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DTSTAMP:20230421T213645Z
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DTSTART;TZID=America/Los_Angeles:20230419T190000
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DESCRIPTION:presented by Dr David Ress\, Baylor College of Medicine where h
 e is the Technical Director of the Center for Magnetic Resonance Imaging.\
 n\nAbstract: The human brain exhibits a close relationship between neurona
 l electrical activity and blood flow. The phenomena\, functional hyperemia
 \, is the basis for functional magnetic resonance imaging (fMRI). In parti
 cular\, a brief (~2 s) period of electrical activity evokes a stereotypica
 l fMRI response that is often called the hemodynamic response function (HR
 F). Our laboratory has developed experimental methods\, consisting of an a
 udiovisual stimulus together with a speeded task\, to evoke reliable HRFs 
 across the majority of cerebral cortex in a single\, hour-long fMRI scanni
 ng session. The resulting spatial pattern of response amplitudes is very s
 imilar across subjects. In healthy young subjects\, the temporal dynamics 
 of the HRFs vary only modestly across cortex. However\, the dynamics show 
 significant changes with aging possibly associated with cardiovascular cha
 nges. We have also developed a simple model for the HRF based on a linear 
 network approximation to the vasculature\, coupled with a 1.5D convection-
 diffusion treatment of oxygen transport. The model provides a quantitative
  interpretation of the HRF in terms of blood flow and cerebral oxygen meta
 bolism. Our goal is to utilize these experimental and modeling methods as 
 a means to diagnose various forms of brain pathology.\n\nSpeaker(s): David
  Ress\, \n\nAgenda: \npresentation: Measurements and Modeling of the Hemod
 ynamic Response in the Human Brain\n\nspeaker:\n\nDr David Ress\, Baylor C
 ollege of Medicine where he is the Technical Director of the Center for Ma
 gnetic Resonance Imaging\n\nVirtual: https://events.vtools.ieee.org/m/3534
 26
LOCATION:Virtual: https://events.vtools.ieee.org/m/353426
ORGANIZER:pawlan@ieee.org
SEQUENCE:9
SUMMARY:Measurements and Modeling of the Hemodynamic Response in the Human 
 Brain
URL;VALUE=URI:https://events.vtools.ieee.org/m/353426
X-ALT-DESC:Description: <br /><h4>presented by Dr David Ress\, Baylor Colle
 ge of Medicine where he is the Technical Director of the Center for Magnet
 ic Resonance Imaging.</h4>\n<p>Abstract:&nbsp\; The human brain exhibits a
  close relationship between neuronal electrical activity and blood flow. T
 he phenomena\, functional hyperemia\, is the basis for functional magnetic
  resonance imaging (fMRI). In particular\, a brief (~2 s) period of electr
 ical activity evokes a stereotypical fMRI response that is often called th
 e hemodynamic response function (HRF). Our laboratory has developed experi
 mental methods\, consisting of an audiovisual stimulus together with a spe
 eded task\, to evoke reliable HRFs across the majority of cerebral cortex 
 in a single\, hour-long fMRI scanning session. The resulting spatial patte
 rn of response amplitudes is very similar across subjects. In healthy youn
 g subjects\, the temporal dynamics of the HRFs vary only modestly across c
 ortex. However\, the dynamics show significant changes with aging possibly
  associated with cardiovascular changes. We have also developed a simple m
 odel for the HRF based on a linear network approximation to the vasculatur
 e\, coupled with a 1.5D convection-diffusion treatment of oxygen transport
 . The model provides a quantitative interpretation of the HRF in terms of 
 blood flow and cerebral oxygen metabolism. Our goal is to utilize these ex
 perimental and modeling methods as a means to diagnose various forms of br
 ain pathology.</p><br /><br />Agenda: <br /><p>presentation: &nbsp\;<stron
 g><span style="font-size: 18pt\;">Measurements and Modeling of the Hemodyn
 amic Response in the Human Brain</span></strong></p>\n<p>speaker:</p>\n<p>
 &nbsp\;<strong><span style="font-size: 14pt\;">Dr David Ress\, Baylor Coll
 ege of Medicine where he is the Technical Director of the Center for Magne
 tic Resonance Imaging</span></strong></p>
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