Voxel material reading Error

Geometry and Materials
1

default.txt (1.5 KB)
newconver.txt (206.6 KB)
Dear Fluka experts!
I am now working on a project which need introduce a voxel material phantom into monte carlo scope.Since I have special requirments in this project, i write a new .mat file to build my phantom.So I write a new HU-Material convertion table

f1902f40b34af5bd87708df8c3968d0
f1902f40b34af5bd87708df8c3968d01264×613 80.6 KB

Then I build a voxel phantom through this mat file sucessfully, and builc it in my inp file
75195b16c1bd70f7d9c5c6d87b12f7f
75195b16c1bd70f7d9c5c6d87b12f7f676×543 61.2 KB

However, the material information is error , showing an error remind in geometry like this
9d35d53656b70fba8ab007cfc3630c1
c116fb56fec28d9163bbd539ff564ba
c116fb56fec28d9163bbd539ff564ba744×142 12.3 KB

At first i think the error may comes from the new mat file so i test the vxl builc process with a regular dicomct and default mat file. This error occurs again, so i am now wondering if there any solution for this error. I attached all vxl and .mat file here. Thank u so much for your help!

2

default.txt (1.5 KB)
Here also the error report:
e98aab7dc05476884e40e96613fb6a2
8d60df997847003741e90b7414dd6fe

3

newconver.txt (206.6 KB)

5

Dear Richard,

Thanks for your question, we will soon look into it. Could you please complete your question by adding also flair and/or input file, so that I can reproduce the error message?

Thanks,
Marco

6

Dear Marco
Here is the code and attached vxl file , you can get access to all files here,Thank you so much for your kind help! flukacode.zip - Google Drive

7

Dear Richard,

It is still not entirely clear to me what might be your problem, but I have a few considerations:

  • I opened your dualct2.flair file and I found that the VOXEL card had a wrong filename, I chaged it alternatively to the two .vxl files you provided (default.vxl and newconver.vxl), however, also for me the voxel regions did not have a material assigned → there might be something wrong with both files.
  • Then I decided to create a .vxl file from scratch starting from a dicom example file that I found on the web (.dcm), to test your newconver.mat file:

    • first I used for the material definition head.mat (a file provided in the Flair webpage, in section Auxiliary files) → this worked fine and created the desired geometry (see picture below)
      image

    • then I used newconver.mat and in this case I got the same error message you are receiving (se picture below).
      image

To me, there is something wrong with newconver.mat, but also probably with default.vxl and newconver.vxl.
Can you please try to re-generate your .vxl file starting from your dicom file and using, for the materials, head.mat (download it from the Flair webpage, in section Auxiliary files)? To create the .vxl file, I would suggest you to follow the steps provided in this thread: RT-planning example using Fluka.

I hope this can help you,
Cheers,
Marco

8

Dear Macro
Thank so much for your knid help! i have already find the error source, it might attribute to the wrong material defination. I then build new compound material and load it into user defined material scope, the load of new developed vxl seems works well now. Appreciate your suggestion!
Sincerely
Richard Lee