Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Steven Chalfin"'
Publikováno v:
Health Physics. 120:525-531
This study examines the nonuniform exposure to the cornea from incident millimeter waves at 94-100 GHz. Two previous studies measured temperature increases in the rhesus cornea exposed to brief (1-6 s) pulses of high-fluence millimeter waves (94 GHz)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d43e987c0f60ff1146ba620c0a9fce7e
https://doi.org/10.1097/hp.0000000000001376
https://doi.org/10.1097/hp.0000000000001376
Publikováno v:
Journal of Glaucoma. 26:173-181
PURPOSE OF THE STUDY The purpose of the study was to evaluate neurodegeneration along brain visual pathways in primary open angle glaucoma (POAG) using improved analysis methods of volumetric and diffusion tensor magnetic resonance imaging (MRI) data
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c04769edf12653cf6d4fbff05b3cd067
https://doi.org/10.1097/ijg.0000000000000558
https://doi.org/10.1097/ijg.0000000000000558
Autor:
Pavel Rodriguez, Wei Zhou, Timothy Q. Duong, Kundandeep S. Nagi, Steven Chalfin, Eric R. Muir
Publikováno v:
Journal of glaucoma. 26(5)
PURPOSE To investigate retinotopic functional representation in the visual cortex of mild to moderate primary open-angle glaucoma (POAG) participants and age-matched normal volunteers using high-resolution retinotopic blood oxygenation level dependen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac2f420054541de4685ca68d640d7882
https://pubmed.ncbi.nlm.nih.gov/28221328
https://pubmed.ncbi.nlm.nih.gov/28221328
Autor:
Jeffrey W. Kiel, Qi Peng, Daniel A. Johnson, Oscar San Emeterio Nateras, Joseph M. Harrison, Steven Chalfin, Timothy Q. Duong, Yi Zhang, Juan E. Gutierrez, Eric R. Muir
Publikováno v:
Current Eye Research. 39:1059-1067
Purpose: To verify that a visual fixation protocol with cued eye blinks achieves sufficient stability for magnetic resonance imaging (MRI) blood-flow measurements and to determine if choroidal blood flow (ChBF) changes with age in humans. Methods: Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::06a9bbe328dac39224cb3315c64832c2
https://doi.org/10.3109/02713683.2014.892997
https://doi.org/10.3109/02713683.2014.892997
SU-F-I-18: Altered Visual Cortex Responses by Wide-View FMRI in Primary Open Angle Glaucoma Patients
Publikováno v:
Medical Physics. 43:3390-3390
Purpose: Primary open-angle glaucoma (POAG) is a common ocular disorder with progressive retinal ganglion cell loss. This study explored the application of wide view fMRI to evaluate neural activity of the whole visual cortex and its relation with vi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cad1f9f5a75467f8664467629e3df919
https://doi.org/10.1118/1.4955846
https://doi.org/10.1118/1.4955846
Publikováno v:
Documenta ophthalmologica. Advances in ophthalmology. 126(3)
To evaluate retinal and choroidal blood flow (BF) using high-resolution magnetic resonance imaging (MRI) as well as visual function measured by the electroretinogram (ERG) in patients with retinitis pigmentosa (RP). MRI studies were performed in 6 RP
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::51c863e3d3394734019c60f811437af5
https://pubmed.ncbi.nlm.nih.gov/23408312
https://pubmed.ncbi.nlm.nih.gov/23408312
Autor:
Shin Tsu Lu, Carrie Crane, Donald Marchello, Robert Garay, John M. Ziriax, Donald J. Hatcher, Steven Chalfin, John A. D'Andrea
Publikováno v:
Bioelectromagnetics.
Microwave-induced corneal endothelial damage was reported to have a low threshold (2.6 W/kg), and vasoactive ophthalmologic medications lowered the threshold by a factor of 10–0.26 W/kg. In an attempt to confirm these observations, four adult male
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::54a69bd4ec7ca5b9bb27b27579887e20
https://doi.org/10.1002/bem.20556
https://doi.org/10.1002/bem.20556
Publikováno v:
Health physics. 84(6)
Recent data on damage to the primate cornea from exposure to millimeter wave radiation are interpreted in terms of a simple thermal model. The measured temperature increases during the exposures (duration 1-5 s, 35 or 94 GHz, 2-7 W cm(-2)) agree with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ee7106e92ce550c2416c18fe6b68068
https://pubmed.ncbi.nlm.nih.gov/12822586
https://pubmed.ncbi.nlm.nih.gov/12822586
Publikováno v:
Health physics. 83(1)
The purpose of this study was to evaluate anterior segment bioeffects of pulsed 35 GHz and 94 GHz microwave exposure in the nonhuman primate eye. Five juvenile rhesus monkeys (Macaca mulatta) underwent baseline anterior segment ocular assessment cons
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e83c7d30338a58429764cad34ea67843
https://pubmed.ncbi.nlm.nih.gov/12075687
https://pubmed.ncbi.nlm.nih.gov/12075687
Autor:
Gurpreet Singh, Steven Chalfin
Publikováno v:
American journal of ophthalmology. 130(4)
PURPOSE: To report a patient who developed complications from an experimental technique using scleral expansion to treat presbyopia. METHODS: Case report of a 46-year-old woman who underwent scleral expansion surgery on her right eye. Postoperatively
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ae2850e9dfe40c2136d41a0c4c674c9f
https://pubmed.ncbi.nlm.nih.gov/11024428
https://pubmed.ncbi.nlm.nih.gov/11024428