Detection Efficiency Modeling and Joint Activity and Attenuation Reconstruction in Non-TOF 3-D PET From Multiple-Energy Window Data

Emission-based attenuation correction (AC) methods offer the possibility of overcoming quantification errors induced by conventional MR-based approaches in PET and Magnetic Resonance (MR) (PET/MR) imaging. However, the joint problem of determining AC and the activity of interest is strongly ill-posed in non-time-of-flight (TOF) PET. This can be improved by exploiting the extra information arising from low energy window photons, but the...