Hi Dirk,
For voxel geometry we have the following files:
.inp -- as in all other FLUKA simulations, with or without voxels.
.mat -- a lookup table so that FLAIR may map your DICOM files to a .vxl file.
This table is what the medical physics community refers to as the 'conversion
ramp'.
.vxl -- generated automatically by FLAIR for us, although in principle one can
still generate this manually without FLAIR's help, the painful way, in which
case .mat would not be necessary.
The material.inp which comes with the standard FLAIR distribution contains the
MATERIAL and COMPOUND cards only. Therefore, it is only an excerpt. It is not
yet the complete .inp ready for a FLUKA run. We can see that each SDUM in the
MATERIAL card corresponds to an entry in the second column of .mat.
Did you get a newly created file with, .vxl extension, in your directory? Organ
and voxel-regions numbers are embedded in .vxl. If we let FLAIR does the
conversion for us, these are nothing we need to worry about. We just need to
specify the name of the .vxl file as SDUM for the VOXELS card in .inp.
:) mary
> On 24 March 2015 at 09:57 "Bartkoski,Dirk Alan" <DABartkoski_at_mdanderson.org>
> wrote:
>
>
> I have been trying to import CT DICOM images using flair. I can import them
> and look at the slices. I have opened the head.mat and material.inp example
> files. There are a few things I do not understand about the process as
> explained in the online "Voxel and Medical Applications" slides.
>
>
>
> 1. I do not understand the meaning of "voxel-region number". In the .mat file
> you specify the HU value ranges that belong to each material that is specified
> in the material.inp file. I do not where or how the voxel-region number is
> supposed to be assigned.
>
>
>
> 2. flair is supposed to generate regions based on the organ number. This does
> not happen. I assume it because I can't figure out how to assign organ
> numbers.
>
>
>
> Any clarity or direction to additional tutorial resources or examples would
> be most appreciated.
>
>
>
>
> ---------------------------------------------
>
> Dirk A. Bartkoski, Ph.D.
>
> Postdoctoral Fellow | Radiation Physics
>
> [MDACC Logo]
>
> Mays Clinic (ACBP1.2972.1)
>
> 1515 Holcombe Blvd., Unit 1202
>
> Houston, TX 77030
>
> (713) 745-8124 Office | (865) 310-7349 Mobile
>
> dabartkoski_at_mdanderson.org <mailto:dabartkoski_at_mdanderson.org>
>
>
>
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Received on Wed Mar 25 2015 - 00:36:06 CET