Přístupnostní navigace
E-application
Search Search Close
Publication detail
TORNOW, R. ODSTRČILÍK, J. KOLÁŘ, R.
Original Title
A multi-color video-ophthalmoscopes allows to measure the spectral distribution of light absorption of blood in the human retina
Type
journal article in Web of Science
Language
English
Original Abstract
Based on our previously developed mono-color video-ophthalmoscope a multi-color video-ophthalmoscope was developed. Using narrow band transmission filters, this instrument allows to measure the pulsatile cardiac cycle induced blood volume changes in the human retina for any wavelength in the sensitivity range of the used CMOS-camera. In this key experiment, video sequences (8 s, 25 fps, 200 frames) of the optic nerve head (ONH) were acquire for seven wavelengths between 475 nm and 677 nm one after the other. After image registration of all frames of each video sequence (to compensate for eye movements) and trend correction (to compensate for slow intensity changes), the amplitude of the cardiac cycle induced light intensity changes (pulsatile absorption amplitude PAA) can be calculated for all seven wavelengths. The results confirmed that the spectral distribution of PAA (lambda) follows the distribution of the light absorption of blood. The measured values correspond to the absorption of a thin blood layer of about 0.5 mu m thickness.
Keywords
blood light absorption; photoplethysmography; video ophthalmoscopy; retina; multi-color imaging; retinal imaging
Authors
TORNOW, R.; ODSTRČILÍK, J.; KOLÁŘ, R.
Released
16. 3. 2023
Publisher
Frontiers
Location
LAUSANNE
ISBN
2296-858X
Periodical
Frontiers in Medicine
Year of study
10
Number
1
State
Swiss Confederation
Pages from
Pages to
6
Pages count
URL
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10060599/pdf/fmed-10-1125154.pdf
Full text in the Digital Library
http://hdl.handle.net/11012/213626
BibTex
@article{BUT183401, author="Ralf-Peter {Tornow} and Jan {Odstrčilík} and Radim {Kolář}", title="A multi-color video-ophthalmoscopes allows to measure the spectral distribution of light absorption of blood in the human retina", journal="Frontiers in Medicine", year="2023", volume="10", number="1", pages="1--6", doi="10.3389/fmed.2023.1125154", issn="2296-858X", url="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10060599/pdf/fmed-10-1125154.pdf" }