Voxel size and acquisition matrix
- Details
- Category: How To Acquire DW-MRI Data
- Last Updated: 09 April 2018
- Published: 09 April 2018
- Hits: 2007
- We recommend using iso-voxel data (x, y and z dimensions the same, i.e. 2x2x2 mm). If voxels are not isotropic, artificial diffusion measures will be introduced. Use the smallest voxel size possible on your scanner.
- Do not use a slice gap!
- The acquisition matrix should not be interpolated up to a higher resolution. Interpolation will only result in a visual improvement of the data, but in fact, it introduces unwanted artifacts and should thus be avoided!! Ask your MR technician to turn off interpolation on any DW-MRI sequence.
- Although it is not strictly necessary, we recommend using a square acquisition matrix (128x128, 96x96 etc), since BrainVoyager handles square matrices better than non-square matrices.
- Use as many slices as needed to cover the entire brain and cerebellum.