How to separate segments of a VMAT field as independant static fields ?

[Nicolas Boussion]

Hello,

I am looking for a way to separate the segments (control points) of a VMAT or IMRT field as a set of independant static fields.

For example, if I have a single VMAT arc composed of 23 "static" control points, the objective would be to separate it as 23 static fields.

Do you know if this is possible with Pinnacle ?

Thank you very much for your help !

Nicolas B.
CHRU BREST-France.

[Timothee Ruef]

Hello,

It's clearly possible. I already made a script for this purpose and i can share it with you if you want. I tested it for the Elekta MLCi machine.

The idea is to iterate over all CP, save the MU, gantry angle, coll angle, MLC positions and just apply these parameter to a new static beam.

Contact me if you want some help.

Timothee Ruef
Centre Leonard de Vinci
Douai, France

[Nigel Freeman]

Hi Timothee,

I would be very appreciative of a copy of your script. The purpose here for extracting this information is to evaluate historical beam use factors for bunker shielding assessments.

Regards,

Nigel Freeman

Medical Physics

Canberra Hospital

Australia

[Sarah Petersen]

Hi Timothee,

We would be interested in a copy of this script as well if you are still willing to share!

Thank you,

Sarah Gilson

Park Nicollet

St. Louis Park, MN

[Timothee Ruef]

Hi Sarah,

Just send me your mail in MP and I would be more than happy to help you.

[Aitang Xing]

Hi Timothee and all,

Could you send me the script for QA purpose?

Thanks a lot,

Aitang

[Timothee Ruef]

Of course. I did not get any feedback from the people I sent it to. So I guess it work well. Fell free to share it.

I aimed to do the inverse script, if someone already did it, I would be interested to have it ;)

[Sotirios Stathakis]

Hi Timothy,

The script the ARC-TO-STATIC script works to make each control point a static beam. I tried to work the ALLCPW0 but it gives errors. The error is that it is unable to create a name with more than one period. (points to line 22) do you happen to have a version that would collapse the Arcs?

Thanks

Sotiri Stathakis

[Vincent C. Daoust]

You could also try :

TrialList .Current .BeamList .Current .CPManager .MakeStaticQATrial = "";

Then on the new trial :

TrialList .Current .BeamList .#"*" .Gantry = 0;

To collapse all beams to 0°.

[胜文]

Hi:

    I had tried to separate segment from IMRT plan two years ago.when I meet this question,I try to change my code to suit the question,here are my codes.hope to take some benefit .

    Shengwen Hu

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______________________________________________________________________________________________

Shengwen Hu

Medical Physics Department ,Oncology Center.

Affiliate Hospital Of Guangdong Medical College

NO.57 South People Load ,Xiashan Distr ,Zhanjiang City ,Guangdong Province, RP.China.

Tel: +86 15876371089

 Email:shen...@163.com

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