[Gate-users] Re:a question about the ASCII output
Chen, Yu
Yu.Chen at umassmed.edu
Thu Dec 13 16:10:29 CET 2007
OK.
When Simon said "last one", I believe what he really mean is the hits for
"the last scattered photon".
If you read GATE manual carefully, you will find the relationship between hit and single (pulse).
And also please refer to my comment sent two days ago in this list.
To be simple to your question:
Hits are left track for one single particle. How many hits a particle can have depends on the
definition of a paremater called "step (interaction) length", which, I believe, for gamma, e+,e-
in GATE default is 1 mm.
GATE trys to collect hits information for one single particle (Are the incident and scattered photons
considered two particles? We are arguing it.) to output a Single. Those modules Simon mentioned are for
this purpose.
Yu Chen, Ph.D.
University of Massachusetts Medical School
Division of Nuclear Medicine
55 Lake Avenue North
Worcester, MA 01655-0243
Phone: (508) 856-6123
Fax: (508) 856-4572
-----Original Message-----
From: gate-users-bounces at lists.healthgrid.org on behalf of ???
Sent: Thu 12/13/2007 9:32 AM
To: gate-users at lists.healthgrid.org
Subject: [Gate-users] Re:a question about the ASCII output
Dear Gate users:
Hi Guo Ning,
What I will say is just a suggestion, I am not sure at all.
I think that between hits and singles the Adder, Readout and Blurring
modules of the digitizer are applied. So if your hits have scattered many
times in your crystal, I think the position, energy and time stamp mentioned
are for the last one. And so for your singles, there is a sort of average
applied by these modules that change the position, energy and time stamp.
>From the last column of your ascii hits file, you can see what is the last
volume where a scatter interaction has occurred. So maybe you could see
'crystal' for some. And those which have not scattered in the crystal are
maybe affected by the blurring effects (spatial, energy), if you have fixed
some in your digitizer. Am I clear ?? :-)
Here is my ASCII file:
gateHit.dat(eventID=8):
0 8 2 0 0 3 0 0 2166 0
1.94289893604197551552418e-04 0.000e+00 6.384e-01 3.913e+01 -1.005e+02 -
6.473e+01 22 2 0 1 0 0 compt NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289897769154044308154e-04 6.331e-02 1.951e-01 3.984e+01 -1.004e+02 -
6.576e+01 22 2 0 1 0 0 phot NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289897783141201010118e-04 5.267e-03 3.497e-03 3.984e+01 -1.004e+02 -
6.576e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289897797162049294592e-04 8.135e-03 3.497e-03 3.984e+01 -1.004e+02 -
6.576e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289897811239194776872e-04 5.032e-03 3.497e-03 3.984e+01 -1.004e+02 -
6.577e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289897825353853654320e-04 1.524e-03 3.497e-03 3.984e+01 -1.004e+02 -
6.577e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289897839480303230394e-04 7.025e-03 3.497e-03 3.984e+01 -1.004e+02 -
6.577e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289897853663808945796e-04 4.613e-03 3.497e-03 3.984e+01 -1.004e+02 -
6.577e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289897867887267511253e-04 2.683e-03 3.497e-03 3.984e+01 -1.004e+02 -
6.578e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289897882122354145010e-04 4.709e-03 3.497e-03 3.984e+01 -1.004e+02 -
6.578e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289897896377119048197e-04 4.396e-03 3.497e-03 3.984e+01 -1.004e+02 -
6.578e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289897910652375372445e-04 7.532e-03 3.497e-03 3.984e+01 -1.004e+02 -
