About collecting digitized points using a 3D scanner

[rpa19008]

Hi,

I tried to digitize using the method you taught me, but after determining NAS, LPA, and RPA, I could only collect points in order starting from FPz, and could not move on to collecting T7, T8, Oz, and GND.

Is there a better way to do this?

[tmedani]

@chinmay.chinara can you please check this.

[chinmay.chinara]

Continuing our discussion from:

How to acquisition head points by digitizing using a 3D scanner

Currently we do support the automatic detection of Brain Products' 64 cap as well. Follow as per the tutorials with these updated steps: For the step Configure EEG montage, go to EEG montage>Add EEG Montage...>Use default EEG cap>ICBM152>BrainProducts>BrainProducts ActiCap 68 For the step Collect EEG points, collect the points T7, T8, Oz and GND in order for the Auto button to be active. You can hover on the button as well to find this instruction. After collecting/detecting all the EEG poin…

It seems the EEG cap montage you selected is not correct. Can you make sure you selected as I recommended in the thread above i.e. EEG montage>Add EEG Montage...>Use default EEG cap>ICBM152>BrainProducts>BrainProducts ActiCap 68

After selecting that the Coordinate list should look as under:

You can now collect T7, T8, Oz and GND in order and Auto button should activate.

Walkthrough video:

BrainProducts Acticap 64 channel - Digitizing using 3D Scanner

[rpa19008]

@chinmay.chinara

I followed your advice and was able to successfully digitize. It was a big help. Thank you for your advice.

I have two additional questions.

・We use a 64ch cap, but I think the cap montage on Brainstorm is set to 68ch. Is it necessary to individually delete points that do not exist on the cap we are actually using, such as PO9 and PO10?

・We would like to digitize using individual anatomy data, rather than the default anatomy data, in order to enable better signal source estimation. Is this possible? If so, could you please tell me how?

[chinmay.chinara]

@rpa19008 glad it worked for you.

・We use a 64ch cap, but I think the cap montage on Brainstorm is set to 68ch. Is it necessary to individually delete points that do not exist on the cap we are actually using, such as PO9 and PO10?

@tmedani can you advice here ?

・We would like to digitize using individual anatomy data, rather than the default anatomy data, in order to enable better signal source estimation. Is this possible? If so, could you please tell me how?

Absolutely it is possible to do so. Follow the steps as under:

1. Lets say your subject ID is Sub1. Switch to anatomy tab and create a new subject under named "3DScanner_Sub1"
   

   

2. This should create a new subject in the anatomy tab as under
   

   

3. Import your individual anatomy data inside it.

4. Click on File > Digitize > 3D scanner and in the subject ID pop up enter Sub1 and click OK.
   

   

5. Then continue with 3D scanner digitization as before.

[rpa19008]

@chinmay.chinara
Thank you for your advice.

As instructed, I specified the sub into which I loaded my personal CAT data and followed the same digitizing steps. When I check the data I created using MRI registration as in the tutorial, the head model is the default head model, not my personal one. Why is that?

[chinmay.chinara]

@rpa19008

As instructed, I specified the sub into which I loaded my personal CAT data and followed the same digitizing steps. When I check the data I created using MRI registration as in the tutorial, the head model is the default head model, not my personal one. Why is that?

@rpa19008 I updated my previous post with images to the steps. That should make things more clear.

[rpa19008]

@chinmay.chinara
I was able to successfully complete the digitization on individual brain.
I'm extremely grateful for the generous support.

[chinmay.chinara]

@rpa19008 That's great to hear