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Abstract

A method for identifying a moving radiation source by a radiation portal monitoring system is described. The radiation portal monitoring system includes a radiation portal monitor with a plurality of radiation detectors configured to detect ionizing radiation of the radiation source and to generate a detection signal responsive to detection of the ionizing radiation, and at least one processor executing the steps of providing an identification machine learning model; receiving labelled static identification training data generated by radiation detection of a plurality of known static radiation sources; introducing to the static identification training data modifications representing detection signal alterations caused by radiation source movement through the radiation portal monitor to obtain pseudo-dynamic identification training data; training the identification machine learning model using the pseudo-dynamic identification training data; and identifying the moving radiation source from the detection signal using the trained identification machine learning model.

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