Showing posts with label hemoglobin absorption. Show all posts
Showing posts with label hemoglobin absorption. Show all posts

Wednesday, 27 September 2023

Investigating the Vis-NIR Spectral and Structural Properties of the Cerebral Cortex in Human Brain Tissues | Chapter 3 | Current Perspective to Physical Science Research Vol. 1

 The objective of the study search out measure the optical features of gray matter in the cerebral peridium in a spectral range of 400–1100 nm, containing attenuation coefficients, scattering coefficients, uneven efficiency, and estimates of the seepage depth for optical image. The study aims to identify assimilation peaks and investigate structural possessions, such as neuron mass, using Beer's law and the Mie model. The judgments contribute to evolving noninvasive diagnostic imaging methods and therapies in the forthcoming-infrared (NIR) range for the using one's brain cortex in the human brain. Gray matter in the outer layer of the using one's brain cortex plays a significant part in information processes, to a degree reasoning and planning, apart from influencing data, emotion, memory, and vocabulary. In this paper, measurements of the ocular properties, such as the debilitation coefficients, scattering coefficients, uneven efficiency, and the infiltration depth of gray matter in the using one's brain cortex were calculated in the fresh brain fabric of a healthy human male at a ghostly range of 400–1100 nm. Determining the optical properties of the brain is important for evolving NIR noninvasive diagnostic imaging methods and therapies. The assimilation spectra of the gray matter tissues got here accompanied clear peaks at 550 and 580 nm due to oxyhemoglobin (HbO2) and at 970 nm due to water. The likely NIR optical depict depth was about 3.8 mm at 800 nm, determined by the theoretical limit happening from ballistic and snake photons. Using Beer’s regulation and the Mie model, structural properties (such as, neuron density) in the the brain of human brain tissue were examined for the first time. The mass of neurons in the examined gray matter fabric sample was estimated as about 40,000 neurons/mg. In addition, an extensive investigation is acted and a summary of optical characteristics, including scattering coefficients and transport time, for both silver and white matter in the human using one's brain cortex, is outlined established existing biography. The study will particularly emphasize checking the maximum distance light can traverse and the insight at which it can effectively pierce, which furthers noninvasive imaging of neurons in deep tissue domains. Recent techniques from the history are explored that highlight fundamental changes in the normal intellect, aging, and neurodegenerative diseases.

Author(s) Details:

Jamal H. Ali,
Department of Science, Borough of Manhattan Community College, The City University of New York, 199 Chambers St, New York, NY 10007, USA.

Please see the link here: https://stm.bookpi.org/CPPSR-V1/article/view/11917

Tuesday, 1 September 2020

A Novel Optical Oximeter via Absorption Spectra-Based CO2 Laser Photothermal Effects | Chapter 6 | Recent Research Advances in Biology Vol. 1

 

Spectroscopic and histological study of CO2 laser interaction with rats tissues were carried out. We

detected for the first time the changes in optical absorption spectra of rat's tissues with selective CO2

laser optical densities ranging from 20.64 to 34.40W/cm2. The laser exposed tissues show higher

absorbance in hemoglobin than that for the unexposed tissue. Using the same laser and same optical

densities, the absorption spectra of fresh blood were measured. Much intense peaks of hemoglobin in

the exposed fresh blood than that for the corresponding peaks for the tissue were detected. A scheme

based on recent experimental findings is proposed for explanation of this novel phenomenon. The

histological study shows thermal damage of blood vessels localized at the dermis layer. At high laser

optical densities a vessel rupture with hemorrhage were occurred. The results indicate a pronounced

modification of skin absorption properties by laser irradiation. Such an effect is due to thermally

induced biophysical and biochemical processes inside the highly heterogeneous tissue structure. A

clinical oximeter can be optimized by using CO2 laser Photothermal effects This device plays an

important role during COVID-19 pandemic.

 

Author (s) Details

Hassan H. Mohammed

Physics Department, College of Science, University of Basrah, Basrah, Iraq and Iraq University College, Department of Computer Engineering Technology, Alestiqlal Street, Basrah, Iraq.

Muzahim M. Abdullah

Physics Department, College of Science, University of Basrah, Basrah, Iraq.

Amjad Al-Asadi

Physics Department, College of Science, University of Basrah, Basrah, Iraq.

View Book :- https://bp.bookpi.org/index.php/bpi/catalog/book/239