根据提供的数据实现CT图像的重建. data的列向量是0~180度的ct扫描数据(投影数据)。见附件Data.mat。参考ppt中的流程-According to data provided to achieve the reconstruction of CT images. Data column vector is 0 to 180 degrees ct scan data (projection data). Annex Data.mat. Ppt of process referenc