[Mristudio-users] SIEMENS Avanto Gradient Directions (6)

susumu mori susumu at mri.jhu.edu
Thu Nov 25 14:27:19 EST 2010


I believe this is Siemens 6

0: 0, 0, 0

1: 1, 0, 1

2: -1, 0, 1

3: 0, 1, 1

4: 0, 1, -1

5: 1, 1, 0

6: -1, 1, 0


You can see this table is almost identical to yours (yours is unit-vector
normalized).

The small deviation is, I believe, the table in DICOM file includes the
small contributions from imaging gradients.

#3 and #4 of your table indeed look strange. I heard that the DICOM gradient
information in the latest operating system is correct. I'm not sure if that
implies the information in the old operating system is not right...

On Thu, Nov 25, 2010 at 2:07 PM, Gonzalo Rojas <
gonzalo.rojas.costa at gmail.com> wrote:

> Hi:
>
>  I got the following gradient directions table from the DICOM TAG (19,
> 100E):
>
> 1: 0.70817843   0.00571112   -0.70389509
>
> 2: 0.70889196   -0.00570537   0.70318659
>
> 3: 0.03170213   0.0                -0.03170213
>
> 4: 0.03168621   0.0                -0.03168621
>
> 5: 0.70427267   -0.70853239   0.00567962
>
> 6: 0.7039208     0.70959758    0.00425759
>
>
>  Why the directions 3 and 4 are equal ?...
>
>  Sincerely,
>
>
> Gonzalo Rojas Costa
>
>
> > ?I need the gradient directions table (6 directions) in a Siemens
> > Avanto MRI equipment release Syngo MR B13... Could you please send me?...
> >
> > ?Sincerely,
> >
> >
> > Gonzalo Roajs Costa
> > Department of Radiology
> > Clinica Las Condes
> > Santiago
> > Chile
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