[Mristudio-users] DTI images from VErio

[susumu mori]

Hi Judy,

I guess you did 3 signal averaging?
In Siemens scanners, the signal averaging doesn't really average the data
and save all scans in separate files. So, you may have 3 repetitions of
1+20.

For the table, please try this;

0:   0, 0, 0
1:   1.000000,  0.000000,  0.000000;
2:   0.000000,  1.000000,  0.000000;
3:  -0.031984,  0.799591,  0.599693;
4:   0.856706,  0.493831, -0.148949;
5:   0.834429,  0.309159,  0.456234;
6:   0.834429, -0.309159,  0.456234;
7:   0.856706, -0.493831, -0.148949;
8:   0.822228,  0.000000, -0.569158;
9:   0.550834,  0.425872, -0.717784 ;
10:   0.468173,  0.834308, -0.291108 ;
11:  0.515933,  0.808894,  0.281963 ;
12:  0.391890,  0.515855,  0.761785 ;
13:  0.478151,  0.000000,  0.878278 ;
14:  0.391890, -0.515855,  0.761785 ;
15:  0.515933, -0.808894,  0.281963 ;
16:  0.468173, -0.834308, -0.291108 ;
17:  0.550834, -0.425872, -0.717784 ;
18:  0.111012, -0.264029, -0.958105 ;
19:  0.111012,  0.264029, -0.958105 ;
20:  0.031984,  0.799591, -0.599693 ;

On Tue, Aug 7, 2012 at 10:43 AM, Judy James <jjames2 at umc.edu> wrote:

>  Dear members,
> I have a question about a data set I received from Siemens Verio.
> The images are in Mosaic form with 63 sets of 28 images in it. The DICOM
> header says 20 directions with 1 average. I don't understand how it has 63
> sets of mosaic if it was only 20 directions.
>
> Can any one help?
> I am also on the look out for the 20 direction gradient table used on
> Verio. Can any one share it?
>
> Thanks
> Judy
>
>
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