Diff for "ImagingSequences" - CBU MRI facility Wiki
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= Standard imaging sequences =

== CBU_EPI ==

|| Description || Standard EPI sequence for fMRI ||
|| Acquisition time || 2 s (per volume) ||
|| Type || 2D ||
|| Slices || 32 ||
|| Slice gap || 25% ||
|| Slice thickness || 3 mm ||
|| Slice order || Descending (32,31,...,1) ||
|| FOV || 192 mm x 192 mm ||
|| Matrix || 64 x 64 ||
|| Resolution || 3 mm x 3mm ||
|| TR || 2000 ms ||
|| TE || 30 ms ||
|| Flip angle || 78 deg ||
|| Bandwidth || 2232 Hz/Px ||
|| Echo spacing || 0.51 ms ||

=== Trigger pulse timing ===

To within a few ms, the stimulus delivery trigger pulse happens 35 ms before the acquisition of the first scan (centre of k space) of each volume. Note there is a latency of 20 ms in the visual display. The trigger pulse length is 1 ms.

=== Slice order ===

The slice order is interleaved: 1, 3, 5... 2, 4, 6. To put this into SPM directly when asked for the slice order write [1:2:31 2:2:32]. This is the default for aa_ver1

== CBU_MPRAGE ==

|| Description || High-resolution structural MRI ||
|| Acquisition time || 4 min 16 s ||
|| Type || 3D ||
|| FOV || 256 mm x 240 mm x 160 mm ||
|| Matrix || 256 x 240 x 160 ||
|| Resolution || 1 mm isotropic ||
|| TR || 2250 ms ||
|| TI || 900 ms ||
|| TE || 2.99 ms ||
|| Flip angle || 9 deg ||
|| Parallel imaging || GRAPPA [[BR]] Acceleration factor PE: 2 [[BR]] Reference lines PE: 24 ||

== CBU_TSE ==

|| Description || T2-weighted structural MRI ||
|| Acquisition time || 1 min 38 s ||
|| Slices || 29 ||
|| Slice gap || 30% ||
|| Slice thickness || 4 mm ||
|| Type || 2D ||
|| FOV || 220 mm x 220 mm ||
|| Matrix || 320 x 320 ||
|| Resolution || 0.7 x 0.7 mm ||
|| TR || 5600 ms ||
|| TE || 102 ms ||
|| Flip angle (refoc. pulse) || 140 deg ||
|| Parallel imaging || GRAPPA [[BR]] Acceleration factor PE: 2 [[BR]] Reference lines PE: 26 ||

== CBU_Fieldmapping ==

|| Description || Magnetic field mapping sequence. Required for [[BR]] - undistortion of fMRI data [[BR]] - functional sensitivity mapping ||
|| Acquisition time || 54 s ||
|| Type || 2D ||
|| Slices || 32 ||
|| Slice gap || 25% ||
|| Slice thickness || 3 mm ||
|| FOV || 192 mm x 192 mm ||
|| Matrix || 64 x 64 ||
|| Resolution || 3 mm x 3 mm ||
|| TR || 400 ms ||
|| TE || 5.19 ms / 7.65 ms ||
|| Flip angle || 60 deg ||
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This page has moved to wiki:imaging:ImagingSequences:Imaging Sequences

None: ImagingSequences (last edited 2013-03-08 10:21:22 by localhost)