# Coregistration problem - mismatched fiducials and improper electrode positions

**URL:** <https://mne.discourse.group/t/coregistration-problem-mismatched-fiducials-and-improper-electrode-positions/9240>\
**Category:** Support & Discussions\
**Tags:** coregistration\
**Created:** [August 22, 2024, 6:46pm UTC](https://mne.discourse.group/t/coregistration-problem-mismatched-fiducials-and-improper-electrode-positions/9240 "2024-08-22T18:46:29Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![KAnshu](https://avatars.discourse-cdn.com/v4/letter/k/e36b37/32.png) [@KAnshu](https://mne.discourse.group/u/KAnshu)\
**Post date:** [August 22, 2024, 6:46pm UTC](https://mne.discourse.group/t/coregistration-problem-mismatched-fiducials-and-improper-electrode-positions/9240/1 "2024-08-22T18:46:29Z")

</div>

Hi,

I am running mne 1.6.0 on macOS-14.6.1-arm64 and Python 3.11.7. I have 128-channel EEG (EGI) data. Channel locations were digitized using Geoscan. I also have T1 scans for each participant. I imported the data in EEGLAB .set format with the digitized channel locations. I have also tried importing the channel locations directly using mne.channels.read\_dig\_egi(‘data/coordinates.xml’). The EEG montage looks fine.

However, I don’t seem to be obtaining accurate coregistration. The fiducials and EEG sensor positions don’t look okay. Please see the attached screenshot. Please advise how to correct this problem.

Thanks,  
Anshu

 ![coregistration_problem](https://global.discourse-cdn.com/free1/uploads/mne/original/2X/a/a5f44642d760464d02f713d213e36e397e70b100.jpeg)