Attempt to reproduce HCP-1065 fiber template

[Brian Rutt]

Hi Frank,

 

I am trying to reproduce the HCP-1065 fiber template starting from the individual subject *.qsdr.fz files. To do this, I ran the GUI version as well as a command-line equivalent of the DSI-Studio Create Population Average tool. These two approaches yielded similar or identical results based on visually comparing whole-brain fiber tractography.  However, the results from the HCP-1065 template are quite different: the preexisting template whole brain tractography is denser especially in the central brain. 

 

For this reason, I’d like to ask the following:

• Is the CLI command fully equivalent to the GUI tool?  The CLI command I'm using is "dsi_studio --action=tmp --source="data_directory/*.qsdr.fz" --output="output"
• Is the "Create Population Average" the (only) correct approach to forming a multi-subject template, and if so why does the resulting template appear to have sparser tracts than the preexisting HCP-1065 fiber template?
  • Template file downloaded from https://brain.labsolver.org/hcp_template.html "1.25-mm population-averaged FIB file in the ICBM152 space."
  • Individual subject files downloaded from https://github.com/data-hcp/lifespan/releases/tag/hcp-ya, using *.qsdr.fz

 

Thanks for your support!

- Brian