[gate-users] Re: [gate-devel] voxelized phantom

[Corinne J Groiselle]

It's basically a cylinder oriented along the Y-axis. So it's easy to 
check on the the geometry using the symmetries. I ran 2 simulations with 
an analytically defined phantom and the same phantom in a voxelized 
geometry to verify I obtain the same results!

matrix: 160x50x160 (XxYxZ)
pixel size: 1mm

-- Corinne

dimitris wrote:

> Hi Corinne,
>
>  
>
> Can you give us an idea of the size of your voxels. We had a similar 
> problem but the shift was quite big. In our case we had to displace 
> the phantom in the macro to get it in the right position, ie in the 
> centre of the FOV.
>
>  
>
> Cheers
>
>  
>
> Dimitris
>
>  
>
>  
>
>  
>
> Dimitris Visvikis,
>
> U650 INSERM,
>
> Laboratoire de Traitement d'Information Medicale,
>
> Equipe 'Quantification en Tomographie d'Emission',
>
> CHU Morvan,
>
> 5 avenue Foch,
>
> 29609 Brest,
>
> France
>
>  
>
> Tel: +33 (0)298 018114
>
> Fax: +33 (0)298 018124
>
> e-mail: dimitris at univ-brest.fr <mailto:dimitris at univ-brest.fr>
>
> website: latim.univ-brest.fr
>
>  
>
>  
>
> -----Original Message-----
> *From:* gate-devel-bounces at lphe1pet1.epfl.ch 
> [mailto:gate-devel-bounces at lphe1pet1.epfl.ch] *On Behalf Of *Corinne J 
> Groiselle
> *Sent:* vendredi 20 août 2004 03:14
> *To:* GATE developer mailing list; GATE feedback and helpline for users
> *Subject:* [gate-devel] voxelized phantom
>
>  
>
> Hello,
>
> I ran a simulation with a voxelized phantom (interfile format). It's 
> centered in the Z direction but when I look at the root output, I see 
> a 1.5 pixels shift.
>
> Did someone already noticed something similar? I verified and the 
> phantom is centered within the matrix.
>
> Thanks for your help,
>
> -- Corinne
>
>  
>
> ------------------------------------------------------------------------
>
> Corinne J. Groiselle, PhD
>
> Research instructor
>
> Division of Nuclear Medicine / Department of Radiology
> University of Massachusetts Medical School
> 55 Lake Avenue North
> Worcester, MA 01655
> USA
>
> _phone_: (508)-856-6123 - _fax_: (508)-856-4572
> _e-mail_: Corinne.Groiselle at umassmed.edu 
> <mailto:Corinne.Groiselle at umassmed.edu>
> _professional homepage_: http://users.umassmed.edu/corinne.groiselle
> _personal homepage_: http://corinne.groiselle.free.fr
>
>  
>
>------------------------------------------------------------------------
>
>_______________________________________________
>gate-devel mailing list
>gate-devel at lphe1pet1.epfl.ch
>http://lphe1pet1.epfl.ch/mailman/listinfo/gate-devel
>  
>

-- 

------------------------------------------------------------------------
Corinne J. Groiselle, PhD
Research instructor

Division of Nuclear Medicine / Department of Radiology
University of Massachusetts Medical School
55 Lake Avenue North
Worcester, MA 01655
USA

_phone_: (508)-856-6123 - fax: (508)-856-4572
_e-mail_: Corinne.Groiselle at umassmed.edu
_professional homepage_: http://users.umassmed.edu/corinne.groiselle
_personal homepage_: http://corinne.groiselle.free.fr


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