[Castor-users] About the scatter correction in using GATERootToCastor function

[tmerlin]

Hi,

This option has been removed from version 3 as the scatter rate 
computation (directly calculated from the root metadata) is not 
consistent with TOF data as it doesn't take into account the TOF bin 
size, thus the implementation in version 2 was incorrect.

Besides, this option does not really provide a scatter correction 
estimation, but the actual rates directly computed from the Monte-Carlo 
simulated data. Currently there is only the possibility to ignore 
scatter/random events in the resulting datafile using the /-t/ option, 
otherwise the scatter correction factors estimation must be preformed 
and implemented by the user.

You can have more details regarding scatter correction with TOF in the 
following discussion thread: 
https://lists.castor-project.org/pipermail/castor-users/2019-November/000281.html 


Kind regards,
Thibaut

On 06/07/2021 09:48, 김연경 wrote:
> Dear CASToR users and developers,
>
> The scatter correction is not applied when converting GATE simulation 
> data (GATERootTocastor) using the TOF option in version 3. But, it is 
> possible in version 2.
> Q1. I want to apply a scatter correction when converting the GATE data 
> (list mode) using the TOF option. If so, is it correct to use version 2?
>
> Q2. Confirmed that the bugs in version 2 were fixed in version 3. Can 
> I still use version 2?
> I wonder if there is no difference (version2 vs version 3) in TOF 
> reconstruction using list-mode data.
>
> Thanking you in advance for your responses,
> Sincerely,
>
> -- 
>
> YEONKYEONG KIM
>
> Email: dusrud026 at gmail.com <mailto:dusrud026 at gmail.com>
>
-- 
Thibaut MERLIN -- PhD

Docteur en Imagerie Médicale au Laboratoire de Traitement de l'Information Medicale (LaTIM - INSERM UMR 1101)
Institut Brestois de recherche en Bio-Santé (IBRBS)
12 Avenue Foch, 29200 Brest, FRANCE
Tel: 06.75.12.24.90

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