发明授权
- 专利标题: Methods and apparatus for tube-spit correction
- 专利标题(中): 管it矫正的方法和装置
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申请号: US09721320申请日: 2000-11-22
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公开(公告)号: US06466645B1公开(公告)日: 2002-10-15
- 发明人: Jiang Hsieh , Jonathan R. Schmidt , Clarence L. Gordon, III , Joseph L. Block
- 申请人: Jiang Hsieh , Jonathan R. Schmidt , Clarence L. Gordon, III , Joseph L. Block
- 主分类号: H65G126
- IPC分类号: H65G126
摘要:
In one aspect, the present invention relates to tube-spit detection and correction. In an exemplary embodiment, and once a sample of projection data has been collected, the projection data is preprocessed in accordance with known preprocessing algorithms including applying a detector primary speed correction to the projection data. Such primary speed correction removes contamination of previous signal sample from the current sample. After primary speed correction, tube-spit detection is performed on the sample. Such detection can be performed using many different methods. Generally, the objective is to determine whether the x-ray source experienced a drop in power. If a tube-spit event is not detected, then processing proceeds with further preprocessing and image reconstruction. If a tube-spit event is detected, then a tube spit correction is performed. Generally, the objective of tube-spit correction is to remove image artifacts due to the occurrence of a tube-spit event. Many different methods can be utilized to perform tube-spit correction.
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