Zobrazeno 1 - 10
of 161
pro vyhledávání: '"D T Delpy"'
Autor:
Terence S. Leung, Martin Tisdall, Chris E. Cooper, Martin D. Smith, D. T. Delpy, Clare E. Elwell, Ilias Tachtsidis
Publikováno v:
Physiological Measurement. 28:199-211
We have previously used a continuous four-wavelength near-infrared spectrometer to measure changes in the cerebral concentrations of oxy-haemoglobin (Delta[HbO(2)] and deoxy-haemoglobin (Delta[HHb]) during head-up tilt in patients with primary autono
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::032aa370321698e384736043372463a8
https://doi.org/10.1088/0967-3334/28/2/008
https://doi.org/10.1088/0967-3334/28/2/008
Autor:
R. Md. Yusof, Jeremy C. Hebden, JH Meek, Topun Austin, JS Wyatt, Adam Gibson, G Branco, D. T. Delpy, Simon R. Arridge
Publikováno v:
NeuroImage. 31:1426-1433
Optical methods provide a means of monitoring cerebral oxygenation in newborn infants at risk of brain injury. A 32-channel optical imaging system has been developed with the aim of reconstructing three-dimensional images of regional blood volume and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::123f145a2fc1809c3426500e55799b44
https://doi.org/10.1016/j.neuroimage.2006.02.038
https://doi.org/10.1016/j.neuroimage.2006.02.038
Publikováno v:
Physics in Medicine and Biology. 50:4409-4428
Pulsed photoacoustic spectroscopy was used to measure blood oxygen saturation in vitro. An optical parametric oscillator laser system provided nanosecond excitation pulses over the wavelength range 740-1040 nm which were used to generate photoacousti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a6a2214fe792b01306932f7a6dd0d77
https://doi.org/10.1088/0031-9155/50/18/011
https://doi.org/10.1088/0031-9155/50/18/011
Publikováno v:
Physics in Medicine and Biology, Vol. 49, No 24 (2004) pp. 5445-5458
This study reports the derivation of a precise mathematical relationship existing between the different p-moments of the power spectrum of the photoelectric current, obtained from a laser-Doppler flowmeter (LDF), and the red blood cell speed. The mai
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::17d335b6f30f1f4d55f262f0d220ec1a
https://doi.org/10.1088/0031-9155/49/24/004
https://doi.org/10.1088/0031-9155/49/24/004
Publikováno v:
Physics in Medicine and Biology. 46:2209-2225
Indocyanine green (ICG) is a near-infrared dye that has the potential to be used as a tracer for the minimally invasive measurement of cerebral blood flow (CBF). In order to examine the technique, the arterial and cerebral concentrations of ICG were
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::09be702f68cfaedd573bfef834246608
https://doi.org/10.1088/0031-9155/46/8/312
https://doi.org/10.1088/0031-9155/46/8/312
Publikováno v:
American Journal of Physiology-Heart and Circulatory Physiology. 279:H2202-H2209
Oxidation changes of the copper A (CuA) center of cytochrome oxidase in the brain were measured during brief anoxic swings at both normocapnia and hypercapnia (arterial Pco2≈55 mmHg). Hypercapnia increased total hemoglobin from 37.5 ± 9.1 to 50.8
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::992593f79911e948465b29607c8d6e17
https://doi.org/10.1152/ajpheart.2000.279.5.h2202
https://doi.org/10.1152/ajpheart.2000.279.5.h2202
Autor:
Mark Cope, Clare E. Elwell, Chris E. Cooper, JH Meek, Stephen J. Matcher, D. T. Delpy, JS Wyatt
Publikováno v:
Pediatric Research. 39:32-38
We have used second differential near infrared spectroscopy of water to determine the mean optical path length of the neonatal brain. By obtaining the ratio of the second differential features of deoxyhemoglobin to those of water, the absolute cerebr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d799a6b18e3f53f75f27af384f2125b7
https://doi.org/10.1203/00006450-199601000-00005
https://doi.org/10.1203/00006450-199601000-00005
Publikováno v:
Medical Physics. 22:1779-1792
This paper extends our work on applying the Finite Element Method (FEM) to the propagation of light in tissue. We address herein the topics of boundary conditions and source specification for this method. We demonstrate that a variety of boundary con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7fec233725f7b598325e5cf6976395df
https://doi.org/10.1118/1.597634
https://doi.org/10.1118/1.597634
Publikováno v:
Physics in Medicine and Biology. 40:295-304
We have used an intensity modulated optical spectrometer, which measures the phase shift across tissue experienced by intensity modulated near-infrared light, to determine the absolute optical pathlength through tissue. The instrument is portable and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e6c208563d0146b3b65053b72cab6a5
https://doi.org/10.1088/0031-9155/40/2/007
https://doi.org/10.1088/0031-9155/40/2/007
Publikováno v:
Journal of biomedical optics. 1(4)
This Special Section Guest Editorial provides an overview of the topical area and an introduction to the articles featured in the special section.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::e351cbb9b6e8dd447d005c722492eff1
https://pubmed.ncbi.nlm.nih.gov/23014778
https://pubmed.ncbi.nlm.nih.gov/23014778