[Insight-users] CSI spectro parameters

[Martin Kavec]

Stefano,

although I am not sure, but you could have a look into the DICOM conformance 
statement for your scanner, whether Siemens gives any details about it.

Martin

On Friday 23 February 2007 16:40, Stefano Peca wrote:
> Hi everyone, please help if you can!
>
> I have a multi-voxel magnetic resonance spectroscopy file (CSI - chemical
> shift imaging) and a T1 volume, many slices.  I need to know where exactly
> is the CSI grid (8x8 1ml voxels) in respect to the T1 volume.
>
> I'm using a Siemens Allegra Magnetom 3T.
>
> The CSI dicom file has this information in the header:
>
> sSpecPara.sVoI.sPosition.dSag            = -14.6151885
> sSpecPara.sVoI.sPosition.dCor            = 67.89309338
> sSpecPara.sVoI.sPosition.dTra            = -25.70038393
> sSpecPara.sVoI.sNormal.dSag              = -0.4226182617
> sSpecPara.sVoI.sNormal.dCor              = 0.906307787
> (sSpecPara.sVoI.sNormal.dTra              = 0.00307856 )
>
> but I don't know how to interpret it. They must somehow describe how the
> CSI grid is oriented...  if, for instance, the first 3 of these 5 header
> lines describes a position (maybe of the center of the grid), the question
> is: in respect to what? to the high definition T1 image on which the CSI
> slice was positioned, or to the center of the magnet?
>
> Well, if someone knows what these 5 numbers are  (occasionaly there are 6)
> , I'll be very grateful,
> Thanks very much,
> Stefano Peca
>
>
> Dr. Stefano Peca - MARBILab - "Enrico Fermi" Center @ Fondazione Santa
> Lucia - V.Ardeatina 306 - Roma, Italy - Tel.: +39 06 5150 1524 - Fax: +39
> 06 5150 1528 -  <mailto:stefano.peca at roma1.infn.it>
> stefano.peca at roma1.infn.it -