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2021 Day 8 - Image Reconstruction

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Posts: 8
Topic starter
(@cogneuro-memoryvillanova-edu)
Active Member
Joined: 1 year ago

Hello,

I am running into a problem when trying to do the "HbO/HbR Overlay" section of the workshop. Slides 12 and 13.

After following the instructions, the GUI produces an image that has both hemispheres showing dark red/orange heat mappings.

I have tried multiple iterations of:

  • importing the probe file/register to surface
  • just importing the probe file
  • just registering to surface the initial probe that GUI loads
  • ensuring that I am in the file path with the "groupresults.mat" demo output
  • running it from the "image_recon_demo" folder instead of the "homerOutput" folder
  • running it after doing image_recon for, both, subj 1 and 2
  • running it before doing image_recon for subj 1 and 2
  • setting the time window from 4-8 seconds
  • leaving the time window at default ~1-18

Regardless of the above changes, I get the same output that shows both hemispheres with significant activation (see attachment) from the Hb Conc overlay tool.

So, this question is to simultaneously check - am I doing something wrong? Or, is this a "new" bug? (most likely the former, but that's why I am asking! Ha)

Apologies if this has been asked before, I tried scouring the forum for something similar but only found tangentially related threads.

Thank you for your time!

4 Replies
Posts: 308
(@dboas)
Joined: 4 years ago

You don't appear to be a premium homer user. It is not clear how you watched this part of the workshop, or if you did, since you should only access those training materials if you are a premium homer user.

I haven't used this overlay function in a while, so I don't recall the steps.

Hopefully someone else can answer.

I think Meryem Yücel @mayucel maybe has experienced this issue and is working through it. Maye they are about to post a fix.

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1 Reply
(@cogneuro-memoryvillanova-edu)
Joined: 1 year ago

Active Member
Posts: 8

@dboas Thanks, David.  That's strange about the account status.  I paid for my premium account on Feb 22, 2023.  But looking at my account info, it looks like I have both a freebie account and a premium account.  That could be where the confusion came from.  Either way, thanks for your input.

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Meryem Yücel
Posts: 200
(@mayucel)
Joined: 4 years ago

Can you try image recon instead of overlay and let us know what you get?

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1 Reply
(@cogneuro-memoryvillanova-edu)
Joined: 1 year ago

Active Member
Posts: 8

@mayucel - We managed to fix our issue - it related to changing the "Select [0 2e7] for HbO display".
Thanks for your time!

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