中文摘要：

通过建立与分析生物发光断层成像的系统方程，提出了一种新的多光谱光学参数等效方法，将多光谱生物发光断层成像问题转换成与之等价的混合谱问题，从而有效降低了系统方程的规模和计算量．研究结果表明：新提出的光源加权法，比现有的算术平均法更加准确、鲁棒，相对误差始终在5％以内．

英文摘要：

On the basis of the establishment and analysis of the bioluminescence tomography （BLT） system equation, a new equivalent method for multi-spectral optical coefficients is proposed, which convertes the multi-spectral BLT problem into the equivalent mixed-spectral version, thus reducing the dimension and overhead of the system equation. Results demonstrate that this new source weighted method （SWM） is much more accurate and robust than the available arithmetic average method （AAM）, keeping the relative error of less than 5 %.