Research Topics
| Theodore J HuppertSummaryAffiliation: University of Pittsburgh Country: USA Publications
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Detail Information
Publications
Direct estimation of evoked hemoglobin changes by multimodality fusion imagingTheodore J Huppert
The Massachusetts General Hospital, Athinoula A Martinos Center for Biomedical Imaging, Charlestown, Massachusetts 02129, USA
J Biomed Opt 13:054031. 2008..Using this multimodal method, we estimate the calibration of the 3 tesla BOLD signal to be -0.55%+/-0.40% signal change per micromolar change of deoxyhemoglobin...
Sensitivity of neural-hemodynamic coupling to alterations in cerebral blood flow during hypercapniaTheodore J Huppert
University of Pittsburgh, Department of Radiology, 200 Lothrop Street, Pittsburgh, Pennsylvania 15213, USA
J Biomed Opt 14:044038. 2009..We conclude that evoked changes in blood flow and cerebral oxygen metabolism are more closely associated with underlying evoked neuronal responses...
HomER: a review of time-series analysis methods for near-infrared spectroscopy of the brainTheodore J Huppert
Departments of Radiology and Bioengineering, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania 15213, USA
Appl Opt 48:D280-98. 2009..These methods are described within the context of the MATLAB-based graphical user interface program, HomER, which we have developed and distributed to facilitate the processing of optical functional brain data...
Estimating cerebral oxygen metabolism from fMRI with a dynamic multicompartment Windkessel modelTheodore J Huppert
Department of Radiology, University of Pittsburgh, UPMC Presbyterian, 200 Lothrop St, Pittsburgh, PA 15213, USA
Hum Brain Mapp 30:1548-67. 2009....
Near-infrared spectroscopy measurement of the pulsatile component of cerebral blood flow and volume from arterial oscillationsGeorge Themelis
Massachusetts General Hospital, Athinoula A Martinos Center for Biomedical Imaging, Department of Radiology, Charlestown, Massachusetts 02129, USA
J Biomed Opt 12:014033. 2007..Preliminary results show the potential of this NIRS method to measure pCBF and pCBV relative changes in neonatal pigs...
A vascular anatomical network model of the spatio-temporal response to brain activationDavid A Boas
Athinoula A Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
Neuroimage 40:1116-29. 2008....
Quantitative spatial comparison of diffuse optical imaging with blood oxygen level-dependent and arterial spin labeling-based functional magnetic resonance imagingTheodore J Huppert
Massachusetts General Hospital, Athinoula A Martinos Center for Biomedical Imaging, Charlestown, Massachusetts 02129, USA
J Biomed Opt 11:064018. 2006..73, p=5x10(-6) and R=0.71, p=9x10(-6), respectively) than the flow to deoxyhemoglobin spatial correlation (R=0.26, p=0.10)...
Physiological system identification with the Kalman filter in diffuse optical tomographySolomon Gilbert Diamond
Massachusetts General Hospital, Martinos Center for Biomedical Imaging, Charlestown, MA 02129, USA
Med Image Comput Comput Assist Interv 8:649-56. 2005..Cardiovascular dynamics also affect the blood oxygen dependent (BOLD) signal in functional magnetic resonance imaging (fMRI). This Kalman filter framework for DOT may be adapted for BOLD fMRI analysis and multimodal studies...
Diffuse optical imaging of the whole headMaria Angela Franceschini
Massachusetts General Hospital, Athinoula A Martinos Center for Biomedical Imaging, 13th Street, Bldg 149 RM 2301, Charlestown, Massachusetts 02129, USA
J Biomed Opt 11:054007. 2006....
Calibrating the BOLD signal during a motor task using an extended fusion model incorporating DOT, BOLD and ASL dataMeryem A Yucel
Athinoula A Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
Neuroimage 61:1268-76. 2012..Our method yields an independent measurement of M, which provides an alternative measurement to validate the hypercapnic calibration of the BOLD signal...
Diffuse optical tomography system to image brain activation with improved spatial resolution and validation with functional magnetic resonance imagingDanny K Joseph
Athinoula A Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, MA 02129, USA
Appl Opt 45:8142-51. 2006..Experimental results showing the application of this instrument for imaging human brain activation are also presented. The observed improvement in spatial resolution is confirmed by functional magnetic resonance imaging...
Dynamic physiological modeling for functional diffuse optical tomographySolomon Gilbert Diamond
Massachusetts General Hospital, Athinoula A Martinos Center for Biomedical Imaging, Charlestown, MA 02129, USA
Neuroimage 30:88-101. 2006..This state-space approach to DOT analysis could be extended to BOLD fMRI analysis, multimodal studies and real-time analysis...
Quantification of the cortical contribution to the NIRS signal over the motor cortex using concurrent NIRS-fMRI measurementsLouis Gagnon
Athinoula A Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
Neuroimage 59:3933-40. 2012..While different stimuli will result in different pial vein contributions, our finger tapping results do reveal the importance of considering the pial contribution...
A multicompartment vascular model for inferring baseline and functional changes in cerebral oxygen metabolism and arterial dilationTheodore J Huppert
Athinoula A Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, Massachusetts, USA
J Cereb Blood Flow Metab 27:1262-79. 2007..Finally, we compare this model to earlier work and find that the multicompartment model more accurately describes the observed oxygenation changes when compared with a single compartment version...
