[Mristudio-users] ask for help on Philips AcHieva 1.5 T scanner gradient table
罗璐娇
lujiaoluo1990 at 126.com
Thu Jul 4 01:23:03 EDT 2013
Hello experts,
I was using dti studio to process my diffusion data obtained from Philips AcHieva 1.5 T scanner(medium angular, format: DICOM, in total of 17 images) .
I used the pre-defined gradient table in dti studio listed below, while plus the 16th line to exclude the last average image
0: 0, 0, 0
1: 1.0, 0.0, 0.0
2: 0.0, 1.0, 0.0
3: 0.0, 0.0, 1.0
4: -0.1789, -0.1113, -0.9776
5: -0.0635, 0.3767, -0.9242
6: 0.710, 0.0516, -0.7015
7: 0.6191, -0.4385, -0.6515
8: 0.2424, 0.7843, -0.5710
9: -0.2589, -0.6180, -0.7423
10: -0.8169, 0.1697, -0.5513
11: -0.8438, 0.5261, -0.1060
12: -0.2626, 0.9548, -0.1389
13: 0.0001, 0.9689, 0.2476
14: 0.7453, 0.6663, 0.0242
15: 0.9726, 0.2317, 0.0209
16: 100 100 100
But resulting images were not that fine, and couldn't distinguish the fiber orientations clearly. I tried to use mricron (dcm2niigue.exe) to obtain the bvecs and bvals file. But it also doesn't work.
Would you please tell me how to solve this problem?
Thanks so much!
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