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Forum: Medical Applications
Re: None can I use ROOT analysis instead of AIDA? (Morad Hamad)
Date: 26 Sep, 2009
From: G.A.P.Cirrone <G.A.P.Cirrone>

Dear Morad Hamad,

AIDA is collection of external libraries permitting an User to create output files (.hbook, .root, etc).
Installation documentation is not complete but we provided a document helping to install AIDA starting from the Open Scientist distribution.
The document is yet in Italian (I promised to translate it before the end of the year ....) but probably you can easily follow the necessary steps for the AIDA installation.  It can be found here:

It is, of course, not necessary install the AIDA to retrieve outputs from your simulation and, if you'd like to directly use the ROOT libraries, you can proceed with the following steps:

1. You can create a dedicated eviroment variable (i.e. G4ANALISYS_USE_ROOT) that point on the ROOT libraries
2. you must include the necessary packages in your code:

#include "TROOT.h"
#include "TFile.h"
#include "TH1D.h"

3. then you can proceed with the normal ROOT syntax to produce your histograms or ntuple.
For example:
histType = "root";
ROOT_file = new TFile(name, "RECREATE", "ROOT file");
ROOT_histo = new TH1D(options);

etc ...... etc ....


Alternatively you can easily generate simple ASCII file.

In hadrontherapy, for example, this functionality is provided in the new version that you can download in the new Geant4 9.3 Beta version: download the Geant4 9.3 Beta version, than go to the examples/advanced/Hadrontherapy/src/ class file.
Inside it you can find how a DoseDistribution.out file is easily generated.

Also check this new version of Hadrontherapy as it has many improvements.

Feel free to ask for any problem,
Pablo Cirrone

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