If you display erroneous information the you will be liable.
Previous poster pointed out that this is true if sold as a medical device by an OEM. Medical device OEMs have a strict set of guidelines they need to follow for the creation of these devices--risk management, CAPA processes, demonstration that design outputs are tested against design inputs. (FDA 21 CFR Part 820, for example)
That being said, a hospital has a much less stringent set of requirements (though I believe there is much discussion in the FDA related to this). With the proper research agreements, IRB review (Institutional Review Board), and following proper research procedures (e.g. patient consent), a doctor can try new ideas, technology, or off-label use of existing device. However, Google would not be liable unless they want to sell a healthcare version.