Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Nishanth Krishnamurthy"'
Publikováno v:
PLoS ONE, Vol 14, Iss 2, p e0211710 (2019)
We report a study on twenty-two healthy human subjects of the dynamic relationship between cerebral hemoglobin concentration ([HbT]), measured with near-infrared spectroscopy (NIRS) in the prefrontal cortex, and systemic arterial blood pressure (ABP)
Externí odkaz:
https://doaj.org/article/77f47ef906c047c1b6217f79840ced66
Autor:
Xinrong Ren, Winston T. Luke, Paul Kelley, Mark Cohen, Fong Ngan, Richard Artz, Jake Walker, Steve Brooks, Christopher Moore, Phil Swartzendruber, Dieter Bauer, James Remeika, Anthony Hynes, Jack Dibb, John Rolison, Nishanth Krishnamurthy, William M. Landing, Arsineh Hecobian, Jeffery Shook, L. Greg Huey
Publikováno v:
Atmosphere, Vol 5, Iss 2, Pp 230-251 (2014)
During two intensive studies in summer 2010 and spring 2011, measurements of mercury species including gaseous elemental mercury (GEM), gaseous oxidized mercury (GOM), and particulate-bound mercury (PBM), trace chemical species including O3, SO2, CO,
Externí odkaz:
https://doaj.org/article/3a86c0134d084b868af16d8e7703f0e7
Publikováno v:
Photonics, Vol 6, Iss 3, p 83 (2019)
We report non-invasive, bilateral optical measurements on the forehead of five healthy human subjects, of 0.1 Hz oscillatory hemodynamics elicited either by cyclic inflation of pneumatic thigh cuffs, or by paced breathing. Optical intensity and the p
Externí odkaz:
https://doaj.org/article/0499e041d6dc4ee48cdc2d7579901a8c
Autor:
Pamela G Anderson, Jana M Kainerstorfer, Angelo Sassaroli, Nishanth Krishnamurthy, Marc J Homer, Roger A Graham, Sergio Fantini
Publikováno v:
PLoS ONE, Vol 10, Iss 3, p e0117322 (2015)
This study reports the optical characterization and quantitative oximetry of human breast cancer using spectrally-resolved images collected with a broadband, continuous-wave optical mammography instrument. On twenty-six cancer patients, we collected
Externí odkaz:
https://doaj.org/article/d4d94bcb4bca45d1a010d84df6d7342e
Autor:
Angelo Sassaroli, Shital S. Makim, Nishanth Krishnamurthy, Roger A. Graham, Sergio Fantini, Sirishma Kalli, Pamela G. Anderson
Publikováno v:
Academic Radiology. 24:1240-1255
Rationale and Objectives We present an optical mammography study that aims to develop quantitative measures of pathologic response to neoadjuvant chemotherapy (NAC) in patients with breast cancer. Such quantitative measures are based on the concentra
Publikováno v:
Optical Tomography and Spectroscopy of Tissue XIII.
Oscillations in the tissue concentrations of deoxyHemoglobin ([Hb]) and OxyHemoglobin ([HbO]) can be measured in the human brain using Near InfraRed Spectroscopy (NIRS). These oscillations may be driven by temporal dynamics of Arterial Blood Pressure
Autor:
Kosar Khaksari, Giles Blaney, Thao Pham, Nishanth Krishnamurthy, Angelo Sassaroli, Sergio Fantini
Publikováno v:
Journal of biomedical optics. 23(12)
We report a near-infrared spectroscopy (NIRS) study of coherent hemodynamic oscillations measured on the human forehead at multiple source–detector distances (1 to 4 cm). The physiological source of the coherent hemodynamics is arterial blood press
Publikováno v:
Multimodal Biomedical Imaging XIII.
Hemodynamic-based neuroimaging techniques such as functional magnetic resonance imaging (fMRI) and near-infrared spectroscopy (NIRS) sense hemoglobin concentration in cerebral tissue. The local concentration of hemoglobin, which is differentiated int
Publikováno v:
Biophotonics Congress: Biomedical Optics Congress 2018 (Microscopy/Translational/Brain/OTS).
Coherent oscillations in cerebral blood volume and mean arterial pressure were concurrently measured. Transfer function analysis was performed to characterize their relationship in terms of relative amplitude and phase at frequencies 0.04–0.20 Hz.
Autor:
Joshua Kornbluth, Kosar Khaksari, Angelo Sassaroli, Nishanth Krishnamurthy, Giles Blaney, Kristen T. Tgavalekos, Thao Pham, Sergio Fantini
Publikováno v:
Biophotonics Congress: Biomedical Optics Congress 2018 (Microscopy/Translational/Brain/OTS).
We present initial clinical measurements of coherent hemodynamics spectroscopy (CHS), a frequency-resolved characterization of the amplitude and phase of coherent cerebral hemodynamics measured with near-infrared spectroscopy (NIRS) and analyzed with