Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Gwen Lech"'
Autor:
Gwen Lech
Publikováno v:
Journal of Innovative Optical Health Sciences. :373-383
This article presents a historical perspective of foundational studies utilizing near-infrared spectroscopy (NIRS) to measure the hemodynamics, oxygenation, and activation of the human brain cortex during cognitive tasks, called functional NIRS (fNIR
Autor:
J. Bruce Kneeland, Arijitt Borthakur, Sarma V.S. Akella, Andrew J. Wheaton, Gwen Lech, Ravinder R. Regatte, Ravinder Reddy
Publikováno v:
Academic Radiology. 11:741-749
Rationale and objectives To determine the in vivo feasibility of quantifying early degenerative changes in patellofemoral joint of symptomatic human knee using spin-lattice relaxation time in the rotating frame (T 1ρ ) magnetic resonance imaging (MR
Publikováno v:
Review of Scientific Instruments. 73:3065-3074
This article focuses on optimizing the signal to noise ratio (SNR) of a three-wavelength light-emitting diode (LED) near-infrared continuous-wave (cw) imager and its application to in vivo muscle metabolism measurement. The shot-noise limited SNR is
Publikováno v:
Diabetes care. 29(8)
OBJECTIVE—Diabetes is a significant risk factor for peripheral arterial disease (PAD) and is associated with accelerated atherosclerosis and limb loss. However, the pathophysiology involved in PAD is unclear. This study was conducted to evaluate th
Publikováno v:
Scopus-Elsevier
Near-infrared diffuse optical spectroscopies were used to measure noninvasively the dynamics of muscle blood flow, blood oxygenation, and oxygen consumption for evaluation of microcirculation and tissue metabolism in the patients with peripheral arte
Autor:
Arjun G. Yodh, Guoqiang Yu, Emile R. Mohler, Britton Chance, Gwen Lech, Turgut Durduran, Chao Zhou
Publikováno v:
Journal of biomedical optics. 10(2)
We have employed near-infrared optical methods to mea- sure noninvasively the dynamics of muscle blood flow and oxygen saturation (StO2) during cuff occlusion and plantar flexion exercise. Relative muscle oxygen consumption (rVO2) was also computed f
Autor:
Ravinder Reddy, Regatte, Sarma V S, Akella, Andrew J, Wheaton, Gwen, Lech, Arijitt, Borthakur, J Bruce, Kneeland, Ravinder, Reddy
Publikováno v:
Academic radiology. 11(7)
To determine the in vivo feasibility of quantifying early degenerative changes in patellofemoral joint of symptomatic human knee using spin-lattice relaxation time in the rotating frame (T(1rho)) magnetic resonance imaging (MRI).All the MRI experimen
Publikováno v:
Biomedical Topical Meeting.
Two near-infrared diffuse spectroscopies were used to simultaneously measure the blood flow and oxygenation in human skeletal muscles. The hemodynamics of nine healthy-volunteers and one PVD-patient during arterial cuff-occlusion and plantar-flexion
Publikováno v:
SPIE Proceedings.
A hybrid instrument combining near infrared and diffuse correlation spectroscopies was used to measure muscle oxygenation and blood flow dynamics during cuff occlusion and ischemia. Measurements were done on six healthy subjects on their arm and leg
Autor:
Daisuke Furuya, Arjun G. Yodh, Joel H. Greenberg, Chao Zhou, Britten Chance, Gwen Lech, Turgut Durduran, Guoqiang Yu
Publikováno v:
SPIE Proceedings.
Measurement of concentration, oxygenation, and flow characteristics of blood cells can reveal information about tissue metabolism and functional heterogeneity. An improved multifunctional hybrid system has been built on the basis of our previous hybr