Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Stéphane R. Chamot"'
Publikováno v:
Klinische Monatsblätter für Augenheilkunde. 219:292-295
BACKGROUND: To investigate the effect of isovolumic hemodilution on the tissue oxygenation of the optic nerve head (ONH). MATERIAL AND METHODS: In 9 miniature pigs (6 - 12 kg), hemodilution was performed by replacing 100 - 140 ml of blood by an equiv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6c30a3fd40d4f82f2b787fa6be1d5b8d
https://doi.org/10.1055/s-2002-30656
https://doi.org/10.1055/s-2002-30656
Autor:
Nikolaos Pharmakakis, Armand Movaffaghy, Constantin J. Pournaras, Jean J. Katsimpris, Stéphane R. Chamot, Jean-Antoine C. Pournaras
Publikováno v:
Klinische Monatsblätter für Augenheilkunde. 218:323-326
Ziel: To investigate the relationship between velocity (Vel ch ), blood volume (Vol ch ) and blood flow (F ch ), and the mean ocular perfusion pressure (PP m ) in the foveal region, and to determine how the regulatory capacity of the choroidal circul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::263dd237de17aab34f9d21590d999862
https://doi.org/10.1055/s-2001-15890
https://doi.org/10.1055/s-2001-15890
Publikováno v:
Optics express. 18(23)
The optical properties within limited volumes of diffusive media can be probed by carrying spatially-resolved measurements of diffused light at short source-detector separation (typically one scattering mean free path). At such distance, analytical m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f85e4806da85595e1a6b6cb5b0ebe4f2
https://pubmed.ncbi.nlm.nih.gov/21164711
https://pubmed.ncbi.nlm.nih.gov/21164711
Autor:
T. Stepinac, Hubert van den Bergh, E Rungger-Brändle, Stéphane R. Chamot, Claude E. Riva, Constantin J. Pournaras, Georges Wagnières, Pierre W. Ferrez, Jean-Luc Munoz
Publikováno v:
Investigative ophthalmologyvisual science. 46(3)
The phosphorescence lifetime of certain metalloporphyrins dissolved in a physiological medium provides an optical signature for local oxygen concentration (pO(2)). This effect is used for measuring physiological pO(2) levels in various tissues. Howev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::175acbfba9eed717b5085c5b66ef79e8
https://pubmed.ncbi.nlm.nih.gov/15728553
https://pubmed.ncbi.nlm.nih.gov/15728553
Publikováno v:
Klinische Monatsblatter fur Augenheilkunde. 221(5)
Background: Visual stimulation is increasingly used to investigate the coupling between neuronal activity, blood flow and metabolism in the neural tissue of the ocular fundus. In an attempt to clarify whether the oxygen metabolism is involved in this
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::728f7b93a0ea34ac3d5832ec53e30534
https://pubmed.ncbi.nlm.nih.gov/15162281
https://pubmed.ncbi.nlm.nih.gov/15162281
Autor:
Constantin J. Pournaras, Stéphane R. Chamot, Jörg Sommerhalder, André Dosso, Charles E. Riva, Armand Movaffaghy
Publikováno v:
Klinische Monatsblatter fur Augenheilkunde. 219(4)
Background: In healthy subjects, choroidal blood flow is regulated when the mean ocular perfusion pressure increases. Since capillary vascular beds are altered in diabetic patients, the regulation of choroidal blood flow could be affected by this pat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da46178afa9e2376e05208fc167863cf
https://pubmed.ncbi.nlm.nih.gov/12022023
https://pubmed.ncbi.nlm.nih.gov/12022023
Autor:
Constantin J. Pournaras, Benno L. Petrig, Stéphane R. Chamot, Christine L. Percicot, Charles E. Riva, George N. Lambrou
Publikováno v:
SPIE Proceedings.
The technique of phosphorescence quenching by O 2 (PQ) allows the non-invasive measurement of the partial pressure of oxygen in blood (pO 2 blood ). This technique and its application to the investigation of the pO 2 blood in the microvasculature of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::030fab71bf3520e06cdcdcf076bc3494
https://doi.org/10.1117/12.446498
https://doi.org/10.1117/12.446498
Application of phosphorescence quenching by O2 to the investigation of O2 delivery to ocular tissues
Autor:
Stéphane R. Chamot, Benno L. Petrig, Constantin J. Pournaras, Christine L. Percicot, George N. Lambrou, Charles E. Riva
Publikováno v:
Laser-Tissue Interactions, Therapeutic Applications, and Photodynamic Therapy.
The technique of phosphorescence quenching by O2 (PQ) allows the non-invasive measurement of the partial pressure of oxygen in blood ( pO 2 blood ). This technique and its application to the investigation of the pO 2 blood in the microvasculature of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a69f5311aa8ac5571f1b0fe0461ce0d
https://doi.org/10.1364/ecbo.2001.4433_1
https://doi.org/10.1364/ecbo.2001.4433_1
Autor:
Olivier Seydoux, Christian Depeursinge, Andreas Ettemeyer, Yves Delacrétaz, Stéphane R. Chamot
Publikováno v:
Journal of the Optical Society of America A. 29:270
A novel approach for the simulation of the field back-scattered from a rough surface is presented. It takes into account polarization and multiple scattering events on the surface, as well as diffraction effects. The validity and usefulness of this s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bc73384b485dbb2142d020644bf1c530
https://doi.org/10.1364/josaa.29.000270
https://doi.org/10.1364/josaa.29.000270
Publikováno v:
Optics Express. 14:11925
The pyramid wavefront sensor is very similar to the Fourier knife-edge test, but employs dynamic modulation to quantify the phase derivative. For circular modulation, we compare approximate geometrical optics calculations, more exact diffraction calc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8040181f15261b74b9c2f28be4257740
https://doi.org/10.1364/oe.14.011925
https://doi.org/10.1364/oe.14.011925