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<TITLE>RE: [Gate-users] Re:a question about the ASCII output</TITLE>
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<P><FONT SIZE=2>OK.<BR>
<BR>
When Simon said "last one", I believe what he really mean is the hits for<BR>
"the last scattered photon".<BR>
<BR>
If you read GATE manual carefully, you will find the relationship between hit and single (pulse).<BR>
And also please refer to my comment sent two days ago in this list.<BR>
<BR>
To be simple to your question:<BR>
<BR>
Hits are left track for one single particle. How many hits a particle can have depends on the<BR>
definition of a paremater called "step (interaction) length", which, I believe, for gamma, e+,e-<BR>
in GATE default is 1 mm.<BR>
<BR>
GATE trys to collect hits information for one single particle (Are the incident and scattered photons<BR>
considered two particles? We are arguing it.) to output a Single. Those modules Simon mentioned are for<BR>
this purpose.<BR>
<BR>
Yu Chen, Ph.D.<BR>
University of Massachusetts Medical School<BR>
Division of Nuclear Medicine<BR>
55 Lake Avenue North<BR>
Worcester, MA 01655-0243<BR>
Phone: (508) 856-6123<BR>
Fax: (508) 856-4572<BR>
<BR>
<BR>
<BR>
-----Original Message-----<BR>
From: gate-users-bounces@lists.healthgrid.org on behalf of ???<BR>
Sent: Thu 12/13/2007 9:32 AM<BR>
To: gate-users@lists.healthgrid.org<BR>
Subject: [Gate-users] Re:a question about the ASCII output<BR>
<BR>
Dear Gate users:<BR>
<BR>
<BR>
Hi Guo Ning,<BR>
<BR>
What I will say is just a suggestion, I am not sure at all.<BR>
I think that between hits and singles the Adder, Readout and Blurring<BR>
modules of the digitizer are applied. So if your hits have scattered many<BR>
times in your crystal, I think the position, energy and time stamp mentioned<BR>
are for the last one. And so for your singles, there is a sort of average<BR>
applied by these modules that change the position, energy and time stamp.<BR>
>From the last column of your ascii hits file, you can see what is the last<BR>
volume where a scatter interaction has occurred. So maybe you could see<BR>
'crystal' for some. And those which have not scattered in the crystal are<BR>
maybe affected by the blurring effects (spatial, energy), if you have fixed<BR>
some in your digitizer. Am I clear ?? :-)<BR>
<BR>
Here is my ASCII file:<BR>
<BR>
gateHit.dat(eventID=8):<BR>
0 8 2 0 0 3 0 0 2166 0<BR>
1.94289893604197551552418e-04 0.000e+00 6.384e-01 3.913e+01 -1.005e+02 -<BR>
6.473e+01 22 2 0 1 0 0 compt NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289897769154044308154e-04 6.331e-02 1.951e-01 3.984e+01 -1.004e+02 -<BR>
6.576e+01 22 2 0 1 0 0 phot NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289897783141201010118e-04 5.267e-03 3.497e-03 3.984e+01 -1.004e+02 -<BR>
6.576e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289897797162049294592e-04 8.135e-03 3.497e-03 3.984e+01 -1.004e+02 -<BR>
6.576e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289897811239194776872e-04 5.032e-03 3.497e-03 3.984e+01 -1.004e+02 -<BR>
6.577e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289897825353853654320e-04 1.524e-03 3.497e-03 3.984e+01 -1.004e+02 -<BR>
6.577e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289897839480303230394e-04 7.025e-03 3.497e-03 3.984e+01 -1.004e+02 -<BR>
6.577e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289897853663808945796e-04 4.613e-03 3.497e-03 3.984e+01 -1.004e+02 -<BR>
6.577e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289897867887267511253e-04 2.683e-03 3.497e-03 3.984e+01 -1.004e+02 -<BR>
6.578e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289897882122354145010e-04 4.709e-03 3.497e-03 3.984e+01 -1.004e+02 -<BR>
6.578e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289897896377119048197e-04 4.396e-03 3.497e-03 3.984e+01 -1.004e+02 -<BR>
