IMPROVED MODEL FOR COMPUTERIZED TOMOGRAPHY

Expressway construction in karst developing area,which need exact information of karst.Cross-well seismic computerized tomography is a geophysical exploration method,which use seismic wave to explore the media between wells.It can provide high resolution image of the target.LTI and SIRT are widely used in computerized tomography,improved model method for computerized tomography which's based on that.It consider that a better initial model can improve the accuracy and efficiency of the algorithm,and the distribution of residual error in SIRT can also improve the result of inversion.In some degree,the method improve the result by the numerical modeling experiment.