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HST.583 Functional Magnetic Resonance Imaging: Data Acquisition and Analysis
Fall 2008
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HST.583: Functional Magnetic Resonance Imaging: Data Acquisition and Analysis, Fall 2008
Harvard-MIT Division of Health Sciences and Technology
Course Director: Dr. Randy Gollub.
2. T1, T2 and T2* Measurements
Background
To calculate T1 values of the tissue we will be using an inversion recovery turbo spin
echo sequence. We will be sampling the magnetization as a function of the inversion time
(TI). The observed signal intensity is given by the following equation:
S(t) ∝ [1 − 2 exp(−TI / T1)]
(1)
To obtain the transverse relaxation time, T2, values in the brain a series of spin echo
images will be acquired by stepping through a range of TEs. The image intensity is given
by the following equation:
S(t) ∝ exp(−TE / T 2)
(2)
T2star (T2*) is the time constant that describes the decay of the transverse magnetization
including local magnetic field inhomogeneities. T2* is an important relaxation time for
functional studies because it is related to the amount of deoxygenated hemoglobin present
in the brain. To determine the T2* values in gray, white matter and CSF, we will be using
a gradient echo sequence and the signal is described by:
S(t) ∝ exp(−TE / T 2*)
(3)
Experiments
In this exercise we will acquire and evaluate human data in order to characterize
T1, T2 and T2* values in brain tissue compartments. Various sequences will be used with
the imaging parameters manipulated so that they provide the appropriate contrast
weightings.
T1 measurements
Acqusition: Total scan time: 5m 38sec
A. Inversion Recovery Turbo Spin Echo (tse_IR) sequence with TR=3000ms,
FOV=240x240, matrix=96x128, repeated for multiple inversion times TI=200,
300, 400, 500, 600, 700, 800, 1000, 1300, 1500, 1700, 2000, 2200 ms.
1.
2.
3.
4.
Load all the images on the viewer.
Draw ROIs in gray matter areas.
Record the mean signal values in Table 1 for each inversion time and ROI.
Repeat steps 1-3 for regions of white matter and CSF.
™ Lab Question 6 : Draw the measured signal as a function of inversion
time for each of the tissue compartments. Calculate the T1 for gray, white
matter and CSF by fitting Eq. (1) to your data. Hint: you will need to use a
nonlinear fitting function such as nlinfit in matlab to accomplish this.
T2 measurements
Acqusition: Total scan time: 9m 42sec
B. SE sequence with TR=4000ms, FOV=220x220, matrix=192x192, 8 echo times in
a range between 14.3ms and 114.4ms and inter-echo spacing 14.3 ms.
5.
6.
7.
8.
Load all the images on the viewer.
Draw ROIs in gray matter areas.
Record the mean signal values in Table 2 for each echo time and ROI.
Repeat steps 1-3 for regions of white matter and CSF.
™ Lab Question 7 : Draw the measured signal as a function of echo time for
each of the tissue compartments. Calculate the T2 for gray, white matter
and CSF by fitting Eq. (2) to your data.
T2* measurements
Acqusition: Total scan time: 11sec
C. 2D FLASH sequence with TR=100msec, FOV=256x256, matrix=128x128, and
multi contrast with echo times TE=6, 10, 15, 20, 30, 50, 70, 80 msec.
9. Load all the images on the viewer.
10. Draw ROIs in gray matter areas.
11. Record the mean signal values in Table 3 for each echo time and ROI.
12. Repeat steps 1-3 for regions of white matter and CSF.
™ Lab Question 8 : Draw the measured signal as a function of echo time for
each of the tissue compartments. Calculate the T2* of gray and white
matter and CSF by fitting Eq. (3) to your data.
™ Lab Question 9 : According to your measurements how do T2 and T2*
compare for the same tissue compartment? Did you expect these findings?
Explain why.
