[Castor-users] how to write attenuation image header file

[poseidon_zhao]

Thank you Simon for so quick answer,  I will have a try.


Xin Zhao
 
 
------------------ Original ------------------
From:  "simon.stute"<simon.stute at chu-nantes.fr>;
Date:  Wed, Jun 1, 2022 06:10 PM
To:  "castor-users"<castor-users at lists.castor-project.org>; "zhaoxin"<zhaoxin at szbl.ac.cn>; 

Subject:  Re: [Castor-users] how to write attenuation image header file

 

 
Hi,
 

 
 
The header is the same as for images coming out from CASToR. You can use one of these as a template.
 

 
 
Simon
 

 
  
 De : Castor-users <castor-users-bounces at lists.castor-project.org> de la part de 赵鑫 <zhaoxin at szbl.ac.cn>
 Envoyé : mercredi 1 juin 2022 11:48
 À : castor-users
 Objet : [Castor-users] how to write attenuation image header file  
 
    
 Dear CASToR developers and users,
 
   I have been facing an issue with attenuation when trying to reconstruct a PET image from GATE simulation data, and my simulation item is a 200mm-diameter water cylinder. As shown in the attachment: "clinder.png", obvious attenuations can be seen in the recon  image, so I need to apply attenuation correction by providing the MuMap file with the help of "-atn XXX" in castor-recon.
 
   I have already obtained MuMap file ("BrainPET_atn_Water-MuMap.raw" in attachment) and its header ("BrainPET_atn_Water-MuMap.mhd") from MuMapActor in GATE. submitted the header file into castor-recon using the following commands: "castor-recon -df /home/castor/workDir/Cdf/Clinder_b2b_WaterPhantom.Cdh  -atn /home/castor/workDir/atn/BrainPET_atn_Water-MuMap.mhd   -opti MLEM -it 10:9 -proj joseph -conv gaussian,1.7,1.7,3::psf  -dim 630,630,40  -vox 0.3225,0.32255,0.3225   -dout /home/castor/workDir/img/waterClinder_forAttenuation -th 0"
 
   But errors were shown on screen, as provided in the attachment: "output.png". I guess it is because I did not offer the image header file in the correct format as CASToR required. Can anyone tell me where can I find an example of attenuation image header  file, so I can write the MuMap header correctly.
 
 Best regards
 
 Xin Zhao
 
 
 
 
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  BrainPET_atn_Water-MuMap.raw[60.6MB]‍ 
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