Multi-Resolution CT Reconstruction Based on EMD Method

A multi-resolution CT reconstruction method based on EMD(Empirical Modal Decomposition) was presented. This method took advantage of the character of that EMD as a self-adaptive filter and the linear nature in the reconstruction process. Firstly, using EMD method decomposed the projection data. Afterward, the IMF(Intrinsic Mode Function) which contained the feature information needed was reconstructed. Since each IMF represented the signal characteristics of the different scales, it was able to directly reconstruct different image feature. Thus it could achieve the multi-resolution CT reconstruction. The experimental results showed that, this method could directly obtain multiple features of reconstructed image in reconstruction process.