Table 1 – T1 Measurements
TI (ms)
200
300
400
500
600
700
800
1000
1300
1500
1700
2000
2200
Gray
White
Matter
Matter
CSF
Table 2 – T2 Measurements
TE (ms)
Gray
White
Matter
Matter
CSF
14.3
28.6
42.9
57.2
71.5
85.8
100.1
114.4
Table 3 – T2* Measurements
TE (ms)
6
10
15
20
30
50
70
80
Gray
White
Matter
Matter
CSF
3. Distortion in EPI due to B0 Inhomogeneity
Background
The echo-planar image (EPI) is distorted due to local field gradients present in the head
during imaging. Since the acquisition of k-space data is very asymmetric in EPI, with the
readout direction points (kx) collected quickly and the phase encode steps (ky) relatively
slowly, the distortion is essentially entirely in the y direction (phase encode direction).
The relative distortion between the two directions can be estimated from the relative
speed of the acquisition. In kx, at a typical readout BW (say 2.2kHz/pixel or 140kHz in
frequency across the 64 pixel image), the dwell time (time between kx samples) is 7.1μs.
The ky sampling rate is slower because of the zig-zag trajectory, and is about 64 times
slower. This gives a sampling spacing of 64 * 7.1μs = 0.45ms. We call this .the "echo
spacing", (esp), of the sequence, the time between gradient echos (acquisition of the kx=0
point).
1
The effective "bandwidth" in the phase encode direction is therefore
across the
esp
image or 1/64*esp = 34.7Hz/pixel. Therefore a B0 shift which induces a 34.7Hz
frequency shift will induce a shift in this region of 1pixel. The frequency shifts in the
"bad susceptibility" regions of the brain are easily in the 100Hz range. Therefore, the
principle metric of how distorted the EPI sequence will be is its effective echo-spacing.
For conventional echo-planar imaging, this is basically limited by the gradient slew rate
and amplitude. Using parallel acceleration such as SENSE or GRAPPA effectively
decreases the esp by a factor of the acceleration factor, (i.e. 2 or 3 fold).
Experiments
In this lab we will acquire images with different effective esp and compare the distortion
in the brain.
Acquisition :
1) epi_esp730: voxel size = 3.1 x 3.1 x 3.1, Matrix size = 64x64, BW=1502Hz/px,
ESP=0.73ms, effective esp =0.73ms
2) epi_esp460: voxel size = 3.1 x 3.1 x 3.1, Matrix size = 64x64, BW=2520Hz/px,
ESP=0.46ms, effective esp =0.46ms
3) epi_esp480_grappa: voxel size = 3.1 x 3.1 x 3.1, Matrix size = 64x64,
BW=2520Hz/px, ESP=0.48ms, effective esp =0.46ms
™ Lab Question 10: Estimate the distortion in frontal lobes by measuring
distance on the scanner to some reference feature. Plot the distortion in
mm as a function of effective esp.
SIEMENS MAGNETOM TrioTim syngo MR B15
\\USER\INVESTIGATORS\HST_583\Physics2\tse_IR1
TA: 0:26
Properties
Prio Recon
Before measurement
After measurement
Load to viewer
Inline movie
Auto store images
Load to stamp segments
Load images to graphic
segments
Auto open inline display
AutoAlign Spine
Start measurement without
further preparation
Wait for user to start
Start measurements
PAT: Off
Voxel size: 1.9×1.9×5.0 mm
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Off
On
1
50 %
R0.7 A10.8 H12.2
T > C-10.3
R >> L
90.00 deg
0%
240 mm
75.0 %
5.0 mm
3000 ms
12 ms
1
1
None
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MTC
Magn. preparation
TI
Freeze suppressed tissue
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Fat suppr.
Fat sat. mode
Water suppr.
Restore magn.
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Slice-sel. IR
200 ms
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180 deg
None
Strong
None
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------------------------------------------------------------------------------------
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Phase resolution
Phase partial Fourier
Trajectory
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Short term
Real
1
Each measurement
128
100 %
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Cartesian
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------------------------------------------------------------------------------------
PAT mode
Matrix Coil Mode
None
Auto (CP)
------------------------------------------------------------------------------------
Image Filter
Distortion Corr.
Prescan Normalize
Normalize
Geometry
Multi-slice mode
Series
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Off
Off
Off
SIEMENS: tse
Off
Off
Interleaved
Interleaved
------------------------------------------------------------------------------------
Special sat.
