652019-10-18 08:05:58MartaCorreia642018-01-24 07:24:10MartaCorreia632018-01-24 07:23:00MartaCorreia622018-01-24 07:20:28MartaCorreia612018-01-24 07:14:44MartaCorreia602018-01-24 07:07:20MartaCorreia592013-03-07 21:23:50localhostconverted to 1.6 markup582013-02-20 15:56:06MartaCorreia572013-02-04 15:04:03OlafHauk562012-11-02 13:53:54MartaCorreia552012-11-02 13:52:57MartaCorreia542012-11-02 13:52:09MartaCorreia532012-11-02 13:41:35MartaCorreia522012-11-02 13:39:41MartaCorreia512012-11-02 13:36:39MartaCorreia502012-11-02 13:35:33MartaCorreia492012-11-02 13:25:28MartaCorreia482012-11-02 13:24:23MartaCorreia472012-11-02 13:02:58MartaCorreia462012-11-02 13:02:31MartaCorreia452012-11-02 12:43:52MartaCorreia442012-02-10 22:33:39JonathanPeelle432011-03-21 14:38:02MartaCorreia422011-03-08 16:59:47AnnikaLinke412011-03-07 14:05:34MartaCorreia402011-03-07 14:02:30MartaCorreia392011-03-07 13:59:38MartaCorreia382011-03-07 10:56:48MartaCorreia372011-03-07 10:55:43MartaCorreia362011-03-07 10:54:50MartaCorreia352011-03-07 10:52:24MartaCorreia342011-03-07 10:51:47MartaCorreia332011-03-07 10:45:49MartaCorreia322011-03-07 10:44:11MartaCorreia312011-03-07 10:37:18MartaCorreia302011-03-07 10:36:03MartaCorreia292011-03-07 10:35:32MartaCorreia282011-03-07 10:34:37MartaCorreia272011-03-07 10:26:10MartaCorreia262011-03-07 10:24:41MartaCorreia252011-03-07 10:24:02MartaCorreia242011-03-07 10:21:37MartaCorreia232011-03-07 10:21:05MartaCorreia222011-03-07 10:08:23MartaCorreia212011-03-07 10:06:25MartaCorreia202011-03-07 10:05:23MartaCorreia192011-03-07 09:56:51MartaCorreia182011-03-07 09:55:57MartaCorreia172011-03-07 09:55:20MartaCorreia162011-03-07 09:54:46MartaCorreia152011-03-07 09:52:43MartaCorreia142011-03-07 09:51:46MartaCorreia132010-10-05 07:57:02cpc1-cmbg3-0-0-cust500.5-4.cable.virginmedia.com122010-06-19 12:41:26JonathanPeelle112010-06-19 12:41:07JonathanPeelle102010-06-18 17:02:25MartaCorreia92010-06-18 16:50:29MartaCorreia82010-02-04 21:31:17JonathanPeelle72010-01-20 15:44:18MartaCorreia62010-01-20 15:43:20MartaCorreia52010-01-20 15:12:06MartaCorreia42010-01-20 14:46:33MartaCorreia32009-10-22 08:47:41RhodriCusack22009-10-22 08:39:56RhodriCusack12009-10-22 08:39:34RhodriCusackmrclogo.gif

The sequences shown on this page are meant to be used as guidelines, but they can be modified in order to meet the needs of your study. If you would like some advice on setting up your sequence, please contact Marta Correia ( marta.correia@mrc-cbu.cam.ac.uk ). If you want to double check what parameters were used for images already acquired, you can also look at the information from the DICOM headers, which SPM saves when converting to Nifti format. After DICOM conversion every folder has a dicom_headers.mat file. In Matlab: > load dicom_headers.mat >> DICOMHEADERS{1}]]>will let you check the parameters for the images you've acquired.

For fMRI 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

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.

The multi-echo sequence was developed by Benedikt Poser and colleagues at the FC Donders Centre for Cognitive Neuroimaging, Nijmegen, The Netherlands. A comparison between multi-echo and standard fMRI acquisition can be found here . Description Echo planar imaging at multiple echo times Acquisition time 2.47s (per volume) Type 2D Slice 32 Slice gap 25% Slice thickness 3mm Slice order Descending (32,31,...,1) FOV 192mm x 192mm Matrix 64 x 64 Resolution 3mm x 3mm TR 2470ms TE 9.4ms, 21.2ms, 33ms, 45ms, 57ms Flip angle 83 deg Parallel imaging GRAPPA Acceleration factor PE: 3 Reference lines PE: 24

A wide range of different multi-band factors, voxel resolutions and repetition times can be achieved for both fMRI and diffusion MRI. Please contact Marta Correia marta.correia@mrc-cbu.cam.ac.uk to discuss the parameters which will best suit your needs. If you would like to know the exact imaging parameters used for your study, please contact the radiographers ( radiographers@mrc-cbu.cam.ac.uk ).

Description High-resolution structural MRI Acquisition time 4 min 32s Type 3D FOV 256 mm x 240 mm x 192mm Matrix 256 x 240 x192 Resolution 1 mm isotropic TR 2250 ms TI 900 ms TE 2.99 ms Flip angle 9 deg Parallel imaging GRAPPA Acceleration factor PE: 2 Reference lines PE: 24

Description High-resolution T2-weighted structural MRI Acquisition time 4 min 30s Type 3D FOV 256 mm x 240 mm x 192mm Matrix 256 x 240 x192 Resolution 1 mm isotropic TR 2800 ms TE 408 ms Flip angle 90 deg Bandwidth 751 Hz/Px Echo spacing 3.36 ms Parallel imaging GRAPPA Acceleration factor PE: 2 Reference lines PE: 24

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 5060 ms TE 102 ms Flip angle (refoc. pulse) 140 deg Parallel imaging GRAPPA Acceleration factor PE: 2 Reference lines PE: 26

Description Magnetic field mapping sequence. Required for - undistortion of fMRI data - 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

Description Standard sequence for diffusion MRI. - isotropic voxel resolution - interleaved slice acquisition Acquisition time 10min 14sec Type 2D Slices 68 Slice gap none Slice thickness 2 mm Slice order Interleaved FOV 192 mm x 192 mm Matrix 96 x 96 Resolution 2 mm x 2 mm TR 8500 ms TE 90 ms Diff directions 64 Diff weightings 2 b-value1 0 s/mm2 b-value2 1000 s/mm2 Parallel imaging GRAPPA Acceleration factor PE: 2 Reference lines PE: 40 For more information on the diffusion MRI sequence go to AnalyzingDiffusion. If you have an ongoing study or wish to compare your results with data that you had previously acquired, the old standard CBU sequence for diffusion imaging (CBU_DTI_64D_1A) will still be available to be used.

Description Susceptibility Weighted Imaging to image vessels and veins in the brain Acquisition time 6min 38s Type 3D Slices 72 Slice gap 0% Slice thickness 1.2 mm Slice order Interleaved FOV 230mm x 178mm Matrix 448 x 381 Resolution 0.6 mm x 0.5 mm TR 28 ms TE 20 ms Flip angle 15 deg Bandwidth 120 Hz/Px

Many other imaging sequences are available, so if you can't find what you need in the list above please contact Marta Correia ( marta.correia@mrc-cbu.cam.ac.uk ).