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Papers by Harry L Graber

Research paper thumbnail of Endurance Exercise Enhances Emotional Valence and Emotion Regulation

Frontiers in human neuroscience, 2018

Acute exercise consistently benefits both emotion and cognition, particularly cognitive control. ... more Acute exercise consistently benefits both emotion and cognition, particularly cognitive control. We evaluated acute endurance exercise influences on emotion, domain-general cognitive control and the cognitive control of emotion, specifically cognitive reappraisal. Thirty-six endurance runners, defined as running at least 30 miles per week with one weekly run of at least 9 miles (21 female, age 18-30 years) participated. In a repeated measures design, participants walked at 57% age-adjusted maximum heart rate (HR; range 51%-63%) and ran at 70% HR (range 64%-76%) for 90 min on two separate days. Participants completed measures of emotional state and the Stroop test of domain-general cognitive control before, every 30 min during and 30 min after exercise. Participants also completed a cognitive reappraisal task (CRT) after exercise. Functional near-infrared spectroscopy (fNIRS) tracked changes in oxygenated and deoxygenated hemoglobin (OHb and dHb) levels in the prefrontal cortex (PFC)...

Research paper thumbnail of Imaging of spatiotemporal coincident states by DC optical tomography

Ieee Transactions on Medical Imaging, Aug 1, 2002

Research paper thumbnail of A perturbation approach for optical di usion tomography using continuous-wave and time-resolved data

Research paper thumbnail of Luminescence Diffusion Tomography

Research paper thumbnail of Dynamic functional imaging of the healthy and cancerous breast by optical tomography

Research paper thumbnail of Instrumentation calibration protocol

Research paper thumbnail of Spatial dependence of the time-frequency response of hemoglobin states in the resting human forearm

Research paper thumbnail of Quantification and enhancement of image reconstruction accuracy by frequency encoding of spatial information

Research paper thumbnail of Cerebral oximetry in cardiac surgery: Exploration of regional variability

J Amer Coll Surgeons, 2011

Research paper thumbnail of Image enhancement by spatial linear deconvolution

Research paper thumbnail of Optical imaging of anatomical maps derived from magnetic resonance images using time-independent optical sources

Ieee Transactions on Medical Imaging, 1997

Research paper thumbnail of A real-time system for dynamic optical tomography

Research paper thumbnail of Transient-Artifact Reduction Algorithm (TARA) Based on Sparse Optimization

Ieee Transactions on Signal Processing, Dec 1, 2014

Research paper thumbnail of Method and system for enhancing solutions to a system of linear equations

Research paper thumbnail of Normalized-Constraint Algorithm for Minimizing Inter-Parameter Crosstalk in Imaging of Scattering Media

Research paper thumbnail of On the geometry dependence of differential pathlength factor for near-infrared spectroscopy. I. Steady-state with homogeneous medium

Journal of biomedical optics, 2015

This work analytically examines some dependences of the differential pathlength factor (DPF) for ... more This work analytically examines some dependences of the differential pathlength factor (DPF) for steady-state photon diffusion in a homogeneous medium on the shape, dimension, and absorption and reduced scattering coefficients of the medium. The medium geometries considered include a semi-infinite geometry, an infinite-length cylinder evaluated along the azimuthal direction, and a sphere. Steady-state photon fluence rate in the cylinder and sphere geometries is represented by a form involving the physical source, its image with respect to the associated extrapolated half-plane, and a radius-dependent term, leading to simplified formula for estimating the DPFs. With the source-detector distance and medium optical properties held fixed across all three geometries, and equal radii for the cylinder and sphere, the DPF is the greatest in the semi-infinite and the smallest in the sphere geometry. When compared to the results from finite-element method, the DPFs analytically estimated for ...

Research paper thumbnail of Enhanced resting-state dynamics of the hemoglobin signal as a novel biomarker for detection of breast cancer

Research paper thumbnail of Greater Variability of Cerebral Vascular Autoregulation in Traumatic Brain Injury During a Working Memory Task

Research paper thumbnail of Improved Quality of Scattering-Coefficient Images via Linear Spatial Deconvolution in Dynamic Diffuse Optical Tomography

Research paper thumbnail of Phenotype-Motivated Strategies for Optical Detection of Breast Cancer

Optical breast imaging studies show that controlled pressure maneuvers improve contrast between t... more Optical breast imaging studies show that controlled pressure maneuvers improve contrast between tumors and both the surrounding healthy tissue and the contralateral breast. The accuracy of tumor localization and sizing was consequently improved.

