JOINT ESTIMATION OF ATTENUATION AND ACTIVITY INFORMATION USING EMISSION DATA

摘要

Methods, systems and non-transitory computer readable media for imaging are disclosed. Emission projection data corresponding to a target region of a subject is acquired using an emission tomography system. Additionally, one or more magnetic resonance images of the target region are generated using a magnetic resonance imaging system operatively coupled to the emission tomography system. A partially-determined attenuation map is determined by identifying one or more regions in the partially-determined attenuation map with a designated confidence level based on the magnetic resonance images. Further, a complete attenuation map and/or a complete activity map is reconstructed from the emission projection data using the partially-determined attenuation map as a constraint. One or more images corresponding to the target region are then generated based on the partially-determined attenuation map, the complete attenuation map and/or the complete activity map.

主权项

1. A method, comprising:
acquiring emission projection data corresponding to a target region of a subject using an emission tomography system; generating one or more magnetic resonance images of the target region using a magnetic resonance imaging system, wherein the emission tomography system is operatively coupled to the magnetic resonance imaging system; determining a partially-determined attenuation map by identifying one or more regions in the partially-determined attenuation map with a designated confidence level based on the magnetic resonance images; reconstructing a complete attenuation map, a complete activity map, or a combination thereof, from the emission projection data using the partially-determined attenuation map as a constraint; and generating one or more images corresponding to the target region based on the partially-determined attenuation map, the complete attenuation map, the complete activity map, or combinations thereof.