基于稳态辐射传输方程的小动物尺寸组织体扩散光学层析法

Diffuse Optical Tomography of Small-Animal-Sized Tissues Based on the Steady Radiative Transfer Equation

在Newton-Raphson逆模型框架下,发展了基于稳态辐射传输方程光子输运正模型和代数重建技术的扩散光学层析图像重建算法,并针对小尺寸组织体内部吸收和散射系数同时重建情况下的标准代数重建技术算法进行了改进,数值结果表明改进后的代数重建技术算法重建图像效果优于标准代数重建技术算法.

Based on the radiative transfer equation and the algebraic reconstruction technique,an advanced algorithm of diffusion optical tomography was developed within the framework of Newton-Raphson＇s inversion.The standard algebraic reconstruction technique was improved to achieve simultaneous reconstruction of both the absorption and the scattering images for small-animal-sized geometry.The numerical simulations validated the feasibility of the proposed scheme and demonstrated the superiority of the modified algebraic reconstruction technique over the standard one in separation of both the coefficients.