None
------------------------------------------------------------------------------------
System
Body
HEP
HEA
Off
On
On
------------------------------------------------------------------------------------
Positioning mode
Table position
Table position
MSMA
Sagittal
Coronal
Transversal
Save uncombined
Coil Combine Mode
Auto Coil Select
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single
Routine
Slice group 1
Slices
Dist. factor
Position
Orientation
Phase enc. dir.
Rotation
Phase oversampling
FoV read
FoV phase
Slice thickness
TR
TE
Averages
Concatenations
Filter
Coil elements
Averaging mode
Reconstruction
Measurements
Multiple series
Raw filter
Elliptical filter
Off
On
Off
On
Off
Off
Rel. SNR: 1.00
REF
H
0 mm
S - C - T
R >> L
A >> P
F >> H
Off
Adaptive Combine
Default
------------------------------------------------------------------------------------
Shim mode
Adjust with body coil
Confirm freq. adjustment
Assume Silicone
Ref. amplitude 1H
Adjustment Tolerance
Adjust volume
Position
Orientation
Rotation
R >> L
A >> P
F >> H
Physio
1st Signal/Mode
Tune up
Off
Off
Off
337.166 V
Auto
Isocenter
Transversal
0.00 deg
350 mm
263 mm
350 mm
None
------------------------------------------------------------------------------------
Dark blood
Off
------------------------------------------------------------------------------------
Resp. control
Off
Inline
Subtract
Std-Dev-Sag
Std-Dev-Cor
Std-Dev-Tra
Std-Dev-Time
MIP-Sag
MIP-Cor
MIP-Tra
MIP-Time
Save original images
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
Sequence
Introduction
Dimension
Compensate T2 decay
Reduce Motion Sens.
Contrasts
Bandwidth
Flow comp.
Allowed delay
Echo spacing
On
2D
Off
Off
1
130 Hz/Px
No
0s
11.7 ms
1/+
SIEMENS MAGNETOM TrioTim syngo MR B15
------------------------------------------------------------------------------------
Define
Turbo factor
Echo trains per slice
RF pulse type
Gradient mode
Turbo factor
15
7
Normal
Fast
2/+
SIEMENS MAGNETOM TrioTim syngo MR B15
\\USER\INVESTIGATORS\HST_583\Physics2\se_mc
TA: 9:42
PAT: Off
Properties
Prio Recon
Before measurement
After measurement
Load to viewer
Inline movie
Auto store images
Load to stamp segments
Load images to graphic
segments
Auto open inline display
AutoAlign Spine
Start measurement without
further preparation
Wait for user to start
Start measurements
Routine
Slice group 1
Slices
Dist. factor
Position
Orientation
Phase enc. dir.
Rotation
Phase oversampling
FoV read
FoV phase
Slice thickness
TR
TE 1
TE 2
TE 3
TE 4
TE 5
TE 6
TE 7
TE 8
Averages
Concatenations
Filter
Coil elements
Contrast
MTC
Magn. preparation
Flip angle
Fat suppr.
Fat sat. mode
Water suppr.
Voxel size: 1.1×1.1×5.0 mm
Off
Off
On
Off
single
Resolution
Base resolution
Phase resolution
Phase partial Fourier
Interpolation
1
100 %
R0.7 A10.8 H12.2
T > C-10.3
A >> P
0.00 deg
0 %
220 mm
100.0 %
5.0 mm
4000 ms
14.3 ms
28.6 ms
42.9 ms
57.2 ms
71.5 ms
85.8 ms
100.1 ms
114.4 ms
1
1
Raw filter
HEA;HEP
Off
None
180 deg
None
Strong
None
Short term
Magnitude
1
Each measurement
192
100 %
6/8
Off
------------------------------------------------------------------------------------
PAT mode
Matrix Coil Mode
None
Auto (CP)
------------------------------------------------------------------------------------
Image Filter
Geometry
Multi-slice mode
Series
SIEMENS: se_mc
Off
Off
Off
On
Weak
25
Off
Interleaved
Interleaved
------------------------------------------------------------------------------------
Special sat.