6.578e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289897924967611651803e-04 2.612e-03 3.497e-03 3.983e+01 -1.004e+02 -
6.577e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289897939298243602010e-04 6.208e-04 3.497e-03 3.983e+01 -1.004e+02 -
6.577e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289897953632670259821e-04 3.466e-03 3.497e-03 3.983e+01 -1.004e+02 -
6.577e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289897967989024906571e-04 1.244e-03 3.497e-03 3.983e+01 -1.004e+02 -
6.577e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289897982353673699940e-04 4.603e-03 3.497e-03 3.982e+01 -1.004e+02 -
6.577e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289897999024203673751e-04 6.236e-03 4.141e-03 3.982e+01 -1.004e+02 -
6.577e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289898015736014645280e-04 1.284e-03 4.141e-03 3.982e+01 -1.004e+02 -
6.576e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289898032457149755492e-04 5.766e-03 4.141e-03 3.982e+01 -1.004e+02 -
6.576e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289898049223496096297e-04 3.681e-03 4.141e-03 3.981e+01 -1.004e+02 -
6.576e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289898066021772191081e-04 4.852e-03 4.141e-03 3.981e+01 -1.004e+02 -
6.576e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289898094689188938824e-04 2.331e-02 8.377e-03 3.981e+01 -1.004e+02 -
6.576e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289898122330679380854e-04 1.651e-02 8.377e-03 3.980e+01 -1.004e+02 -
6.577e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289898149366724224713e-04 1.791e-02 8.377e-03 3.980e+01 -1.004e+02 -
6.577e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289898174807257151542e-04 1.042e-02 8.377e-03 3.980e+01 -1.004e+02 -
6.576e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289898199465673736194e-04 3.237e-02 8.377e-03 3.980e+01 -1.004e+02 -
6.576e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289898219553744482951e-04 1.586e-02 8.377e-03 3.980e+01 -1.004e+02 -
6.576e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289898236630335275413e-04 2.895e-02 8.377e-03 3.980e+01 -1.004e+02 -
6.576e+01 11 4 2 1 0 0 msc NULL NULL
0 8 2 0 0 3 0 0 2056 0
1.94289898247083291050671e-04 5.244e-02 1.160e-02 3.980e+01 -1.004e+02 -
6.576e+01 11 4 2 1 0 0 eIoni NULL NULL
0 8 2 0 0 3 0 0 2166 0
1.94289893644813472552146e-04 1.646e-01 7.593e-02 3.913e+01 -1.005e+02 -
6.473e+01 11 3 2 1 0 0 eIoni NULL NULL
0 8 1 0 0 1 0 0 9976 0
1.94289896757153258402204e-04 0.000e+00 1.584e+00 -3.943e+01 1.013e+02
6.522e+01 22 1 0 2 0 0 compt NULL NULL
0 8 1 0 0 1 0 0 9866 0
1.94289921437981955368302e-04 6.331e-02 1.287e+00 -3.888e+01 1.083e+02
6.311e+01 22 1 0 2 0 0 phot NULL NULL
0 8 1 0 0 1 0 0 9866 0
1.94289921523046126786843e-04 3.001e-01 1.905e-01 -3.888e+01 1.084e+02
6.312e+01 11 6 1 2 0 0 eIoni NULL NULL
0 8 1 0 0 1 0 0 9976 0
1.94289896792361748171715e-04 1.475e-01 6.387e-02 -3.943e+01 1.013e+02
6.523e+01 11 5 1 2 0 0 eIoni NULL NULL
gateCoincidences.dat(eventID=8)
0 8 0 0.000e+00 0.000e+00 0.000e+00 1.94289835264527705220236e-04
4.980e-01 3.982e+01 -1.004e+02 -6.576e+01 0 3 0 0 2056
0 0 1 0 0 0.000e+00 0.000e+00 0 8 0
0.000e+00 0.000e+00 0.000e+00 1.94289803915617990352077e-04 5.013e-01 -
3.888e+01 1.084e+02 6.312e+01 0 1 0 0 9866 0 0
1 0 0 0.000e+00 0.000e+00
Obviously, the position, energy and time stamp mentioned are not for the
last hit.
Can anyone tell me the intrinsic relationship of this, thanks for your
attention.
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