Perhaps of interest. A state senator in Vermont was scheduled for focused ultrasound surgery in Boston but a week before, docs found his skull to be literally too thick. So instead of that very new procedure, he underwent a pallidotomy, rarely done now, but not so new - dates back to pre-Sinemet, pre-DBS days.
vtdigger.org/2017/01/16/dig...
Audio about operation is about 7 minutes in to this interview w/ reporter.