System
Body
HEP
HEA
None
Off
On
On
------------------------------------------------------------------------------------
------------------------------------------------------------------------------------
Averaging mode
Reconstruction
Measurements
Multiple series
Distortion Corr.
Prescan Normalize
Normalize
Raw filter
Intensity
Slope
Elliptical filter
Off
On
Off
On
Off
Off
Rel. SNR: 1.00
Off
Positioning mode
Table position
Table position
MSMA
Sagittal
Coronal
Transversal
Save uncombined
Coil Combine Mode
Auto Coil Select
REF
H
0 mm
S - C - T
R >> L
A >> P
F >> H
Off
Adaptive Combine
Default
------------------------------------------------------------------------------------
Shim mode
Adjust with body coil
Confirm freq. adjustment
Assume Silicone
Ref. amplitude 1H
Adjustment Tolerance
Adjust volume
Position
Orientation
Rotation
R >> L
A >> P
F >> H
Physio
1st Signal/Mode
Tune up
Off
Off
Off
337.166 V
Auto
Isocenter
Transversal
0.00 deg
350 mm
263 mm
350 mm
None
------------------------------------------------------------------------------------
Dark blood
Off
Inline
Subtract
Liver registration
Std-Dev-Sag
Std-Dev-Cor
Std-Dev-Tra
Std-Dev-Time
MIP-Sag
MIP-Cor
MIP-Tra
MIP-Time
Save original images
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
Sequence
Introduction
Contrasts
Bandwidth
Allowed delay
On
8
202 Hz/Px
0 s
------------------------------------------------------------------------------------
RF pulse type
3/+
Normal
SIEMENS MAGNETOM TrioTim syngo MR B15
Gradient mode
Fast
4/+
SIEMENS MAGNETOM TrioTim syngo MR B15
\\USER\INVESTIGATORS\HST_583\Physics2\T2star_8echos
TA: 0:11
Properties
Prio Recon
Before measurement
After measurement
Load to viewer
Inline movie
Auto store images
Load to stamp segments
Load images to graphic
segments
Auto open inline display
AutoAlign Spine
Start measurement without
further preparation
Wait for user to start
Start measurements
PAT: Off
Voxel size: 2.0×2.0×5.0 mm
Off
single
1
20 %
R0.7 A10.8 H12.2
T > C-10.3
A >> P
0.00 deg
0 %
256 mm
100.0 %
5.0 mm
100 ms
6.00 ms
10.00 ms
15.00 ms
20.00 ms
30.00 ms
50.00 ms
70.00 ms
80.00 ms
1
1
Raw filter
HEA;HEP
Contrast
MTC
Magn. preparation
Flip angle
Fat suppr.
Water suppr.
Off
None
15 deg
None
None
Long term
Magnitude
1
Each measurement
128
100 %
6/8
Off
------------------------------------------------------------------------------------
PAT mode
Matrix Coil Mode
Saturation mode
Special sat.
Sequential
Interleaved
Standard
None
------------------------------------------------------------------------------------
System
Body
HEP
HEA
None
Auto (CP)
Positioning mode
Table position
Table position
MSMA
Sagittal
Coronal
Transversal
Save uncombined
Coil Combine Mode
Auto Coil Select
Off
On
On
REF
H
0 mm
S - C - T
R >> L
A >> P
F >> H
Off
Adaptive Combine
Default
------------------------------------------------------------------------------------
Shim mode
Adjust with body coil
Confirm freq. adjustment
Assume Silicone
Ref. amplitude 1H
Adjustment Tolerance
Adjust volume
Position
Orientation
Rotation
R >> L
A >> P
F >> H
Physio
1st Signal/Mode
Segments
Tune up
Off
Off
Off
337.166 V
Auto
Isocenter
Transversal
0.00 deg
350 mm
263 mm
350 mm
None
1
------------------------------------------------------------------------------------
Dark blood
Off
------------------------------------------------------------------------------------
Resp. control
Inline
Subtract
Liver registration
Std-Dev-Sag
Std-Dev-Cor
Std-Dev-Tra
Std-Dev-Time
MIP-Sag
MIP-Cor
MIP-Tra
MIP-Time
Save original images
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
------------------------------------------------------------------------------------
Wash - In
Wash - Out
TTP
------------------------------------------------------------------------------------
Image Filter
Distortion Corr.
