Peter A. Bandettini, Ph.D. Section on Functional Imaging Methods Laboratory of Brain and Cognition & Functional MRI Facility

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Presentation transcript:

Peter A. Bandettini, Ph.D. Section on Functional Imaging Methods Laboratory of Brain and Cognition & Functional MRI Facility Functional MRI at the NIH

Fiber Track Imaging Angiography Venography Anatomy Perfusion T1 weighted T2 weighted

MRI vs. fMRI MRIfMRI one image many images (e.g., every 2 sec for 5 mins) high resolution (1 mm or less) low resolution (1.5 to 4 mm) … Time

BOLD (Blood Oxygen Level Dependent) Contrast blood flow oxygenated-blood MR signal

Basis of BOLD Contrast red blood cells L. Pauling, C. D. Coryell, Proc.Natl. Acad. Sci. USA 22, , K.R. Thulborn, J. C. Waterton, et al., Biochim. Biophys. Acta. 714: , S. Ogawa, T. M. Lee, A. R. Kay, D. W. Tank, Proc. Natl. Acad. Sci. USA 87, , oxygenated deoxygenated Oxygenated and deoxygenated red blood cells have different magnetic properties

task BOLD Contrast Imaging

Statistical Map superimposed on anatomical MRI image ~2s Functional images Time Condition 1 Condition 2... ~ 5 min Time fMRI Signal (% change) ROI Time Course Condition Activation Statistics Region of interest (ROI)

fMRI Setup

Log Size (mm) Brain Map Column Layer Log Time (sec) NIRS Millisecond Second Minute Hour Day MEG, EEG NIRS fMRI MRI PET

P. A. Bandettini, (1999) "Functional MRI" Magnitude Latency + 2 sec - 2 sec Venogram Latency Variation… Spatial and Temporal Resolution Cheng, et al. (2001) Neuron,32: Spatial Temporal

Neuronal Activation Hemodynamics ? ? ? Measured Signal Noise ? Interpretation

“fMRI” or “functional MRI” Scopus: Articles or Reviews Published per Year

J. Illes, M. P. Kirschen, J. D. E. Gabrielli, Nature Neuroscience, 6 (3) p.205, 2001 Motor Primary Sensory Integrative Sensory Basic Cognition High-Order Cognition Emotion Type of fMRI research performed

NIMH: Peter Bandettini, Ph.D. Chris Baker, Ph.D. Karen Berman, M.D. James Blair, Ph.D. Jay Giedd, M.D. Christian Grillon, Ph.D. Wayne Drevets, M.D. Ellen Liebenluft, M.D. Alex Martin, Ph.D Husseini Manji, M.D. Andreas Meyer-Lindenberg, M.D. Mort Mishkin, Ph.D Elizabeth Murray, Ph.D Daniel Pine, M.D. Judith Rapaport, M.D. Jun Shen, Ph.D. Susan Swedo, M.D. Leslie Ungerleider, Ph.D. Daniel Weinberger, M.D. NINDS: Roscoe Brady, M.D. Leonardo Cohen, M.D. Jeff Duyn, Ph.D. Jordan Grafman, Ph.D. Mark Hallet, Ph.D. John Hallenbeck, M.D. Alan Koretsky, Ph.D. Christy Ludlow, Ph.D. Henry F. McFarland, M.D. Edward Oldfield, M.D. William Theodore, M.D. NIAAA: Daniel Hommer, M.D. NICHD: Peter Basser, Ph.D. Allen Braun, M.D. NCI: Kathy Warren, M.D. Users

fMRI Studies at the NIH.. Epilepsy Visual processing Mood disorders Learning Habituation Plasticity/Recovery Motor Function Auditory processing Attention Language Speech Stroke Social Interaction Development Aging Genetics Decision making

Comparison of two groups of normal individuals with differences in the Serotonin Transporter Gene

Uses Future Uses Understanding normal brain organization and changes -networks involved with specific tasks (low to high level processing) -changes over time (seconds to years) -correlates of behavior (response accuracy, performance changes…) Clinical research -correlates of specifically activated networks to clinical populations -presurgical mapping Complementary use for clinical diagnosis -utilization of clinical research results -prediction of pathology Clinical treatment and assessment -drug, therapy, rehabilitation, biofeedback -epileptic foci mapping -drug effects Non clinical uses -complementary use with behavioral, anatomical, other modality results -lie detection -prediction of behavior tendencies -brain/computer interface

Methodology InterpretationApplications Technology Medicine Physiology Physics Engineering Computer Science Cognitive Science Statistics Neuroscience