[Castor-users] [Castor-devel] Fwd: Re: TR: SPECT reading Interfile

[Michael Ljungberg]

OK but then it does not match what you suggested previously

Then, first subset will contain Mat(i=0,j=0,k=0), Mat(i=0,j=0,k=N), Mat(i=0,j=0,k=2*N), … and the resulting subsets will be better balanced.

Hälsningar / Best regards

Michael

From: Castor-users <castor-users-bounces at lists.castor-project.org> on behalf of COMTAT Claude <claude.comtat at cea.fr>
Date: Wednesday, 26 April 2017 at 12:05
To: "castor-users at lists.castor-project.org" <castor-users at lists.castor-project.org>
Subject: Re: [Castor-users] [Castor-devel] Fwd: Re: TR: SPECT reading Interfile

Remove the loop on the subsets, and try again:


         Do J=1,mtxsizJ
          Do I=1,mtxsizI
           Do K=1,AllAngles

           I1=I
           J1=J
           K1=(K-1)

           Write(1) ITime,Mat(i1,j1,k1),
     *     (K1-1),MtxsizI*(J1-1)+(I1-1)

           EndDo
          EndDo
         EndDo



De : Castor-devel [mailto:castor-devel-bounces at lists.castor-project.org] De la part de Carlier Thomas
Envoyé : mercredi 26 avril 2017 11:02
À : castor-devel at lists.castor-project.org
Objet : [Castor-devel] Fwd: Re: [Castor-users] TR: SPECT reading Interfile


Je regarde quand j'aurai le temps... Si certains veulent se lancer avant => pas de soucis !



Thomas


-------- Message transféré --------
Sujet :

Re: [Castor-users] TR: SPECT reading Interfile

Date :

Wed, 26 Apr 2017 08:59:17 +0000

De :

Michael Ljungberg <michael.ljungberg at med.lu.se><mailto:michael.ljungberg at med.lu.se>

Pour :

Carlier Thomas <thomas.carlier at chu-nantes.fr><mailto:thomas.carlier at chu-nantes.fr>





Note that I have written a conversion program from SPECT interfiles too castor format. According to our discussions I create the *.cdf file from the fortran loop

        Do M=1,Subsets
         Do J=1,mtxsizJ
          Do I=1,mtxsizI
           Do K=1,IAngles

           I1=I
           J1=J
           K1=(K-1)*Subsets+M

           Write(1) ITime,Mat(i1,j1,k1),
     *     (K1-1),MtxsizI*(J1-1)+(I1-1)

           EndDo
          EndDo
         EndDo
        EndDo

I hope this is write. Here is a zip file with the projections and the reconstructed images (three iterations and data organised in 16 subsets)

https://www.dropbox.com/s/bjvtvs7sy17skmv/castor.zip?dl=0


Hälsningar / Best regards

Michael

From: Castor-users <castor-users-bounces at lists.castor-project.org><mailto:castor-users-bounces at lists.castor-project.org> on behalf of Carlier Thomas <thomas.carlier at chu-nantes.fr><mailto:thomas.carlier at chu-nantes.fr>
Date: Wednesday, 26 April 2017 at 10:26
To: "castor-users at lists.castor-project.org"<mailto:castor-users at lists.castor-project.org> <castor-users at lists.castor-project.org><mailto:castor-users at lists.castor-project.org>
Subject: Re: [Castor-users] TR: SPECT reading Interfile


Dear Michael,



Would it be possible to send us your projections and your log file for this reconstruction?

We will investigate the problem with your data because we did not experience such artifacts.

Thanks



Thomas

Le 26/04/2017 à 07:57, Michael Ljungberg a écrit :
Hi Claude and others

I finally got it working for osem. Thank you for all help. I have noticed that when using a relatively low angles/subset there appear artefacts in the images that is constant in position though out the number of slices. The example is for 8 angles/subsets.  I will investigate effect this a little bit more. Is there any one that has seen this before?

Hälsningar / Best regards

Michael







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