[Castor-users] Attenuation correction for PET image

[STUTE Simon]

Yes right, sorry !

Simon


________________________________
De : Castor-users <castor-users-bounces at lists.castor-project.org> de la part de tmerlin <Thibaut.Merlin at univ-brest.fr>
Envoyé : lundi 20 janvier 2020 15:22
À : castor-users at lists.castor-project.org
Objet : Re: [Castor-users] Attenuation correction for PET image


Hi,


Just to add to Simon's answer:


If you only recovered true coincidences from the GATE simulation data, and if you are using list-mode data, then with the -atn option you can provide an (interfile) image containing the attenuation coefficient value (in cm-1) to correct for attenuation during reconstruction. Attenuation correction factors will be used as multiplicative correction factors during the computation of the sensitivity image (which is calculated first when you launch the reconstruction), so the sensitivity image will include correction for attenuation.


Best,

Thibaut



On 20/01/2020 10:27, STUTE Simon wrote:

Hi,


I may be wrong but Chang's method is for SPECT.


For PET, you have to compute the attenuation correction factor for each event also, and add this information in the datafile.


Simon


________________________________
De : Castor-users <castor-users-bounces at lists.castor-project.org><mailto:castor-users-bounces at lists.castor-project.org> de la part de ??? <dusrud026 at gmail.com><mailto:dusrud026 at gmail.com>
Envoyé : lundi 20 janvier 2020 09:43
À : castor-users at lists.castor-project.org<mailto:castor-users at lists.castor-project.org>; Thibaut Merlin
Cc : Yong Choi
Objet : [Castor-users] Attenuation correction for PET image

Dear CASToR users

I obtained the image of the GATE simulation data using the castor program.

I would like to ask the confusing part of applying the attenuation correction to the acquired image. The data is list mode.

if I enter the same image as the phantom size with attenuation coefficient value into the -atn option, will the attenuation factor be calculated within the caster program's code and corrected for the image?

If the method described above is correct, does the program use the method of Chang's multiplicative?

Any help I would really appreciate it.

Best regards
--

YEONKYEONG KIM

Molecular Imaging Research&Education Laboratory (MIRE Lab)
Department of Electronic Engineering,Sogang University

803, Ricci Hall(R 803), Sogang University
35 Baekbeom-ro, Mapo-gu, Seoul, South Korea 04107
Mobile : +82-10-9996-3644
Email : dusrud026 at gmail.com<mailto:dusrud026 at gmail.com>





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--
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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