System and method for reducing or eliminating stre

专利名称：System and method for reducing or

eliminating streak artifacts and illuminationinhomogeneity in CT imaging

发明人：José Tamez Peña,Saara Marjatta Sofia

Totterman,Kevin J. Parker

申请号：US10920298申请日：20040818公开号：US07406211B2公开日：20080729

专利附图：

摘要：In CT (computed tomography) images, streak artifacts caused by the presence

of metal implants and inhomogeneous estimation of tissue density are reduced oreliminated. The algorithm has two basic steps: 1) illumination correction and 2) adaptive3D filtering. The algorithm starts by estimating the direction of the streak and thedegree of inhomogeneous densities by gray scale morphology dilatation. Then, itproceeds to estimate the correct densities based on the estimations and to reduce thestreak by an adaptive 3D filtering whose parameters depend on the streak direction andthe local image contrast.

申请人：José Tamez Peña,Saara Marjatta Sofia Totterman,Kevin J. Parker

地址：Rochester NY US,Rochester NY US,Rochester NY US

国籍：US,US,US

代理机构：Blank Rome LLP

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