[Gate-users] No Coincidences output

[Jasper C]

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
> --
>
>