Referred to this opening by the recruiter, after having my resume selected by the manager. It was a 3-round interview, each round took roughly 1 hour and was attended by 2 members of the imaging group. The interview was conducted in a very professional way, the interviewers tried to make me as comfortable as possible, and the questions were professional as well. It was more like a 2-way conversation. Although it was pretty exhausting (seriously, it was a non-stop 3-hour 3-round interview; even the interviewers seemed quite exhausted) and in the end I didn't get the offer, overall it was a very pleasant experience.