LN_COLUMNAR_DIST：generates empty NIfTI files

[lixin12023]

I encountered an issue when using LN_COLUMNAR_DIST. After running the command, it generates empty NIfTI files despite no errors in the terminal output.

I have a NIfTI file with dimensions 656 × 219 × 10 × 240.
I created a layer file using the following command: LN_GROW_LAYERS -rim rim.nii -N 21 -vinc 400
Then, I extracted layers 7 to 9 as a mask. I generated a boundary file (line.nii).
I ran the following command to compute columnar distances: LN_COLUMNAR_DIST -layers rim_layers.nii -landmarks line.nii -Ncolumns 70 -vinc 400 -output columns.nii -verbose
However, both the intermediate and final output NIfTI files are empty.Since there are no error messages in the terminal, I am unsure what went wrong.Are there specific constraints or assumptions regarding the input dimensions or file contents that I might be missing?

Any help or suggestions would be greatly appreciated! Thanks in advance.

[layerfMRI]

Hi Li Xin,

Thanks for reaching out. Sorry for the trouble.

Could you share an example dataset so that I could try to run it and see where the problem is?

Maybe LN_3Dcolumns or LN2_GEODISTACE might be able to do the trick for your purpose too?

Best regards, renzo

[lixin12023]

Thank you for your time and assistance.

To clarify, the data I am using is from the 7T example dataset you provided. The files necessary for the command to run, specifically rim_layers.nii and line.nii, are attached below for your reference.

I hope this helps in further diagnosing the issue. Please let me know if there is any additional information you need or if I can provide further clarification.

Thank you again for your support.

data.zip