Research paper thumbnail of Endurance Exercise Enhances Emotional Valence and Emotion Regulation

Frontiers in human neuroscience, 2018

Acute exercise consistently benefits both emotion and cognition, particularly cognitive control. ... more Acute exercise consistently benefits both emotion and cognition, particularly cognitive control. We evaluated acute endurance exercise influences on emotion, domain-general cognitive control and the cognitive control of emotion, specifically cognitive reappraisal. Thirty-six endurance runners, defined as running at least 30 miles per week with one weekly run of at least 9 miles (21 female, age 18-30 years) participated. In a repeated measures design, participants walked at 57% age-adjusted maximum heart rate (HR; range 51%-63%) and ran at 70% HR (range 64%-76%) for 90 min on two separate days. Participants completed measures of emotional state and the Stroop test of domain-general cognitive control before, every 30 min during and 30 min after exercise. Participants also completed a cognitive reappraisal task (CRT) after exercise. Functional near-infrared spectroscopy (fNIRS) tracked changes in oxygenated and deoxygenated hemoglobin (OHb and dHb) levels in the prefrontal cortex (PFC)...

Research paper thumbnail of Imaging of spatiotemporal coincident states by DC optical tomography

Ieee Transactions on Medical Imaging, Aug 1, 2002

Research paper thumbnail of A perturbation approach for optical di usion tomography using continuous-wave and time-resolved data

Research paper thumbnail of Luminescence Diffusion Tomography

Research paper thumbnail of Dynamic functional imaging of the healthy and cancerous breast by optical tomography

Research paper thumbnail of Instrumentation calibration protocol

Research paper thumbnail of Spatial dependence of the time-frequency response of hemoglobin states in the resting human forearm

Research paper thumbnail of Quantification and enhancement of image reconstruction accuracy by frequency encoding of spatial information

Research paper thumbnail of Cerebral oximetry in cardiac surgery: Exploration of regional variability

J Amer Coll Surgeons, 2011

Research paper thumbnail of Image enhancement by spatial linear deconvolution

Research paper thumbnail of Optical imaging of anatomical maps derived from magnetic resonance images using time-independent optical sources

Ieee Transactions on Medical Imaging, 1997

Research paper thumbnail of A real-time system for dynamic optical tomography

Research paper thumbnail of Transient-Artifact Reduction Algorithm (TARA) Based on Sparse Optimization

Ieee Transactions on Signal Processing, Dec 1, 2014

Research paper thumbnail of Method and system for enhancing solutions to a system of linear equations

Research paper thumbnail of Normalized-Constraint Algorithm for Minimizing Inter-Parameter Crosstalk in Imaging of Scattering Media

Research paper thumbnail of On the geometry dependence of differential pathlength factor for near-infrared spectroscopy. I. Steady-state with homogeneous medium

Journal of biomedical optics, 2015

This work analytically examines some dependences of the differential pathlength factor (DPF) for ... more This work analytically examines some dependences of the differential pathlength factor (DPF) for steady-state photon diffusion in a homogeneous medium on the shape, dimension, and absorption and reduced scattering coefficients of the medium. The medium geometries considered include a semi-infinite geometry, an infinite-length cylinder evaluated along the azimuthal direction, and a sphere. Steady-state photon fluence rate in the cylinder and sphere geometries is represented by a form involving the physical source, its image with respect to the associated extrapolated half-plane, and a radius-dependent term, leading to simplified formula for estimating the DPFs. With the source-detector distance and medium optical properties held fixed across all three geometries, and equal radii for the cylinder and sphere, the DPF is the greatest in the semi-infinite and the smallest in the sphere geometry. When compared to the results from finite-element method, the DPFs analytically estimated for ...

Research paper thumbnail of Enhanced resting-state dynamics of the hemoglobin signal as a novel biomarker for detection of breast cancer

Research paper thumbnail of Greater Variability of Cerebral Vascular Autoregulation in Traumatic Brain Injury During a Working Memory Task

Research paper thumbnail of Improved Quality of Scattering-Coefficient Images via Linear Spatial Deconvolution in Dynamic Diffuse Optical Tomography

Research paper thumbnail of Phenotype-Motivated Strategies for Optical Detection of Breast Cancer

Optical breast imaging studies show that controlled pressure maneuvers improve contrast between t... more Optical breast imaging studies show that controlled pressure maneuvers improve contrast between tumors and both the surrounding healthy tissue and the contralateral breast. The accuracy of tumor localization and sizing was consequently improved.

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