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Gold Standard Phantom's recommendation
Gold Standard Phantoms recommends the following scanner parameters when using the Veriflux phantom for performing fMRI stability analysis.
|
Acquisition type |
GRE-EPI, FFE-EPI |
|---|---|
|
Magnetic Field Strength |
3T |
|
Head coil |
Coil used for fMRI. Recommendation: 32 or 64-elements coil. |
|
Scan plane |
Plain axial / transverse |
|
Field of view |
200mm |
|
Slices |
As many as possible within a TR = 2000ms, typically 32. |
|
Slice thickness |
4mm + 1mm gap |
|
TR |
2000ms |
|
TE |
30ms |
|
Flip angle |
90 degrees |
|
Parallel imaging factor |
0 / Off |
|
Matrix |
64x64 |
|
Number of volumes |
200 |
|
Scan time |
6min 40sec |
|
Dummy scans* |
Min 3 |
|
Reconstruction |
Sum-of-square |
*As part of the protocol, you can set up this parameter, which means that the first three scans are going to be acquired but not saved. This brings the magnetization into a steady-state.
Possible alternative protocols
The following set of parameters have been successfully used with Veriflux
|
Acquisition type |
GRE-EPI, FFE-EPI |
|---|---|
|
Scanner Magnetic Field Strength |
3T |
|
Head coil |
32 coil |
|
Scan plane |
Plain Axial / Transverse |
|
Field of view |
200mm |
|
Slices |
16 |
|
Slice thickness |
4mm + 1mm gap |
|
TR |
1000ms |
|
TE |
30ms |
|
Flip angle |
90 degrees |
|
Parallel imaging factor |
0 / Off |
|
Matrix |
64x64x16 |
|
Number of volumes |
400 |
|
Scan time |
6 min 40s |
|
Dummy Scans |
Min 3 |
|
Reconstruction |
Sum-of-square |
FBIRN protocol parameters
The following set of parameters are compliant with the FBIRN protocol. The use of 1.5T scanners is supported, but not recommended.
|
Acquisition type |
GRE-EPI or Spiral GRE |
||
|---|---|---|---|
|
Scanner Magnetic Field Strength |
1.5T |
3T |
7T |
|
Head coil |
Coil used for fMRI. Recommendation: 32 or 64-elements coil. |
||
|
Scan plane |
Axial |
||
|
Field of view |
220mm |
||
|
Number of Slices |
28 |
32 |
38 |
|
Slice thickness |
4mm + 1mm gap |
||
|
TR |
2000ms |
||
|
TE |
40ms |
30ms |
25ms |
|
Flip angle |
90 degrees |
||
|
Bandwidth |
+-100kHz |
||
|
Parallel imaging factor |
0 / Off |
||
|
Matrix |
64x64 |
||
|
Number of volumes |
200 |
||
|
Scan time |
6min 40sec |
||
|
Dummy Scans |
Min 3 |
||
|
Reconstruction |
Sum-of-square |
||