[Mristudio-users] Error #_of_Images != (#_of_gradients) x (#_of_repetitions)

[Kevin Spitler]

Hello,

I have several Siemens datasets with the Error that the number of
Images does not equal the product of the number of gradients and
repetitions.

What is the recommended way to debug this problem?  Is this a problem
with the gradient that I am using?

My gradient is:
0: 0.000, 0.000, 0.000
 1: 0.500, 0.000, 0.500
 2: -0.500, 0.000, 0.500
 3: 0.000, 0.500, 0.500
 4: 0.000, 0.500, -0.500
 5: 0.500, 0.500, 0.000
 6: -0.500, 0.500, 0.000
 7: 1.000, 0.000, 1.000
 8: -1.000, 0.000, 1.000
 9: 0.000, 1.000, 1.000
 10: 0.000, 1.000, -1.000
 11: 1.000, 1.000, 0.000
 12: -1.000, 1.000, 0.000

After I click "OK" on the error message, DTI Studio does not crash.
Typically, only a portion of the brain is displayed (e.g., the
inferior portion).

B values used are 0,600,1200.  I have tried the following gradient
with similar results:
 0: 0.000, 0.000, 0.000,600
 1: 0.500, 0.000, 0.500,600
 2: -0.500, 0.000, 0.500,600
 3: 0.000, 0.500, 0.500,600
 4: 0.000, 0.500, -0.500,600
 5: 0.500, 0.500, 0.000,600
 6: -0.500, 0.500, 0.000,600
 7: 1.000, 0.000, 1.000,600
 8: -1.000, 0.000, 1.000,600
 9: 0.000, 1.000, 1.000,600
 10: 0.000, 1.000, -1.000,600
 11: 1.000, 1.000, 0.000,600
 12: -1.000, 1.000, 0.000,600
13: 0.500, 0.000, 0.500,1200
14: -0.500, 0.000, 0.500,1200
15: 0.000, 0.500, 0.500,1200
16: 0.000, 0.500, -0.500,1200
17: 0.500, 0.500, 0.000,1200
18: -0.500, 0.500, 0.000,1200
19: 1.000, 0.000, 1.000,1200
20: -1.000, 0.000, 1.000,1200
21: 0.000, 1.000, 1.000,1200
22: 0.000, 1.000, -1.000,1200
23: 1.000, 1.000, 0.000,1200
24: -1.000, 1.000, 0.000,1200

The error message then has the number of gradients =25, with the same
number of repetitions and images.

Thank you for helping me use these datasets.

Best,
Kevin