Nina Reistad
Universitetslektor
Two-layer reconstruction of Raman spectra in diffusive media based on an analytical model in the time domain
Författare
Summary, in English
We derive and validate an analytical model that describes the migration of Raman scattered photons in two-layer diffusive media, based on the diffusion equation in the time domain. The model is derived under a heuristic approximation that background optical properties are identical on the excitation and Raman emission wavelengths. Methods for the reconstruction of two-layer Raman spectra have been developed, tested in computer simulations and validated on tissue-mimicking phantom measurements data. Effects of different parameters were studied in simulations, showing that the thickness of the top layer and number of detected photon counts have the most significant impact on the reconstruction. The concept of quantitative, mathematically rigorous reconstruction using the proposed model was finally proven on experimental measurements, by successfully separating the spectra of silicone and calcium carbonate (calcite) layers, showing the potential for further development and eventual application in clinical diagnostics.
Avdelning/ar
- Atomfysik
- Centrum för miljö- och klimatvetenskap (CEC)
- LTH profilområde: Teknik för hälsa
- LTH profilområde: Avancerade ljuskällor
- LU profilområde: Ljus och material
- LUCC: Lunds universitets cancercentrum
Publiceringsår
2023-11-15
Språk
Engelska
Sidor
40573-40591
Publikation/Tidskrift/Serie
Optics Express
Volym
31
Issue
24
Dokumenttyp
Artikel i tidskrift
Förlag
Optical Society of America
Ämne
- Atom and Molecular Physics and Optics
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 1094-4087