Dear Mugundhu,
the most interesting part was not listed in your parameter, which is slice thickness. I assume a value of 1.5mm or higher. Anyway, using a more isotropic voxel size is always recommended. For older scanners an isotropic voxel size of 1mm works best, while for newer scanners you can use the so-called Minnesota-sequence from the Human Connectome Project (with 0.8mm voxel size).
Best,
Christian
On Wed, 30 Aug 2023 07:19:09 +0530, Mugundhu R <[log in to unmask]> wrote:
>Dear Experts,
>I need your suggestions for setting the sequence in our new MRI scanner
>(United Image 3T). We used the default SPGR 3D T1 sequence, and the details
>are given below. I preprocessed the scans of three subjects using CAT12,
>and it took nearly 45 minutes for each subject.
>In most of the papers, the common sequence parameter used (including in my
>previous study) is a 1x1x1 voxel matrix with a FOV of 256 x 256. It takes
>10–15 minutes for each subject.
>
>Please suggest to me which sequence will be best for cortical and
>subcortical structural analysis.
>
>*T1_SPGR_FSP_3D_SAG*
>Image type: ORIGINAL\PRIMARY\M\UC\IF
>Manufacturer: UIH
>Model name: uMR 780
>Software version: R002
>Study id: 1904
>Series number: 201
>Repetition time (ms): 7.78
>Echo time[1] (ms): 3.1
>Inversion time (ms): 1010
>Flip angle: 10
>Number of averages: 1
>Slice thickness (mm): 0.666666687
>Slice spacing (mm): 0.666666687
>Image columns: 348
>Image rows: 384
>Phase encoding direction: ROW
>Voxel size x (mm): 0.666667
>Voxel size y (mm): 0.666667
>Number of volumes: 1
>Number of slices: 264
>Number of files: 264
>Number of frames: 0
>Slice duration (ms) : 0
>Orientation: sag
>
>Regards
>Mugudhu
>
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