| 摘要 |
A method and system are provided for more accurately and reliably characterising radioactive activity sources within a material through the use of a measurement data set from the detected emissions which is compared with a computed data set produced by a model of the location to which one or more candidate solutions for the position and/or activity for one or more model activity sources are provided. Optimisation of the match between the two data sets provides, for the characterisation.
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