[Gate-users] How to open GATE output files

[David Boersma]

Hi Suzanne,

ROOT files should not be opened with GATE, but with the ROOT program. If 
you managed to compile GATE and produce ROOT files, then I assume that 
your shell environment is set up so that ROOT is in your PATH. Or if you 
are using vGate, then this should also case. You start root by opening a 
terminal and typing

root -l

(The -l flag is to avoid an annoying splash screen.)

Then at the ROOT prompt you type e.g.:

new TBrowser;

which should open a new window with lots of stuff in it. On the left 
side of that window you should see some directory tree, in which you 
should be able to navigate to your ROOT output file, and then open it. I 
don't know what exactly is saved in CT simulation output, I am in a 
different business, but hopefully the results are nicely plottable in 
the TBrowser. And if not, then the TBrowser should still help you to 
figure out what kind of objects are stored in any given ROOT file.

Once you figured out with the browser what actions to perform with CT 
root files, you can do those actions (and a lot more) also in a script 
(a "root macro"). A script is useful if you run lots of simulations, it 
would be tedious to perform the same GUI actions on every output file.

ROOT is a pretty big program (and a framework for other programs) that 
was originally developed for doing high energy particle physics at CERN. 
It could be useful to spend some time with the ROOT User Guide and some 
tutorials at root.cern.ch. Be careful not to drown in the information. 
Maybe other people doing CT simulation can help you with some example 
scripts.

HTH,
David


Den 28/09/2015 kl. 20:11, skrev surabhi balagopal nair:
> Hello All,
>
> I am trying to simulate a model of CTscanner in Gate. The codes run
> successfully without any errors and outputs 1 .root file and 4 .dat
> files. The dat files are the ImageCT outputs mentioned in the GATE user
> guide. However, I am not able to open any of these files. I tried
> opening the dat file using ImageJ (File>Import>Raw) but it opens a black
> window with no images.
>
> If anyone could help me with these (how to open both root and dat
> files), I would be very grateful.
>
> Thank you,
> Suzanne
>
>
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