6.578e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289897910652375372445e-04 7.532e-03 3.497e-03 3.984e+01 -1.004e+02 -<BR>
6.578e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289897924967611651803e-04 2.612e-03 3.497e-03 3.983e+01 -1.004e+02 -<BR>
6.577e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289897939298243602010e-04 6.208e-04 3.497e-03 3.983e+01 -1.004e+02 -<BR>
6.577e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289897953632670259821e-04 3.466e-03 3.497e-03 3.983e+01 -1.004e+02 -<BR>
6.577e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289897967989024906571e-04 1.244e-03 3.497e-03 3.983e+01 -1.004e+02 -<BR>
6.577e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289897982353673699940e-04 4.603e-03 3.497e-03 3.982e+01 -1.004e+02 -<BR>
6.577e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289897999024203673751e-04 6.236e-03 4.141e-03 3.982e+01 -1.004e+02 -<BR>
6.577e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289898015736014645280e-04 1.284e-03 4.141e-03 3.982e+01 -1.004e+02 -<BR>
6.576e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289898032457149755492e-04 5.766e-03 4.141e-03 3.982e+01 -1.004e+02 -<BR>
6.576e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289898049223496096297e-04 3.681e-03 4.141e-03 3.981e+01 -1.004e+02 -<BR>
6.576e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289898066021772191081e-04 4.852e-03 4.141e-03 3.981e+01 -1.004e+02 -<BR>
6.576e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289898094689188938824e-04 2.331e-02 8.377e-03 3.981e+01 -1.004e+02 -<BR>
6.576e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289898122330679380854e-04 1.651e-02 8.377e-03 3.980e+01 -1.004e+02 -<BR>
6.577e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289898149366724224713e-04 1.791e-02 8.377e-03 3.980e+01 -1.004e+02 -<BR>
6.577e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289898174807257151542e-04 1.042e-02 8.377e-03 3.980e+01 -1.004e+02 -<BR>
6.576e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289898199465673736194e-04 3.237e-02 8.377e-03 3.980e+01 -1.004e+02 -<BR>
6.576e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289898219553744482951e-04 1.586e-02 8.377e-03 3.980e+01 -1.004e+02 -<BR>
6.576e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289898236630335275413e-04 2.895e-02 8.377e-03 3.980e+01 -1.004e+02 -<BR>
6.576e+01 11 4 2 1 0 0 msc NULL NULL<BR>
0 8 2 0 0 3 0 0 2056 0<BR>
1.94289898247083291050671e-04 5.244e-02 1.160e-02 3.980e+01 -1.004e+02 -<BR>
6.576e+01 11 4 2 1 0 0 eIoni NULL NULL<BR>
0 8 2 0 0 3 0 0 2166 0<BR>
1.94289893644813472552146e-04 1.646e-01 7.593e-02 3.913e+01 -1.005e+02 -<BR>
6.473e+01 11 3 2 1 0 0 eIoni NULL NULL<BR>
0 8 1 0 0 1 0 0 9976 0<BR>
1.94289896757153258402204e-04 0.000e+00 1.584e+00 -3.943e+01 1.013e+02<BR>
6.522e+01 22 1 0 2 0 0 compt NULL NULL<BR>
0 8 1 0 0 1 0 0 9866 0<BR>
1.94289921437981955368302e-04 6.331e-02 1.287e+00 -3.888e+01 1.083e+02<BR>
6.311e+01 22 1 0 2 0 0 phot NULL NULL<BR>
0 8 1 0 0 1 0 0 9866 0<BR>
1.94289921523046126786843e-04 3.001e-01 1.905e-01 -3.888e+01 1.084e+02<BR>
6.312e+01 11 6 1 2 0 0 eIoni NULL NULL<BR>
0 8 1 0 0 1 0 0 9976 0<BR>
1.94289896792361748171715e-04 1.475e-01 6.387e-02 -3.943e+01 1.013e+02<BR>
6.523e+01 11 5 1 2 0 0 eIoni NULL NULL<BR>
<BR>
gateCoincidences.dat(eventID=8)<BR>
0 8 0 0.000e+00 0.000e+00 0.000e+00 1.94289835264527705220236e-04<BR>
4.980e-01 3.982e+01 -1.004e+02 -6.576e+01 0 3 0 0 2056<BR>
0 0 1 0 0 0.000e+00 0.000e+00 0 8 0<BR>
0.000e+00 0.000e+00 0.000e+00 1.94289803915617990352077e-04 5.013e-01 -<BR>
3.888e+01 1.084e+02 6.312e+01 0 1 0 0 9866 0 0<BR>
1 0 0 0.000e+00 0.000e+00<BR>
<BR>
Obviously, the position, energy and time stamp mentioned are not for the<BR>
last hit.<BR>
Can anyone tell me the intrinsic relationship of this, thanks for your<BR>
attention.<BR>
<BR>
</FONT>
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