高散射介质中光子扩散成像的线性平移不变性

On the Linear Shift Invariance of Photon Diffusive Imaging in High Scattering Media

运用微扰理论探讨了光子扩散成像的线性平移不变性 ,阐明了光子扩散成像用于生物组织这一高散射介质结构与功能成像的信号形成机理。光子扩散成像所得的图像是介质内部异常结构通过光子扩散成像系统的响应。

The linear shiftinvariance of photon diffusive imaging in high scatter media is analysised based on the perturbation approximation.The image formation mechanism of the photon diffusive imaging system is illustrated forthe noninvasive imaging measurements in medical application.The image obtained with this technique is a response of the inhomogeneities inside the sample to the imaging system.The feature of the photon diffusive imaging system can thus be characterized with a pulse spreading function.