Journal article · Preprint article
Optimal recovery of a radiating source with multiple frequencies along one line
We study an inverse problem where an unknown radiating source is observed with collimated detectors along a single line and the medium has a known attenuation. The research is motivated by applications in SPECT and beam hardening. If measurements are carried out with frequencies ranging in an open set, we show that the source density is uniquely determined by these measurements up to averaging over levelsets of the integrated attenuation.
This leads to a generalized Laplace transform. We also discuss some numerical approaches and demonstrate the results with several examples.
Language: | English |
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Year: | 2020 |
Pages: | 967-983 |
ISSN: | 19308345 and 19308337 |
Types: | Journal article and Preprint article |
DOI: | 10.3934/ipi.2020044 |
ORCIDs: | Brander, Tommi Olavi |
Attenuated Radon transform Beam hardening Emission computed tomography Inverse source problem Laplace transform Multiplicative system theorem Multispectral Nuclear Medicine PET SPECT Uniqueness theorem
44A10 (Primary) 65R32 44A60 46N40 65Z05 (Secondary) cs.NA math.FA math.NA