Design and Simulation of Regional Differently Filtering Method of FBP Algorithm for Multilayer Spherical Shell

doi:10.16182/j.issn1004731x.joss.201612026

Abstract

Abstract: Aiming at the CT detection technology research for multilayer spherical shell with great density difference, the parallel beam CT projection and image reconstruction system model were built and a software platform was developed. Combined with theoretical analysis and computer simulation, the filtering method of FBP theory for image reconstruction was focused on. A special scanning mode was limited to make the projection sinogram of multilayer spherical shell show a regional spatial distribution, which was divided up combined with image analysis and priori knowledge. Then, according to the frequency characteristic and reconstruction demand, RL and SL functions were respectively used to filter projection data of different regions. The simulation results show that the proposed method can obtain better image reconstruction results compared with the single function filter in the traditional FBP algorithm.

Key words: CT, filter back projection, image reconstruction, multilayer sphere, simulation

CLC Number:

TP391.7

Xia Jingtao, Wang Qunshu, Ma Jiming, Hei Dongwei, Sheng Liang, Wei Fuli, Song Guzhou. Design and Simulation of Regional Differently Filtering Method of FBP Algorithm for Multilayer Spherical Shell[J]. Journal of System Simulation, 2016, 28(12): 3061-3066.

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