Re: [fluka-discuss]: how to update head.mat and material.inp

From: Wioletta Kozlowska <wioletta.kozlowska_at_cern.ch>
Date: Mon, 11 Apr 2016 18:35:18 +0200

Dear Sumaira,

material.inp is the file with the predefined FLUKA materials for different tissues. If you take for example

* MIXTURE : HU<1500
MATERIAL 1.8748080 0.HU<1500
COMPOUND -0.036 HYDROGEN -0.165 CARBON -0.042 NITROGENHU<1500
COMPOUND -0.432 OXYGEN -0.001 SODIUM -0.100 PHOSPHOHU<1500
COMPOUND -0.003 SULFUR -0.002 MAGNESIU -0.219 CALCIUMHU<1500

* MIXTURE : HU<1600
MATERIAL 1.9340080 0.HU<1600
COMPOUND -0.034 HYDROGEN -0.155 CARBON -0.042 NITROGENHU<1600
COMPOUND -0.435 OXYGEN -0.001 SODIUM -0.103 PHOSPHOHU<1600
COMPOUND -0.003 SULFUR -0.002 MAGNESIU -0.225 CALCIUMHU<160

the material HU<1600 refers to regions with HU belonging to <1500;1600) interval. The density (1.9340080) refers to the density at the center of this HU interval. Compound is just composition of the tissue. You shall redefine this database depending on your needs.

head.mat (or body.mat) is the file, where you can determine correction factors for density and dE/dx, taking into account your TPS correction factors for minimum and maximum ranges of the HU intervals.

If, for example, region HU=1599 rho is 2.0 and region HU=1500 rho=1.9. You shall determine Crho_min as ~0.9824 and Crho_max as ~1.0341. Additional calibration information you shall fill for the dE/dx values. Remember that CdEdx_rel is the relative value.

Last important information - lower/upper limit of the correction factors range is restricted to the interval [2/3,3/2].

Cheers,
Wioletta


>
>
> Dear Fluka Experts,
> I am new to use flair and really need to know about few important things to create most precise input. I have some dicom images of bone. can you please teach me the proper way to update the head.mat and material.inp files to assign the following material to my bone phantom,
> AIR, TRABECULAR BONE, water.
> can you please explain me the procedure to update these files by applying the calibration curves.
> if possible with examples please.
> I will be thankful to you.
> Regards,
> Sumaira



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Received on Mon Apr 11 2016 - 20:11:28 CEST

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