Development of component-based normalization correction for the Clear-PEM system

We are developing a component-based normalization correction for the Clear-PEM positron emission mammography system. This system consists of two opposing parallel planar detectors that rotate around the breast. The distance between detector plates can vary to adapt to the patient and scintillation light is read at two ends of the crystals for Depth of Interaction (DOI) information. The normalization model currently accounts for intrinsic and geometric efficiencies using new methods specifically developed for this purpose. Both efficiencies are calculated from data obtained with a planar source that is parallel to the two detector plates. Support for other components (deadtime and DOI) is currently being developed. The whole normalization scheme is in the process of being assessed with real data using planar and cylindrical sources.