METHODS AND APPARATUS FOR TUBE-SPIT CORRECTION

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 (102), 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 (106) on the sample. Such detection can be performed using many different methods. Generally, the objective is to determine whether the x-ray source (14) experienced a drop in power. If a tube-spit event is not detected (108), then processing proceeds with further preprocessing (112) and image reconstruction (114). If a tube-spit event is detected, then a tube spit correction is performed (110). 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.