|
Main /
PointsetsMain.Pointsets HistoryHide minor edits - Show changes to output October 22, 2009, at 01:01 AM
by
- Changed line 5 from:
Ordered sets for [[files/Elec012_ordered.txt | 12]], [[files/Elec018_ordered.txt | 18]], [[files/Elec030_ordered.txt | 30]], [[files/Elec060_ordered.txt | 60]] and [[files/Elec061_ordered.txt | 61]] directions are available here. These can be converted to Camino scheme files with the @@pointset2scheme@@ command. to:
Ordered sets for [[http://www.cs.ucl.ac.uk/research/medic/camino/files/Elec012_ordered.txt | 12]], [[http://www.cs.ucl.ac.uk/research/medic/camino/files/Elec018_ordered.txt | 18]], [[http://www.cs.ucl.ac.uk/research/medic/camino/files/Elec030_ordered.txt | 30]], [[http://www.cs.ucl.ac.uk/research/medic/camino/files/Elec060_ordered.txt | 60]] and [[http://www.cs.ucl.ac.uk/research/medic/camino/files/Elec061_ordered.txt | 61]] directions are available here. These can be converted to Camino scheme files with the @@pointset2scheme@@ command. October 22, 2009, at 12:59 AM
by
- Added lines 1-9:
!! Ordered gradient directions The 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 @@PointSets@@ directory, so if the scan is fully completed, the results are still optimal. Ordered sets for [[files/Elec012_ordered.txt | 12]], [[files/Elec018_ordered.txt | 18]], [[files/Elec030_ordered.txt | 30]], [[files/Elec060_ordered.txt | 60]] and [[files/Elec061_ordered.txt | 61]] directions are available here. These can be converted to Camino scheme files with the @@pointset2scheme@@ command. If you use these directions, please cite: Cook PA, Symms M, Boulby PA and Alexander DC, [[http://www3.interscience.wiley.com/cgi-bin/fulltext/114219245/PDFSTART | Optimal acquisition orders of diffusion-weighted MRI measurements]], Journal of Magnetic Resonance Imaging, 25(5), 1051-1058, 2007. |