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Forum: Geometry
Re: None Speed Difference between Parameterised and Replica? (Ryan)
Re: None Re: Speed Difference between Parameterised and Replica? (John Apostolakis)
Date: 11 Jul, 2007
From: Ryan <oppo88@hotmail.com>

Thanks for the feedback. I've been wanting to ask about how to properly implement voxel phantoms.

I want to place a sphere of lead inside a cubic world volume, with the sphere diameter being 1/10 that of the world. What I want to see is the resulting 3D dose distrubution in the entire world volume.

What I did was use parallel geometry to define a 3d dose scoring grid. The grid is currently defined using parameterised volumes. It is not necessary to define a material for the grids because they are defined in the parallel world, and the grid will just take on any material in the real world.

So essentially, each voxel in the grid (parallel world) is the same, and like you said, it's better to implement it as replicas instead.

I'm glad you brought up the stepping problem. Due to the artifical voxels, the steps are stopped at the boundaries, which is as you mentioned, making my simulation take much longer.

Is there any way to score dose in the entire world volume without artificially placing scoring cells as grid? Or maybe there's a better to implement what I want to do?

Thanks

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1 None: Re: Speed Difference between Parameterised and Replica?   (John Apostolakis - 11 Jul, 2007)
1 None: Re: Speed Difference between Parameterised and Replica?   (Ryan - 11 Jul, 2007)
2 None: Re: Speed Difference between Parameterised and Replica?   (michel maire - 12 Jul, 2007)
1 None: Re: Speed Difference between Parameterised and Replica?   (Ryan - 12 Jul, 2007)
(_ None: Re: Speed Difference between Parameterised and Replica?   (michel maire - 12 Jul, 2007)
(_ None: Re: Speed Difference between Parameterised and Replica?   (Ryan - 13 Jul, 2007)
(_ None: Re: Speed Difference between Parameterised and Replica?   (John Apostolakis - 14 Jul, 2007)
(_ None: Re: Speed Difference between Parameterised and Replica?   (Ryan - 17 Jul, 2007)
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