X射线CT(Computer Tomography)将计算机图象处理技术和X射线技术相结合,可实时地观察和诊断人体的脑部、肝脏、胰腺、心脏等软组织和人体组织的病变。头颅CT对脑出血、脑栓塞、脑外伤、脑萎缩和颅脑病变的诊断效果尤为显著,被公认为无损伤检查颅脑病变的最有效的设备。由于物质的原子序数和密度的差异,对X射线的吸收系数μ不同,所以可由μ值的微小变化来区别不 Computer tomography combines computer image processing with X-ray technology to observe and diagnose lesions in soft tissues such as the brain, liver, pancreas and heart, and in human tissues in real time. Head CT on cerebral hemorrhage, cerebral embolism, traumatic brain injury, brain atrophy and craniocerebral lesions of the diagnosis is particularly significant, is recognized as the most effective equipment for examination of craniocerebral lesions without injury. Because of the difference in atomic number and density of matter, the absorption coefficient μ for X-rays is different, so a small change in μ value can be used to distinguish