Perfusion fMRI - Center for Functional MRI

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Controlling <strong>for</strong> Transit Delays in CASL Tagging Plane A B A B time Voxels A and B have the same CBF, but voxel B will appear to have lower CBF if the measurement is made too early.
Arterial Bolus Width CASL Baseline Global flow increase Temporal Width of bolus determined by the pulse sequence PASL Baseline Global flow increase time Temporal Width of bolus determined by arterial velocity and size of tagging slab. Underestimates global flow changes.
Page 1 and 2: Perfusion fMRI Thomas Liu Center fo
Page 3 and 4: Cerebral Blood Flow (CBF) CBF = Per
Page 5 and 6: High CBF Low CBF Time
Page 7 and 8: Methods for Tagging Arterial Blood
Page 9 and 10: Arterial Spin Labeling (ASL) • wa
Page 11 and 12: Continuous ASL Imaging Plane Invers
Page 13 and 14: Multislice CASL and PICORE CASL PIC
Page 16: Major Sources of Error for ASL •
Page 22 and 23: Velocity Selective ASL •Velocity
Page 24 and 25: Ideal Velocity Selective ASL 1 Cont
Page 26 and 27: Initial Implementation (2002) 90 x
Page 28 and 29: Results - VENC Dependence VENC (cm/
Page 30 and 31: Future Development of VS-ASL • Be
Page 32 and 33: Pairwise subtraction example Contro
Page 34 and 35: ASL Data Processing • BOLD = aver
Page 36 and 37: Simultaneous Flow and BOLD with PAS
Page 38 and 39: Event-related ASL • ASL time seri
Page 40 and 41: Results Direct Running Subtraction
Page 42 and 43: Non-quantitative ASL • ASL signal
Page 44 and 45: Finger Tapping PICORE Turbo PICORE
Page 46 and 47: Amplifying Transit Delays Effects i
Page 48 and 49: Close Tag CASL Subject 1 Subject 2
Page 50 and 51: CBF and BOLD with Eyes Open/Closed
Page 52 and 53: ASL Mapping of Cortical Columns in
Page 54 and 55: Overview of BOLD Mechanisms Neurona
Page 56 and 57: Conclusions • ASL provides a non-

Perfusion fMRI - Center for Functional MRI

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