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PointsetsMain.Pointsets HistoryHide minor edits - Show changes to markup October 22, 2009, at 01:01 AM
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Ordered sets for , , , and directions are available here. These can be converted to Camino scheme files with the to:
Ordered sets for 12, 18, 30, 60 and 61 directions are available here. These can be converted to Camino scheme files with the October 22, 2009, at 12:59 AM
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Ordered gradient directionsThe sets of gradient directions provided with Camino are computed by electrostatic energy minimization (Jansons and Alexander, Inverse Problems, 2003). We have ordered a few of these sets to improve the results from partially completed scans. For each set of N gradient directions, we search for an ordering that minimizes the electrostatic energy of the first P (where 5 < P < N) directions, i.e., we want any partial set of P directions to be as evenly spread on the sphere as possible. The complete set of directions is identical to those provided with Camino in the Ordered sets for , , , and directions are available here. These can be converted to Camino scheme files with the If you use these directions, please cite: Cook PA, Symms M, Boulby PA and Alexander DC, Optimal acquisition orders of diffusion-weighted MRI measurements, Journal of Magnetic Resonance Imaging, 25(5), 1051-1058, 2007. |