[gate-users] Re: gate-users Digest, Vol 13, Issue 16

[steven staelens]

> Today's Topics:
>
>    1. Spatial blurring (Aur=E9lien Vasseur)
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Mon, 18 Apr 2005 15:41:39 +0000 (GMT)
> From: "Aur=E9lien Vasseur" <aurelien-vasseur at caramail.com>
> Subject: [gate-users] Spatial blurring
> To: "Gate mailing-list" <gate-users at lphe1pet1.epfl.ch>
> Message-ID: 10107221652025 at lycos-europe.com
> Content-Type: text/plain; charset="windows-1252"
>
> Dear GATE users,

Hi A.,

Did you see my answer passing by on your previous questions on this ?:

    Subject:

    Re: gate-users Digest, Vol 12, Issue 20
        Date:
              Thu, 07 Apr 2005 10:38:25 +0200

With regards to this mail:

The option of using the localPos is of course valid since the spatial
blurring was implemented a few years ago for monoblock SPECT detectors.  I
would believe the X and Y defitions are correct in that context, also for
localPosX,Y,Z.

best regards,

Steven

Steven Staelens, Ph.D.
Ghent University
ELIS Department
Proeftuinstraat 86
B-9000 Gent
tel.  +32 9 264 66 28
fax. +32 9 264 66 18
Steven.Staelens at ugent.be



>
>
> In the file $GATEHOME/src/GateSpblurring.cc, I can't
> understand the following lines (l.59 to 61):
>
>  G4double PxNew = G4RandG
> auss::shoot(Px,m_spresolution/2.35);
>  G4double PyNew = G4RandGauss::shoo
> t(Py,m_spresolution/2.35);
>  G4double PzNew = Pz;
>
> According to the ori
> entation of the axis, shouldn't this lines be as follow?:
>
>  G4double Px
> New = G4RandGauss::shoot(Px,m_spresolution/2.35);
>  G4double PyNew = Py;
>
>  G4double PzNew = G4RandGauss::shoot(Pz,m_spresolution/2.35);
>
> (Moreov
> er, why using GetGlobalPos() to get the position and not GetLocalPos(), i
> n order to applied the blurring?)
>
> Any explaination would be helpfull.
> Thanks.
>
> Aurelien Vasseur
>
> C est le moment de dynamiser votre boîte mai
> l en découvrant les offres CaraMail Max et Pro - http://www.caramail.com
>
> ------------------------------
>
> _______________________________________________
> gate-users mailing list
> gate-users at lphe1pet1.epfl.ch
> http://lphe1pet1.epfl.ch/mailman/listinfo/gate-users
>
> End of gate-users Digest, Vol 13, Issue 16
> ******************************************