Hi,
I am acquiring DTI images on our Phillips 1.5 T. I need to overlay T2 scans on DTI to get lesion and non-lesion MD/FA/tractography info. My questions are:
1-I am acquiring DTI images in 32 directions, b=1000, only 1 4D volume, acquired in plane resolution of 0.87 x 0.87 with 3 mm slice thickness. The reconstructed dimensions are 2.5mm x 2.5mm x 3mm. Reconstructed Voxel resolution 256 x 256 x 60. Does this sound reasonable? I have seen other publications acquire DTI at 2-to-3 x 2-to-3 x 5-to-6mm? with voxel resolution of 90-128 x 90-128? Not sure if this too low of a resolution. can anyone comment on this? What are advantages or disadvantages of lower vs higher acquired resolutions? Also, some use an average of 3-9 images per slice. Any advantage of this, b/c the scan time would be huge.
many thanks in advance,
aj
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