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Temperature-dependent dielectric properties of human bone constituents at THz frequencies : contrast mechanisms and bound water dynamics
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Chopra, N., Shaw, N., Lotkowska, L., Sui, C., Navarro-Cia, M and Lloyd-Hughes, James (2022) Temperature-dependent dielectric properties of human bone constituents at THz frequencies : contrast mechanisms and bound water dynamics. In: 2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Delft, Netherlands, 28 Aug - 02 Sep 2022. Published in: 2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) ISBN 9781728194271. doi:10.1109/irmmw-thz50927.2022.9896085
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Official URL: https://doi.org/10.1109/irmmw-thz50927.2022.989608...
Abstract
THz time domain spectroscopy (THz-TDS) was used to investigate the dielectric properties of constituents of human bone. We report experimental values for refractive index and absorption coefficient for four major anhydrous constituents of bone: Collagen, Hydroxyapatite, Calcite and Amorphous calcium phosphate. We varied the sample temperature in order to explore the physical mechanisms underpinning the THz dielectric function of these constituents. Experimental data were well described using the Debye model for collagen, or the Lorentz model for mineral compounds, respectively. A fitting procedure based on Particle Swarm Optimization was implemented in order to extract the fitting parameters such as relaxation times and oscillator strengths.
Item Type: | Conference Item (Paper) | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
SWORD Depositor: | Library Publications Router | ||||
Journal or Publication Title: | 2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) | ||||
Publisher: | IEEE | ||||
ISBN: | 9781728194271 | ||||
Official Date: | 26 September 2022 | ||||
Dates: |
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DOI: | 10.1109/irmmw-thz50927.2022.9896085 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Conference Paper Type: | Paper | ||||
Title of Event: | 2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) | ||||
Type of Event: | Conference | ||||
Location of Event: | Delft, Netherlands | ||||
Date(s) of Event: | 28 Aug - 02 Sep 2022 |
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