[Castor-users] Attenuation Image and Coefficients in PET List-mode Recon

[tmerlin]

Hi,


To add to Simon answer, if you have an attenuation image, there is no 
need to compute acf for each event in list-mode reconstruction. 
Attenuation correction will be computed from the attenuation image 
during the sensitivity image generation.

Also, in the event of the dimensions of reconstructed image do not match 
those of the atn image, make sure that the whole atn image is contained 
in the reconstruction FOV, as the atn image will be interpolated to the 
reconstruction dimensions before generating the sensitivity image.


Regards,

Thibaut



On 04/05/2017 14:05, STUTE Simon wrote:
>
> Hi Reza,
>
> This is a good point but we did not have time yet to implement it. 
> This feature will be provided in the next release.
>
> Cheers
>
> Simon
>
> ------------------------------------------------------------------------
> *De :* Castor-users [castor-users-bounces at lists.castor-project.org] de 
> la part de M.R Teimoori [reza.teimoori.s at gmail.com]
> *Envoyé :* mercredi 3 mai 2017 20:14
> *À :* castor-users at lists.castor-project.org
> *Objet :* [Castor-users] Attenuation Image and Coefficients in PET 
> List-mode Recon
>
> Hello,
>
> When reconstructing PET list-mode data with attenuation correction, 
> CASToR requires an attenuation correction factor for each event in the 
> input *.cdf file. Also, if the attenuation correction flag is on, an 
> attenuation image needs to be passed to CASToR which, as far as I 
> understand, is used during normalization.
>
> I am wondering why CASToR doesn't use the input attenuation image to 
> calculate an attenuation correction factor for each event automatically?
>
> Thank you all,
>
> Cheers,
> Reza
>
>
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-- 
Thibaut MERLIN -- PhD

Docteur en Imagerie Médicale au Laboratoire de Traitement de l'Information Medicale (LaTIM - INSERM UMR 1101)
Bâtiment 1
CHRU Morvan - 2, Av. Foch
29609 Brest CEDEX - FRANCE
Tel: 06.75.12.24.90

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