Re: [fluka-discuss]: modulator wheel in proton radiotherapy

From: Mohammad Islam <rafiqul.islam_at_okstate.edu>
Date: Tue, 17 Jun 2014 20:19:21 -0600

Dear Vasilis,

Thank you very much for you help.
I am currently working as per your suggestion. One quick question:
where would I get CALL NM2BDY('name....', ID, IERR) and CALL
RSTBDY(ID, BODYTYPE, WHAT, NWHAT) routines. And where to use them. Any
example would be a great help. Thanks.

Rafiq

On Mon, Jun 16, 2014 at 1:51 AM, Vasilis Vlachoudis
<Vasilis.Vlachoudis_at_cern.ch> wrote:
> Hi Mohamad,
>
> it is possible to introduce a rotating wheel in your simulations. It will be treated as a moving body.
> You will have to modify its parameters (on the bodies that they describe it) during run time, most
> preferable with in a custom source routine. For every new particle you change the location of the wheel.
>
> However (even recommended) If you feel uncomfortable with user routines, then the easiest and safest
> way would be to make multiple simulations with various geometries. You can use
> #define VAR value
> to define variables and make a "dynamic" geometry. Using the flair ability to make muliple
> runs by tweaking the variables value you simulate several setups. Check the "loop" function.
>
> If you wish to modify a bodies parameter you need the following routines:
>
> * To get the body id (very slow, save the return value, to avoid multiple calls)
> CALL NM2BDY('name....', ID, IERR)
>
> * To reset the body parameters
> CALL RSTBDY(ID, BODYTYPE, WHAT, NWHAT)
>
> Body types:
> ARB 1
> SPH 2
> RCC 3
> REC 4
> TRC 5
> ELL 6
> BOX 7
> WED 8
> RPP 9
> ZCC 10
> ZEC 11
> XYP 12
> XZP 13
> YZP 14
> PLA 15
> XCC 16
> XEC 17
> YCC 18
> YEC 19
> QUA 20
> END 21
>
> Vasilis
>
> ________________________________________
> From: owner-fluka-discuss_at_mi.infn.it [owner-fluka-discuss_at_mi.infn.it] on behalf of Mohammad Islam [rafiqul.islam_at_okstate.edu]
> Sent: 15 June 2014 07:01
> To: fluka-discuss_at_fluka.org
> Subject: [fluka-discuss]: modulator wheel in proton radiotherapy
>
> Dear fluka users,
>
> I have a question:
> In proton radiotherapy, a range modulator wheel is usually used to
> produce the desired spread out Bragg peak (SOBP). Roughly, the range
> modulator wheel rotates when the beam is on and produces the SOBP. My
> question is can I introduce a rotating wheel in the input file, i.e
> the beam will pass through a rotating wheel of particular speed. Is it
> possible to do in FLUKA? I would appreciate any suggestion.
>
> I want to mention that the effect of the modulation wheel can be
> produced in some other ways without physically introducing the
> modulator wheel. But I am interested if a rotating wheel can be
> directly placed in the input.
>
> Thanks
> Rafiq
>
Received on Wed Jun 18 2014 - 05:33:33 CEST