Off
Off
On
Weak
25
Off
------------------------------------------------------------------------------------
------------------------------------------------------------------------------------
Resolution
Base resolution
Phase resolution
Phase partial Fourier
Interpolation
Geometry
Multi-slice mode
Series
SIEMENS: gre
------------------------------------------------------------------------------------
Off
Off
On
Routine
Slice group 1
Slices
Dist. factor
Position
Orientation
Phase enc. dir.
Rotation
Phase oversampling
FoV read
FoV phase
Slice thickness
TR
TE 1
TE 2
TE 3
TE 4
TE 5
TE 6
TE 7
TE 8
Averages
Concatenations
Filter
Coil elements
Averaging mode
Reconstruction
Measurements
Multiple series
Prescan Normalize
Normalize
Raw filter
Intensity
Slope
Elliptical filter
Off
On
Off
On
Off
Off
Rel. SNR: 1.00
Off
Off
5/+
Off
Off
Off
SIEMENS MAGNETOM TrioTim syngo MR B15
PEI
MIP - time
Sequence
Introduction
Dimension
Phase stabilisation
Asymmetric echo
Contrasts
Bandwidth 1
Bandwidth 2
Bandwidth 3
Bandwidth 4
Bandwidth 5
Bandwidth 6
Bandwidth 7
Bandwidth 8
Flow comp. 1
Flow comp. 2
Flow comp. 3
Flow comp. 4
Flow comp. 5
Flow comp. 6
Flow comp. 7
Flow comp. 8
Readout mode
Allowed delay
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Off
On
2D
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Off
8
300 Hz/Px
300 Hz/Px
300 Hz/Px
300 Hz/Px
300 Hz/Px
300 Hz/Px
300 Hz/Px
300 Hz/Px
No
No
No
No
No
No
No
No
Bipolar
0 s
------------------------------------------------------------------------------------
RF pulse type
Gradient mode
Excitation
RF spoiling
Normal
Fast
Slice-sel.
On
6/+
SIEMENS MAGNETOM TrioTim syngo MR B15
\\USER\INVESTIGATORS\HST_583\Physics2\epi_esp730
TA: 2.0 s
PAT: Off
Properties
Prio Recon
Before measurement
After measurement
Load to viewer
Inline movie
Auto store images
Load to stamp segments
Load images to graphic
segments
Auto open inline display
AutoAlign Spine
Start measurement without
further preparation
Wait for user to start
Start measurements
Voxel size: 3.1×3.1×3.1 mm
Off
On
Off
On
Off
Off
Positioning mode
Table position
Table position
MSMA
Sagittal
Coronal
Transversal
Coil Combine Mode
Auto Coil Select
Off
90 deg
Fat sat.
------------------------------------------------------------------------------------
Long term
Magnitude
1
0 ms
Off
64
100 %
Off
Off
Shim mode
Adjust with body coil
Confirm freq. adjustment
Assume Silicone
Ref. amplitude 1H
Adjustment Tolerance
Adjust volume
Position
Orientation
Rotation
R >> L
A >> P
F >> H
None
Auto (CP)
BOLD
GLM Statistics
Dynamic t-maps
Starting ignore meas
Ignore after transition
Model transition states
Temp. highpass filter
Threshold
Paradigm size
Meas
Motion correction
Spatial filter
Off
Off
0
0
Off
Off
4.00
1
Baseline
Off
Off
Sequence
Introduction
Bandwidth
Free echo spacing
Echo spacing
Off
1502 Hz/Px
Off
0.73 ms
------------------------------------------------------------------------------------
EPI factor
RF pulse type
Gradient mode
64
Normal
Fast
------------------------------------------------------------------------------------
Dummy Scans
Off
Off
On
Off
Off
Interleaved
Interleaved
------------------------------------------------------------------------------------
Special sat.
