OAM light propagation through tissue

N Biton, J Kupferman, S Arnon - Scientific Reports, 2021 - nature.com
… results extend measured results to highly multi scattering media … photon absorption per unit
length is given by the absorption … authors investigated penetration through brain tissue, which …

Applications of near-infrared spectroscopy in neurocritical care

R Thomas, SS Shin, R Balu - Neurophotonics, 2023 - spiedigitallibrary.org
… In acute brain injury, NIRS can be used to measure … This is primarily controlled by vascular
smooth muscle cells lining the pial and … Lower scattering/high absorbance occurs in areas of …

Validation of the Openwater wearable optical system: cerebral hemodynamic monitoring during a breath-hold maneuver

CG Favilla, S Carter, B Hartl, R Gitlevich… - …, 2024 - spiedigitallibrary.org
… TCD provides a measure of cerebral blood flow velocity (… fluctuations of light scattered by
tissues to measure CBF. The … the reduced scattering coefficient, μ a is the absorption coefficient, …

Ultra-short laser pulses propagation through mouse head tissues: experimental and computational study

D Galiakhmetova, V Dremin, A Koviarov… - IEEE Journal of …, 2022 - ieeexplore.ieee.org
… pulse width is shorter than 100 ps, the absorption and scattering coefficients … brain tissue,
taking into account the absorption and scattering of the skin, skull, and upper layers of the brain

Near-infrared spectroscopy as a promising tool in stroke: Current applications and future perspectives

J Sun, R Pang, S Chen, H Chen, Y Xie… - Journal of Innovative …, 2021 - World Scientific
… The scattering is about 100 times more probable than absorption, 10 which makes that the …
the brain cortex (or the muscle tissue) and then be scattered back to the measurement surface …

Impairments of cerebral blood flow microcirculation in rats brought on by cardiac cessation and respiratory arrest

G Piavchenko, I Kozlov, V Dremin… - Journal of …, 2021 - Wiley Online Library
… of size of the neurons due to their wrinkling within brain … deviation for the intensity of the back
scattered light, <I> k is the … and deoxy- (560 nm) absorption peaks of haemoglobin, as well …

Time-of-flight resolved light field fluctuations reveal deep human tissue physiology

O Kholiqov, W Zhou, T Zhang, VN Du Le… - Nature …, 2020 - nature.com
… We illustrate how incorrect absorption assumptions, anisotropic RBC scattering, and …
Measuring blood flow in tissues such as the brain 9,10 is paramount, and methods of diffuse …

Detection of the chemical changes in blood, liver, and brain caused by electromagnetic field exposure using Raman spectroscopy, biochemical assays combined with …

Z Guleken, M Kula-Maximenko, J Depciuch… - Photodiagnosis and …, 2022 - Elsevier
… To measure oxidative load, we measured malondialdehyde (… The result of this scattering
measured with a spectrometer is … period at 412 nm absorbance values were measured. The unit …

In Vitro Study of Optical Properties of the Central Nervous System Components

VG Orlova, LP Safonova… - 2020 IEEE Conference of …, 2020 - ieeexplore.ieee.org
absorption and reduced scattering coefficients of tissue samples and the relative results of
the broadband measurements … the gray matter of the brain and the non-dissected brain. In the …

Simulation study on the effects of cancellous bone structure in the skull on ultrasonic wave propagation

I Michimoto, K Miyashita, H Suzuyama, K Yano… - Scientific Reports, 2021 - nature.com
… ) enables the measurement of cerebral blood flow velocity … These velocity results may also
imply changes of absorption … possible effects of ultrasound scattering in the cancellous section …