数字全息CT技术的发展与应用.pptx

数字全息CT技术的发展与应用;MRI图像反映了某种元素在体内的分布,它可以根据含水量区分不同组织， 例如脂肪多的组织含水较少，图像就比较亮，而血管或其他充满液体的部 分的图像则呈暗色．所以MRI对于分辨大脑的细节特别有效，并且可以观 测到大脑的血液和大脑的活动，即功能核磁共振成像(f—MRI)．;CT( Computed Tomography)－计算机断层扫描成像技术(X射线断层扫描+Computer); CT( Computed Tomography); CT( Computed Tomography); CT( Computed Tomography);重建图像显示;Optical CT (Optical Computed Tomography)－光学计??机断层扫描成像技术;OCT (Optical Coherence Tomography)－光学相干断层扫描技术 或　光学相干层析技术;OCT系统探测的是物体的后向散射光，因此不需要作以CT算法为基础的复杂的图像重构计算．针对半透明物体;OCT (Optical Coherence Tomography);已成功应用于：;即将孵出的小鸡胚胎;果蝇(幼虫在植物组织中的孵化);Digital Holographic Tomography－数字全息层析技术;Digital Holographic Tomography－数字全息层析技术;Tens Gabor in-line holograms were recorded with 5°step size at different directions. Typical photographs are show n in figure 5(a)-(d). By analog-to-digital process, each hologram w as digitalized and transferred into projection date by the computer. By 3D CT reconstruction of these projection data, three dimensional density distribution of the specimen can be obtained as shown in Figure 6.;Digital Holographic Tomography－数字全息层析技术;Digital Holographic tomography－数字全息层析技术;Digital Holographic tomography－数字全息层析技术;Digital Holographic tomography－数字全息层析技术;Digital Holographic tomography－数字全息层析技术;Digital Holographic tomography－数字全息层析技术;Digital Holographic tomography－数字全息层析技术;Digital Holographic tomography－数字全息层析技术;Digital Holographic tomography－数字全息层析技术;Digital Holographic tomography－数字全息层析技术;Digital Holographic tomography－数字全息层析技术;Digital Holographic tomography－数字全息层析技术;Digital Holographic tomography－数字全息层析技术;Digital Holographic tomography－数字全息层析技术;Digital Holographic tomography－数字全息层析技术