[Gate-users] No Coincidences output

[山中 琢]

Thanks for the advice,

I tried a couple of adjustments with the attaching, sometimes it gives me
nothing, sometimes gives me singles, but still no coincidences.
So my problems seems to lie in the other parts.

Taku

2011/10/21 Jasper C <jaspercwork at gmail.com>

> Hi Taku,
>
> I'm my geometry, I have for example this:
>
> /gate/world/geometry/setXLength 1000.0 mm
> /gate/world/geometry/setYLength 1000.0 mm
> /gate/world/geometry/setZLength 1000.0 mm
>
> /gate/world/daughters/name              cylindricalPET
> /gate/world/daughters/insert            cylinder
> [set cylindricalPET attributes]
>
> /gate/cylindricalPET/daughters/name     axialUnit
> /gate/cylindricalPET/daughters/insert   box
> [set axialUnit attributes]
>
> /gate/axialUnit/daughters/name  blockUnit
> /gate/axialUnit/daughters/insert        box
> [set blockUnit attributes]
>
> and so on...  This is what I meant by daughters.  I found that if I
> did not attach all these elements with
>
> /gate/systems/cylindricalPET/rsector/attach     [object]
>
> I would get no results.
>
> But if you can get Singles ouptut, then maybe this is not the issue.
> Sorry that I can't be of more help.
>
> Best regards,
>
> JC
>
>
>
>
> 2011/10/20 山中 琢 <takuyama at med.hokudai.ac.jp>:
> > I have the Singles output in both the ASCII and ROOT outputs, but no
> > coincidences.
> > This is why I thought my singles output is working well but not for
> > coincidences.
> >
> > As for the systems, are you saying that you need to fill each systems to
> get
> > it to work?
> > Since my system is a two-head PET, it doesn't have many daughters.
> >
> > Still having only Singles...
> >
> > Taku
> >
> > 2011/10/20 Jasper C <jaspercwork at gmail.com>
> >>
> >> Hello,
> >>
> >> I'm a new user to GATE too, and I have a question.
> >>
> >> > I'm trying to get the output for the coincidences, but somehow it
> >> > doesn't
> >> > work at all.
> >> > I set the system as PETscanner, and the coincidence output flag as 1,
> so
> >> > it
> >> > should give me some coincidences, but the ASCIICoincidences.dat has
> >> > nothing
> >> > inside it, ROOT neither.
> >> > Singles output is working alright.
> >>
> >> How do you tell that singles output is working alright?  I would have
> >> thought that if you do have singles output, then this will go into the
> >> .root file?
> >>
> >> Also, I saw your earlier e-mail.  For my system I am using
> >> cylindricalPET, and I found that I must attach the complete hierarchy
> >> of the system for it to work.  So, for example I have:
> >>
> >> /gate/systems/cylindricalPET/rsector/attach     axialUnit
> >> /gate/systems/cylindricalPET/module/attach      blockUnit
> >> /gate/systems/cylindricalPET/crystal/attach     crystalUnit
> >> /gate/systems/cylindricalPET/layer0/attach      c1
> >> /gate/c1/attachCrystalSD
> >>
> >> Where c1 is a daughter of crystalUnit, crystalUnit is a daughter of
> >> blockUnit, blockUnit is a daughter of axialUnit, and finally axialUnit
> >> is a daughter of cylindricalPET.
> >>
> >> Of course if you can get singles events, then probably your problem is
> >> not in this part.
> >>
> >> Hope this is helpful...
> >>
> >> JC
> >>
> >>
> >>
> >>
> >> On 19 October 2011 14:44, 山中 琢 <takuyama at med.hokudai.ac.jp> wrote:
> >> > Hello Gaters,
> >> >
> >> > I'm trying to get the output for the coincidences, but somehow it
> >> > doesn't
> >> > work at all.
> >> > I set the system as PETscanner, and the coincidence output flag as 1,
> so
> >> > it
> >> > should give me some coincidences, but the ASCIICoincidences.dat has
> >> > nothing
> >> > inside it, ROOT neither.
> >> > Singles output is working alright.
> >> > My digitizer setup is as below.
> >> > What do I need to add to this?
> >> >
> >> > Thanks.
> >> >
> >> > Taku Yamanaka
> >> > ----
> >> > # DIGITIZER
> >> > /gate/digitizer/Singles/insert                adder
> >> > /gate/digitizer/Singles/insert                readout
> >> > /gate/digitizer/Singles/readout/setDepth    2 #9 for digitize PMT?
> >> >
> >> > # ENERGY BLURRING
> >> > /gate/digitizer/Singles/insert blurring
> >> > /gate/digitizer/Singles/blurring/setResolution            0.19
> >> > /gate/digitizer/Singles/blurring/setEnergyOfReference    511. keV
> >> >
> >> > # ENERGY WINDOW 350-600keV
> >> > /gate/digitizer/Singles/insert                        thresholder
> >> > /gate/digitizer/Singles/thresholder/setThreshold    10. keV
> >> >
> >> > # COINCIDENCE SORTER
> >> > /gate/digitizer/Coincidences/setWindow    50. ns
> >> > /gate/digitizer/Coincidences/MultiplesPolicy    takeAllGoods
> >> > /gate/digitizer/Coincidences/setDepth    2
> >> > _______________________________________________
> >> > Gate-users mailing list
> >> > Gate-users at lists.opengatecollaboration.org
> >> > http://lists.opengatecollaboration.org/mailman/listinfo/gate-users
> >> >
> >
> >
> >
> > --
> > 北海道大学 大学院 医学研究科 放射線医学分野 M2
> > 山中 琢
> > takuyama at med.hokudai.ac.jp
> > --
> >
> >
>



-- 
北海道大学 大学院 医学研究科 放射線医学分野 M2
山中 琢
takuyama at med.hokudai.ac.jp
--