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Comparison of dermal vs internal light administration in human lungs using the TDLAS-GASMAS technique—Phantom studies

Larsson, Jim LU ; Leander, Dennis ; Lewander Xu, Märta ; Fellman, Vineta LU ; Bood, Joakim LU and Krite Svanberg, Emilie LU (2019) In Journal of Biophotonics 12(8).
Abstract

Oxygen and water vapor content, in the lungs of a 3D-printed phantom model based on CT-images of a preterm infant, is evaluated using Tunable Diode Laser Absorption Spectroscopy (TDLAS) in Gas in Scattering Media Absorption Spectroscopy (GASMAS), that is, the TDLAS-GASMAS technique. Oxygen gas is detected through an absorption line near 764 nm and water vapor through an absorption line near 820 nm. A model with a lung containing interior structure is compared to a model with a hollow lung. Compared to the model with the hollow lung, both the mean absorption path length and the transmitted intensity are found to be lower for the model with the structured lung. A new approach, where laser light is delivered internally into the model... (More)

Oxygen and water vapor content, in the lungs of a 3D-printed phantom model based on CT-images of a preterm infant, is evaluated using Tunable Diode Laser Absorption Spectroscopy (TDLAS) in Gas in Scattering Media Absorption Spectroscopy (GASMAS), that is, the TDLAS-GASMAS technique. Oxygen gas is detected through an absorption line near 764 nm and water vapor through an absorption line near 820 nm. A model with a lung containing interior structure is compared to a model with a hollow lung. Compared to the model with the hollow lung, both the mean absorption path length and the transmitted intensity are found to be lower for the model with the structured lung. A new approach, where laser light is delivered internally into the model through an optical fiber, is compared to dermal light administration, that is, illumination onto the skin, for the model with structure inside the lung. The internal light administration generally resulted in larger gas absorption, and higher signal-to-noise ratios, compared to the dermal light administration. The results from the phantom measurements show great promise for the internal illumination approach and a natural next step would be to investigate it further in clinical studies.

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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
3D-print, GASMAS, light scattering, optical phantom, oxygen evaluation, preterm infant, TDLAS
in
Journal of Biophotonics
volume
12
issue
8
article number
e201800350
publisher
John Wiley and Sons Inc.
external identifiers
  • pmid:30993871
  • scopus:85065302630
ISSN
1864-063X
DOI
10.1002/jbio.201800350
language
English
LU publication?
yes
id
9d612aee-b16b-4665-84e0-35e3546a178c
date added to LUP
2019-05-24 11:17:55
date last changed
2020-10-27 02:04:17
@article{9d612aee-b16b-4665-84e0-35e3546a178c,
  abstract     = {<p>Oxygen and water vapor content, in the lungs of a 3D-printed phantom model based on CT-images of a preterm infant, is evaluated using Tunable Diode Laser Absorption Spectroscopy (TDLAS) in Gas in Scattering Media Absorption Spectroscopy (GASMAS), that is, the TDLAS-GASMAS technique. Oxygen gas is detected through an absorption line near 764 nm and water vapor through an absorption line near 820 nm. A model with a lung containing interior structure is compared to a model with a hollow lung. Compared to the model with the hollow lung, both the mean absorption path length and the transmitted intensity are found to be lower for the model with the structured lung. A new approach, where laser light is delivered internally into the model through an optical fiber, is compared to dermal light administration, that is, illumination onto the skin, for the model with structure inside the lung. The internal light administration generally resulted in larger gas absorption, and higher signal-to-noise ratios, compared to the dermal light administration. The results from the phantom measurements show great promise for the internal illumination approach and a natural next step would be to investigate it further in clinical studies.</p>},
  author       = {Larsson, Jim and Leander, Dennis and Lewander Xu, Märta and Fellman, Vineta and Bood, Joakim and Krite Svanberg, Emilie},
  issn         = {1864-063X},
  language     = {eng},
  number       = {8},
  publisher    = {John Wiley and Sons Inc.},
  series       = {Journal of Biophotonics},
  title        = {Comparison of dermal vs internal light administration in human lungs using the TDLAS-GASMAS technique—Phantom studies},
  url          = {http://dx.doi.org/10.1002/jbio.201800350},
  doi          = {10.1002/jbio.201800350},
  volume       = {12},
  year         = {2019},
}