[Mristudio-users] fiber tracking

[Sona Saksena]

Hi,

Thanks for your suggestion. There is a option in the fiber tracking
parameters "Flip Eigen Vector". Do I have to use this check box?

Actually we have applied gradients in 26 directions (GE Scanner, 3Tesla). I
am not sure about the sign of all of the components in the gradient
table.  What shall I do?

This is the gradient table.


0: 0.000000, 0.000000, 0.000000

1: 1.000000, 0.000000, 0.000000

2: 0.849000, 0.528000, 0.000000

3: -0.108000, 0.565000, 0.818000

4: 0.884000, -0.345000, -0.315000

5: -0.003000, -0.736000, 0.677000

6: -0.868000, -0.238000, 0.436000

7: 0.799000, 0.370000, 0.475000

8: -0.162000, 0.987000, 0.000000

9: 0.866000, -0.129000, 0.483000

10: -0.212000, -0.936000, 0.281000

11: 0.068000, -0.892000, -0.446000

12: 0.550000, -0.544000, -0.634000

13: -0.435000, -0.422000, 0.795000

14: -0.599000, 0.780000, 0.182000

15: -0.525000, 0.030000, -0.851000

16: -0.600000, -0.688000, 0.409000

17: 0.653000, -0.060000, -0.755000

18: 0.207000, -0.076000, -0.975000

19: -0.413000, -0.699000, -0.584000

20: -0.436000, 0.822000, -0.366000

21: 0.462000, 0.874000, 0.148000

22: -0.503000, 0.488000, -0.713000

23: 0.824000, -0.530000, 0.202000

24: 0.297000, 0.349000, 0.889000

25: -0.040000, 0.318000, -0.947000



Please do suggest?



regards



sona




On Thu, Jan 7, 2010 at 3:32 PM, susumu mori <susumu at mri.jhu.edu> wrote:

> Hi Sona,
>
> I suggest you to go through the manual section in www.mristudio.org. There
> you can find a user's manual for DtiStudio. It gives you the step-by-step
> procedure for tensor calculation and fiber tracking.
>
>   On Thu, Jan 7, 2010 at 2:48 PM, Sona Saksena <saksena.sona at gmail.com>wrote:
>
>>   Hello,
>>
>> Please can you tell me steps of performing fiber tracking in brain tumor
>> patients using DTI studio. The DTI data is on 3T GE scanner with gradients
>> applied in 26 directions. How to generate the reconstructed fibres?
>>
>> thanks
>>
>> regards
>>
>> Sona Saksena
>>
>>
>>
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-- 
Sona Saksena
Ph. D Scholar
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