R0.3 A11.0 F2.1
T > C-10.4
0.34 deg
200 mm
200 mm
45 mm
None
------------------------------------------------------------------------------------
Geometry
Multi-slice mode
Series
Standard
Off
Off
Off
337.166 V
Auto
Physio
1st Signal/Mode
------------------------------------------------------------------------------------
Distortion Corr.
Prescan Normalize
Raw filter
Elliptical filter
Hamming
FIX
H
0 mm
S - C - T
R >> L
A >> P
F >> H
Sum of Squares
Default
------------------------------------------------------------------------------------
Contrast
MTC
Flip angle
Fat suppr.
PAT mode
Matrix Coil Mode
Off
On
On
------------------------------------------------------------------------------------
Off
single
9
67 %
R0.3 A11.0 F2.1
T > C-10.4
A >> P
0.34 deg
0%
200 mm
100.0 %
3.10 mm
2000 ms
30 ms
1
1
None
HEA;HEP
Resolution
Base resolution
Phase resolution
Phase partial Fourier
Interpolation
USER: ep2d_bold_MGH_pro_tb
System
Body
HEP
HEA
Off
Off
On
Routine
Slice group 1
Slices
Dist. factor
Position
Orientation
Phase enc. dir.
Rotation
Phase oversampling
FoV read
FoV phase
Slice thickness
TR
TE
Averages
Concatenations
Filter
Coil elements
Averaging mode
Reconstruction
Measurements
Delay in TR
Multiple series
Rel. SNR: 1.00
None
7/+
0
SIEMENS MAGNETOM TrioTim syngo MR B15
\\USER\INVESTIGATORS\HST_583\Physics2\epi_esp460
TA: 2.0 s
PAT: Off
Properties
Prio Recon
Before measurement
After measurement
Load to viewer
Inline movie
Auto store images
Load to stamp segments
Load images to graphic
segments
Auto open inline display
AutoAlign Spine
Start measurement without
further preparation
Wait for user to start
Start measurements
Voxel size: 3.1×3.1×3.1 mm
Off
On
Off
On
Off
Off
Positioning mode
Table position
Table position
MSMA
Sagittal
Coronal
Transversal
Coil Combine Mode
Auto Coil Select
Off
90 deg
Fat sat.
------------------------------------------------------------------------------------
Long term
Magnitude
1
0 ms
Off
64
100 %
Off
Off
Shim mode
Adjust with body coil
Confirm freq. adjustment
Assume Silicone
Ref. amplitude 1H
Adjustment Tolerance
Adjust volume
Position
Orientation
Rotation
R >> L
A >> P
F >> H
None
Auto (CP)
BOLD
GLM Statistics
Dynamic t-maps
Starting ignore meas
Ignore after transition
Model transition states
Temp. highpass filter
Threshold
Paradigm size
Meas
Motion correction
Spatial filter
Off
Off
0
0
Off
Off
4.00
1
Baseline
Off
Off
Sequence
Introduction
Bandwidth
Free echo spacing
Echo spacing
Off
2520 Hz/Px
Off
0.46 ms
------------------------------------------------------------------------------------
EPI factor
RF pulse type
Gradient mode
64
Normal
Fast
------------------------------------------------------------------------------------
Dummy Scans
Off
Off
On
Off
Off
Interleaved
Interleaved
------------------------------------------------------------------------------------
Special sat.
R0.3 A11.0 F2.1
T > C-12.5
0.34 deg
200 mm
200 mm
45 mm
None
------------------------------------------------------------------------------------
Geometry
Multi-slice mode
Series
Standard
Off
Off
Off
337.166 V
Auto
Physio
1st Signal/Mode
------------------------------------------------------------------------------------
Distortion Corr.
Prescan Normalize
Raw filter
Elliptical filter
Hamming
FIX
H
0 mm
S - C - T
R >> L
A >> P
F >> H
Sum of Squares
Default
------------------------------------------------------------------------------------
Contrast
MTC
Flip angle
Fat suppr.
