> The researchers successfully tested the robots on phantom heart models that closely mimic a human heart, and on real porcine heart tissue. The robots traveled smoothly and autonomously, even against simulated blood flow.

“In mice” - actually not even.

Not really, as your victim would also need to be in an MRI-like machine for fifteen minutes to an hour.

I do hope this is serious research as well. It’s hard to tell from the outside.