换一批
换一批摘要Purpose: Computed tomography (CT) has been widely applied in medical domain.Meanwhile, the excessive radiation dose delivered to the patients has caused great concerns.Limited-angle CT scan is an effective way to reduce the radiation dose.However, conventional filtered back-projection (FBP)algorithm leads to significant streak artifacts and artifacts nearby edges in this case.Iterative reconstruction methods (such as algebraic reconstruction technique (ART) or simultaneous algebraic reconstruction technique (SART)) have potential to reconstruct better images when the projection data is incomplete.However, reconstructed images still contain conspicuous artifacts.More advanced methods are needed urgently.
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关键词
computed tomographyimage reconstructionlimited-angle projectionnon-local means filteringartifacts nearby edges
母体文献
会议名称：
2015放射肿瘤物理学年会
长沙
2015年
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发布时间
2016-08-25
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