Hi,MRtrix experts I followed https://mrtrix.readthedocs.io/en/latest/fixel_based_analysis/mt_fibre_density_cross-section.html#assign-subject-fixels-to-template-fixels and finished 1-22 steps. I take two subjects two timing to try to analyse(001:subject one;002:subject two;pre:preradiotherapy;after…

OK, there’s quite a lot going on here, I’ll try to unpack: first off, the fc.mif file you’re trying to display is in the fixel format ( full description here ). That image contains a linear array of values, one for each fixel. If you display it, it’ll be a very long line of values, and will most li…

Hi,J-Donald Tournier I am so glad that you can read my post and reply to me. Next,I took 001_control as a example to display a single subject’s FD,FC and FDC. Another question,Is the Colour Bar in the upper right corner of the following three figures showing the FD,FC and FDC value range for this…

Hi, J-Donald Tournier I have finished reading your article “Investigating white matter fibre density and morphology using fixel-based analysis”. I have a question:What is the range of FD value and FC value?Like FA(fractional anisotropy),It ranges from 0 to 1. Thanks, Silver

[image] silver_mark: Another question,Is the Colour Bar in the upper right corner of the following three figures showing the FD,FC and FDC value range for this single subject(001_control)? Yes. More precisely, for the fixel data file currently selected in the tool list view (on the right). …

[image] silver_mark: What is the range of FD value and FC value?Like FA(fractional anisotropy),It ranges from 0 to 1. It’s not that simple, there’s no hard limits like there might be for FA. In general, FC should be around 1±20% (it’s a scale factor), and FD tends to be between 0 & 0.3 or so,…

yes. Because in the papers studied by FBA method that I read, the result diagram shows the differences between two groups of people, but does not show the FD or FC value of one person or a group of people.So I don’t know whether FD or FC value also has a clear limit. Like: [image] As I show one…

What is the range of FD value and FC value?Like FA(fractional anisotropy),It ranges from 0 to 1. It’s not that simple, there’s no hard limits like there might be for FA. In general, FC should be around 1±20% (it’s a scale factor), and FD tends to be between 0 & 0.3 or so, but it might go quite…

Hi,Rob Thank you for clearing me up.If I have any questions about the FD,FC and FDC values, I will consult you again.I hope you don’t mind. :grinning: Silver

[image] rsmith: If there is no fixel in subject space that maps to a fixel in template space, then the value of FD for that template fixel will be 0.0. Hi @rsmith . This is indeed what I thought. But I was wondering: how does fixelcfestats deal with these zeros? It’s not right to include thes…

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FBA:How to display one subject's the VALUE of FD,FC and FDC

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