PAT mode
Matrix Coil Mode
Off
On
On
------------------------------------------------------------------------------------
Off
single
9
67 %
R0.3 A11.0 F2.1
T > C-12.5
A >> P
0.34 deg
0%
200 mm
100.0 %
3.10 mm
2000 ms
30 ms
1
1
None
HEA;HEP
Resolution
Base resolution
Phase resolution
Phase partial Fourier
Interpolation
USER: ep2d_bold_MGH_pro_tb
System
Body
HEP
HEA
Off
Off
On
Routine
Slice group 1
Slices
Dist. factor
Position
Orientation
Phase enc. dir.
Rotation
Phase oversampling
FoV read
FoV phase
Slice thickness
TR
TE
Averages
Concatenations
Filter
Coil elements
Averaging mode
Reconstruction
Measurements
Delay in TR
Multiple series
Rel. SNR: 1.00
None
8/+
0
SIEMENS MAGNETOM TrioTim syngo MR B15
\\USER\INVESTIGATORS\HST_583\Physics2\epi_esp480_grappa2
TA: 8.0 s
PAT: 2
Properties
Prio Recon
Before measurement
After measurement
Load to viewer
Inline movie
Auto store images
Load to stamp segments
Load images to graphic
segments
Auto open inline display
AutoAlign Spine
Start measurement without
further preparation
Wait for user to start
Start measurements
Voxel size: 3.1×3.1×3.1 mm
Series
Off
On
Off
On
Off
Off
System
Body
HEP
HEA
Off
On
On
Positioning mode
Table position
Table position
MSMA
Sagittal
Coronal
Transversal
Coil Combine Mode
Auto Coil Select
FIX
H
0 mm
S - C - T
R >> L
A >> P
F >> H
Sum of Squares
Default
Shim mode
Adjust with body coil
Confirm freq. adjustment
Assume Silicone
Ref. amplitude 1H
Adjustment Tolerance
Adjust volume
Position
Orientation
Rotation
R >> L
A >> P
F >> H
Standard
Off
Off
Off
337.166 V
Auto
R0.3 A11.0 F2.1
T > C-12.5
0.34 deg
200 mm
200 mm
45 mm
Physio
1st Signal/Mode
None
Long term
Magnitude
1
0 ms
Off
BOLD
GLM Statistics
Dynamic t-maps
Starting ignore meas
Ignore after transition
Model transition states
Temp. highpass filter
Threshold
Paradigm size
Meas
Motion correction
Spatial filter
Off
Off
0
0
Off
Off
4.00
1
Baseline
Off
Off
64
100 %
Off
Off
Sequence
Introduction
Bandwidth
Free echo spacing
Echo spacing
Off
2520 Hz/Px
Off
0.48 ms
------------------------------------------------------------------------------------
------------------------------------------------------------------------------------
GRAPPA
2
32
Auto (Triple)
Separate
------------------------------------------------------------------------------------
EPI factor
RF pulse type
Gradient mode
64
Normal
Fast
------------------------------------------------------------------------------------
Dummy Scans
------------------------------------------------------------------------------------
Geometry
Multi-slice mode
None
------------------------------------------------------------------------------------
Off
90 deg
Fat sat.
Distortion Corr.
Prescan Normalize
Raw filter
Elliptical filter
Hamming
Interleaved
------------------------------------------------------------------------------------
Off
single
Contrast
MTC
Flip angle
Fat suppr.
PAT mode
Accel. factor PE
Ref. lines PE
Matrix Coil Mode
Reference scan mode
Special sat.
Off
Off
On
9
67 %
R0.3 A11.0 F2.1
T > C-12.5
A >> P
0.34 deg
0%
200 mm
100.0 %
3.10 mm
2000 ms
30 ms
1
1
None
HEA;HEP
Resolution
Base resolution
Phase resolution
Phase partial Fourier
Interpolation
USER: ep2d_bold_MGH_pro_tb
------------------------------------------------------------------------------------
Routine
Slice group 1
Slices
Dist. factor
Position
Orientation
Phase enc. dir.
Rotation
Phase oversampling
FoV read
FoV phase
Slice thickness
TR
TE
Averages
Concatenations
Filter
Coil elements
Averaging mode
Reconstruction
Measurements
Delay in TR
Multiple series
Rel. SNR: 1.00
Off
Off
On
Off
Off
Interleaved
9/­
0