bci technologies are developing and may have started their testing long before this was published on the internet. Synchron or stentrode implant what kind of examination can detect? It is in the jugular vein and a regular MRI may not show it.
We already answered this exact same question on the OpenBCI Forum. There are NO WAYS that a Stentrode electrode could be ‘implanted’ in your body without your knowledge or permission.
And to underline what I just said, such electrodes obviously show up on xrays or MRI, because they have similar construction to other stents. There are NO instances of such devices being placed outside the brain.