[ihnorton]

If you are interested in medical devices, at least in the US there are hospital-based postdoc positions which will hire some engineering PhDs even w/out specifically medical thesis focus (as you are coming from ferroelectrics: potentially MRI or robotics research). In such a position there is a lot of opportunity to attend medical lectures, and also ideally to shadow MDs in clinic, observe procedures, and sit in on case reviews.

There are also various 1-2 year MS degree programs, often called "MS in biomedical sciences", which can function as a bridge into medical careers. Some are designed to prepare for MD or other professional school, while others have a focus on broader background (variety of subjects like anatomy, physiology, and pharmacology).