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Updated: Jul 16, 2025

Excitation-Scanning Hyperspectral Imaging Microscopy to Efficiently Discriminate Fluorescence Signals
Published on: August 22, 2019
Online spectral unmixing in gamma-ray spectrometry
Paul Malfrait1, Jérôme Bobin2, Anne de Vismes Ott1
1Institut de Radioprotection et de Sû,reté Nucléaire (IRSN), PSE-ENV/SAME/LMRE, F-91400 Orsay, France.
Abstract:
We introduced in a previous paper a time-dependent full-spectrum analysis algorithm speeding up the estimation of the activity of the radionuclides present in a sample. In this paper, we present a new version of the algorithm allowing online estimation. It uses only on a buffer of few segments while keeping the time information by using a time dependent regularization, thus reducing the size of the data matrices and the length of the processing of each iteration. The algorithm is optimized and tested on both simulated and measured spectra of aerosol samples.
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