[gate-users] cylindricalPET

[Yun Dong]

Thanks. I just misunderstood what you said. Thank you.

Yun

----- Original Message -----
From: Fernando Rannou <rannou at diinf.usach.cl>
Date: Tuesday, July 19, 2005 9:56 am
Subject: Re: [gate-users] cylindricalPET

> a setting of 1 will give you valid coincidences. It means
> that if one single hits detector (rsector) 0 and the other 
> single hits detector 1 then it is valid coincidence. And also
> greater differences will be valid. 
> 
> Block is rsector in cylindricalPET.
> 
> Fernando
> 
> 
> On Tue, 2005-07-19 at 13:51 -0600, Yun Dong wrote:
> > Thanks Yuxuan and Fernando. Just now I set the 
> minSectorDifference as 
> > 1, then I got the coincidence output file. But as what Fernando 
> said, 
> > coincidences under setting 1 are maybe not valid. I feel 
> confused 
> > about this configure. What's "block" mean? Does its meaning 
> depend on 
> > the setting of "readout/setDepth"? Thanks.
> > 
> > Yun
> > 
> > ----- Original Message -----
> > From: Fernando Rannou <rannou at diinf.usach.cl>
> > Date: Tuesday, July 19, 2005 9:20 am
> > Subject: Re: [gate-users] cylindricalPET
> > 
> > > That's pretty good.  I actually found that there is a typo
> > > in the User's guide on page 96. The coincidences will be valid
> > > if the difference in block numbers is greater than or equal to 2,
> > > not just greater than. Because otherwise if you set to 1 you
> > > would still not get any coincidences and a value of 0 is not
> > > allowed.
> > > 
> > > Fernando
> > > 
> > > 
> > > On Tue, 2005-07-19 at 13:43 -0500, 
> yuxuan.zhang at di.mdacc.tmc.edu 
> > > wrote:> 
> > > > Hi, 
> > > > 
> > > > I think this is because you only have two rsectors defined 
> in the
> > > > cylindricalPET system. 
> > > > And for the coincidences sort, it will reject the 
> coincidencs 
> > > between> neighbour rsectors. 
> > > > you should change the vaule by set: 
> > > > /gate/digitizer/Coincidences/minSectorDifference [number] 
> > > > The default [number] is 2. and for your system, the [number] 
> > > should be
> > > > 1. 
> > > > 
> > > > See the manual  8.2.13. Coincidences sorter. 
> > > > 
> > > > 
> > > > yuxuan 
> > > > 
> > > > 
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