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Simultaneous Reconstruction of Emission Activity and Attenuation Coefficient Distribution from TOF Data, Acquired with External Shell Source
Simultaneous Reconstruction of Emission Activity and Attenuation Coefficient Distribution from TOF Data, Acquired with External Shell Source
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机译:从TOF数据同时重建发射活动和衰减系数分布(使用外部壳源获得)
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摘要
Methods, and systems therefrom, for generating images from time of flight (TOF) data associated with a scan of at least one object using a positron emission tomography system are provided. The method includes providing initial values for an activity image to yield a current activity image. The method also includes estimating initial values for an attenuation map (μ-map) image based on the TOF data to yield a current μ-map image. The method further includes repeating, until at least one termination condition is met, the steps of updating the current activity image based on at least the current μ-map and a first update algorithm and updating the current μ-map image based on at least on the updated activity image and a second update algorithm. The method also includes outputting an image of the at least one object based on the current μ-map and the current activity image.
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