A microspectroscopic tomography method is performed for a nondestructive three dimentional (3D) imaging. The synchrotron radiation infrared (SRIR) is used as a light source. A MiTeGen loop and a bird feather barb are taken as check samples. Their IR spectral informations are collected by raster scanning procedure with the incompleted projection mappings. Their 3D tomographic reconstructions are obtained by the penalized maximum likelihood algorithm with weighted linear and quadratic penalties (PML-Hybrid algorithm). The computed algorithm reconstructs the MiTeGen loop in the 1638–1572 cm⁻¹ region, which corresponds to the NH bend vibration. Besides, the bird feather barb is measured in the mid-infrared spectral region, and the main characteristic absorption bands include amide A, the lipids, and amide I. Their 3D reconstruction images are obtained from three selected absorption bands. The results show that the 3D tomographic method presents a good signal-to-noise ratio (SNR). The 3D distributions of chemical compositions are obtained for the MiTeGen loop and the bird feather barb by SRIR microspectroscopic tomography.

显微层析X射线断层摄影方法用于非破坏性的三维三维（3D）成像。同步辐射红外（SRIR）用作光源。将MiTeGen回路和鸟羽倒钩作为检查样本。它们的红外光谱信息是通过不完整的投影映射通过光栅扫描程序收集的。他们的3D层析成像重建是通过具有加权线性和二次罚分的罚分最大似然算法（PML-Hybrid算法）获得的。计算的算法重建1638–1572 cm ^-1中的MiTeGen循环对应于NH弯曲振动的区域。此外，在中红外光谱区域测量了鸟羽倒钩，主要特征吸收带包括酰胺A，脂质和酰胺I。它们的3D重建图像是从三个选定的吸收带中获得的。结果表明3D层析成像方法具有良好的信噪比（SNR）。通过SRIR显微层析成像技术获得了MiTeGen环和鸟羽倒钩的化学成分的3D分布。