between an MRI and CT scan. CT 扫描和 MRI 都用于捕获您体内的图像。 最大的区别是 MRI(磁共振成像)使用无线电波,而 CT(计算机断层扫描)扫描使用 X 射线。 虽然两者的风险都相对较低,但存在差异,根据情况可能使每一个都成为更好的选择。 CT scans and MRIs are both used to capture imag...
The main difference between these two sophisticated imaging techniques is that CT (computed tomography) scans use X-rays while MRIs (magnetic resonance imaging) use radio waves. Both of them create detailed images of inner tissues and organs, but are used for different reasons depending on the ...
CT是X线计算机断层成像,优点是扫描速度快(几秒钟),对骨骼和肺组织分辨率高,检测费用较低。缺点主要...
正电子扫描(PET Scan)可显示细胞新陈代谢的情况,追踪早期癌细胞病变,电脑扫描(CT Scan)则可提供体内器官及肿瘤准确位置,两者结合可以检查病灶的形态、大小和新陈代谢率,有助于鉴别肿瘤。 虽然MRI和PET/CT Scan有助诊断癌症,但MRI检查期间,会产生噪音,可能会对人造成困扰和不安,而且空间受限,或会对幽闭恐惧症患者...
PET是功能成像 CT MRI是解剖成像 PET:灵敏度高,特异性不强(就是说只要发现异常的能力较好,但是异常有可能是生理正常的现象所致),分辨率较低 CT:CT为无创性检查,检查方便、快捷。 密度分辨力高,密度相差很小的不同组织通过窗技术就能能被区分(提供2000Hu左右)。 CT能提供横断面图象,并可进行...
虽然MRI和PET/CT Scan有助诊断癌症,但MRI检查期间,会产生噪音,可能会对人造成困扰和不安,而且空间受限,或会对幽闭恐惧症患者造成压力;而PET/ CT Scan毕竟带有辐射,不建议普通人以此作全身检查,除非已确诊癌症,或是具有家族遗传癌症病历的人士,才适宜在医生介绍下接受相关放射诊断。
The Difference Between a CT and a MRI Scan If you’ve ever heard of a Computed Tomography (CT) or Magnetic Resonance Imaging (MRI) machine, you may have wondered about the difference between the two. Both machines look nearly identical, since they each feature a round ‘donut’ and a mov...
Positron Emission Tomography (PET) scans measure emissions from positron-emitting molecules. Because many useful, common elements have positron emitting forms (carbon, nitrogen, and oxygen), valuable functional information can be obtained. This is the main difference between the CT and MRI scans. The...
CT scan vs. MRI brain in acute stroke settingAdvantages and disadvantages of ct scan and mri brain in showing cerebrovascular strokeAlaa
而我们传统影像扫描,在扫描过程中,物体肯定会运动,因为运动是绝对的,而静止是相对的。但是只要没有太大的运动伪影,无论是CT,还是MRI,得到的单一的一幅图像都是静态图或者叫做瞬时图。这种单一的图肯定不是动态的。 而要做MRI动态化扫描,就一定少不了时间这个维度,否...