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• W2887244687 abstract "This work is based on a cooperative co-evolution algorithm called `Fly Algorithm', which is an evolutionary algorithm (EA) where individuals are called `flies'. It is a specific case of the `Parisian Approach' where the solution of an optimisation problem is a set of individuals (e.g. the whole population) instead of a single individual (the best one) as in typical EAs. The optimisation problem considered here is tomography reconstruction in positron emission tomography (PET). It estimates the concentration of a radioactive substance (called a radiotracer) within the body. Tomography, in this context, is considered as a difficult ill-posed inverse problem. The Fly Algorithm aims at optimising the position of 3-D points that mimic the radiotracer. At the end of the optimisation process, the fly population is extracted as it corresponds to an estimate of the radioactive concentration. During the optimisation loop a lot of data is generated by the algorithm, such as image metrics, duration, and internal states. This data is recorded in a log file that can be post-processed and visualised. We propose using information visualisation and user interaction techniques to explore the algorithm's internal data. Our aim is to better understand what happens during the evolutionary loop. Using an example, we demonstrate that it is possible to interactively discover when an early termination could be triggered. It is implemented in a new stopping criterion. It is tested on two other examples on which it leads to a 60% reduction of the number of iterations without any loss of accuracy." @default.
• W2887244687 created "2018-08-22" @default.
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• W2887244687 date "2018-08-01" @default.
• W2887244687 modified "2023-09-27" @default.
• W2887244687 title "Data exploration in evolutionary reconstruction of PET images" @default.
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• W2887244687 doi "https://doi.org/10.1007/s10710-018-9330-7" @default.
• W2887244687 hasPublicationYear "2018" @default.
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