The Functional MRI Core Facility. MRI Scanners: June 2000 “3T-1” GE 3T November 2002 “3T-2” GE 3T September2004“FMRIF 1.5T” GE 1.5T January20073T -1 decommissioned.

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Presentation transcript:

The Functional MRI Core Facility

MRI Scanners: June 2000 “3T-1” GE 3T November 2002 “3T-2” GE 3T September2004“FMRIF 1.5T” GE 1.5T January20073T -1 decommissioned November2007“3T-A”GE 3T November2007“3T-B”GE 3T November2007“3T-2” named “3T-C” July 20073T-C upgraded to HD.

3T-B3T-C 1.5T3T-A

Staff: Peter Bandettini, Ph.D.– Director Sean Marrett, Ph.D. – Staff Scientist Jerzy Bodurka, Ph.D. – Staff Scientist Wen-Ming Luh, Ph.D. – Staff Scientist Vinai Roopchansinch, Ph.D.-Staff Scientist Adam Thomas – IT Specialist Kay Kuhns – Administrative Lab Manager Janet Ebron – Technologist Ellen Condon – Technologist Sahra Omar – Technologist Paula Rowser– Technologist Chung Kan– Technologist Debbie Tkaczyk-Technologist Sandra Moore-Technologist Marcela Montequin-Technologist

NIMH: Peter Bandettini, Ph.D. Chris Baker, Ph.D. Karen Berman, M.D. James Blair, Ph.D. Mary Kay Floeter, M.D., Ph.D. Jay Giedd, M.D. Christian Grillon, Ph.D. Wayne Drevets, M.D. Ellen Liebenluft, M.D. Alex Martin, Ph.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: 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. NICHD: Peter Basser, Ph.D. Allen Braun, M.D. NCI: Kathy Warren, M.D. Users

Services: 1.State of the art MRI technology. 2.Maintenance and support of daily MRI scanner operation. 3.Trained MRI technologist coverage during all prime time hours and most off hours and weekends. 4.Training by technologists in scanning techniques and protocols. 5.Updated scheduling and a means for exchanging scan time between users. 6.The FMRIF website ( 7.Weekly fMRI discussion groups that focus on recent research and issues. 8.State of the art subject interface devices. 9.Short and long term automatic archiving of fMRI data. 10.Consulting with users on the best fMRI scanning and processing approaches.

Summary: Inception: 1999 Current annual budget (2009): $2.21 M Personnel budget:$1.76 M Supplies, equipment and services budget:$450K* # of staff:15 # of Principle Investigators Served: 34 # of active protocols using FMRIF:60 # of subjects scanned per year:5000 *excludes maintenance contracts (rises to $890K next year when maintenance is included)

“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

What fMRI Is Currently Being Used For Research Applications -map networks involved with specific behavior, stimulus, or performance -characterize changes over time (seconds to years) -determine correlates of behavior (response accuracy, etc…) -characterization of groups or individuals Clinical Research -clinical population characterization (probe task or resting state) -assessment of recovery and plasticity -attempts to characterize (classify) individuals Clinical Applications -presurgical mapping (CPT code in place as of Jan, 2007)

Methodology InterpretationApplications Technology Coil arrays High field strength High resolution Novel functional contrast Functional Connectivity Assessment Multi-modal integration Pattern classification Real time feedback Task design (fMRIa…) Fluctuations Dynamics Spatial patterns Basic Neuroscience Behavior correlation/prediction Pathology assessment

7 T 3 T - C 11.7 T

The Challenge Regarding the New 7 T To create a robust, user-friendly system (Staff of physicists who have benefited from the experience of Jeff Duyn’s group) Field inhomogeneities are greater (and vary more over space and time) RF power is higher (limits certain sequences) RF penetration is less homogeneous (inhomogeneous images) T2* is shorter (less time for DTI, multi-echo, high res) T1 is longer (have to go to longer TR) Fluctuations are greater

Why High Field? Increased SNR Increased functional and anatomical contrast New contrasts Higher resolution Shorter scan times (wider range of patients and studies) Better sensitivity to fluctuations (i.e. connectivity) More information from individuals (rather than group averaging)

TSE, 11 echoes, 7 min exam, 20cm FOV, 512x512 (0.4mm x 0.4mm), 3mm thick slices. white matter SNR = 65white matter SNR = 26 Gray matter SNR = 76Gray matter SNR = 34 Courtesy of L. Wald, MGH, Boston 7T3T Higher SNR

Duyn et al. PNAS, 2007 Novel Contrast

Scalebar = 0.5 mm Orientation Columns in Human V1 as Revealed by fMRI at 7T Phase 0°0°0°0° 180° Phase Map Yacoub, et al. PNAS, 2008

J. Bodurka, F. Ye, N Petridou, K. Murphy, P. A. Bandettini, NeuroImage, 34, (2007) Temporal Signal to Noise Ratio (TSNR) vs. Signal to Noise Ratio (SNR) 3T, birdcage: 2.5 mm 3 3T, 16 channel:1.8 mm 3 7T, 16 channel:1.4 mm 3

K. Murphy, J. Bodurka, P. A. Bandettini, How long to scan? The relationship between fMRI temporal signal to noise and the necessary scan duration. NeuroImage, 34, (2007) Scanning Individuals

Multi-sensory integration Visual Auditory Multisensory M.S. Beauchamp et al.,

Object categories are associated with distributed representations in ventral temporal cortex Haxby et al. 2001

Boynton (2005), News & Views on Kamitani & Tong (2005) and Haynes & Rees (2005)

Kamitani & Tong (2005) Lower spatial frequency clumping

From fixed ROI Pattern Information Mapping N. Kriegeskorte, E. Formisano, B. Sorger, R. Goebel, Proc. Nat'l. Acad. Sci. USA, 104, (2007)

response patterns stimuli... ROI in Brain dissimilarity matrix compute dissimilarity (1-correlation across space) 96 Dissimilarity Matrix Creation N. Kriegeskorte, et al, Neuron, 60, (2008)

Visual Stimuli

Human IT (1000 visually most responsive voxels) Human Early Visual Cortex (1057 visually most responsive voxels)

average of 4 subjects fixation-color task 316 voxels average of 2 monkeys fixation task >600 cells

Resting state networks identified with ICA M. DeLuca, C.F. Beckmann, N. De Stefano, P.M. Matthews, S.M. Smith, fMRI resting state networks define distinct modes of long-distance interactions in the human brain. NeuroImage, 29,

Real time fMRI feedback to reduce chronic pain Control over brain activation and pain learned by using real-time functional MRI, R. C. deCharms, et al. PNAS, 102; (2005)