Development of a detector array simulation model for the low-dose stationary tomographic Molecular Breast Imaging camera with 3D CZT detectors
Abstract
A novel stationary tomographic Molecular Breast Imaging system (MBI) is being developed by Kromek and University College London. The new system combines the superior energy, position and depth of interaction (DOI) resolution of CZT detectors, wide range angular sampling of MPH collimators and novel de-multiplexing image reconstruction to mitigate the MBI drawbacks (higher than mammography patient dose and long imaging time of 40 min) without compromising diagnostic content.A new detector simulation model is being developed to facilitate the design and optimisation of a large MBI prototype. The existing simulation model, based on the principles described by Prettyman in 1999, has been extended to calculate a time-dependent solution, delivering charge pulse shapes, and using them to simulate the operation of a pulse shaping amplifier. The new model delivers more precise modelling of inter-pixel charge sharing and DOI effects, required for optimisation of the new MBI camera design and creation of large training data sets for machine learning algorithms for data analysis and image reconstruction.
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