Phantom surface, phantom stack, synthetic CT volumes

The phantom surface (pectoral girdle bones of a frog) was used to generate the pectoral girdle bones in the phantom stack. The phantom stack was used in a mathematical simulation of a cone-beam CT scan and the synthetic CT volumes were reconstructed using either the FDK_CUDA or the SIRT3D_CUDA algorithm (ASTRA toolbox for Matlab). Parameters that characterize the volume quality are given in the file names. “FDK”/”SIRT3D”: volume reconstruction algorithm; “mean”: mean value of the mean gray values of pectoral girdle bones and soft tissue; “CNR”: contrast to noise ratio of pectoral girdle bones and soft tissue. The scaling of the surface matches the scaling of the volumes if the voxel size is set to 1 unit.

本研究以青蛙肩带骨的体模表面为基准，生成体模序列中的肩带骨模型。该体模序列被应用于锥束CT扫描的数学仿真实验，并通过FDK_CUDA或SIRT3D_CUDA算法（基于Matlab的ASTRA工具箱）重建得到合成CT体数据。用于表征体数据质量的参数已在文件名中予以标注："FDK"/"SIRT3D"代表体数据重建算法；"mean"指代肩带骨与软组织的平均灰度值的均值；"CNR"（Contrast to Noise Ratio）为肩带骨与软组织的对比度噪声比。当体素尺寸设置为1单位时，该表面的缩放比例与体数据的缩放比例完全匹配。