Welcome to Lange Q&A: Psychiatry, 9th edition. It is
an exciting time to be studying or practicing psychiatry
as sophisticated imaging techniques herald
potential changes in how we think about diagnostic
criteria and the brain itself. Such methods aren’t yet
ready for clinical use, and are certainly not part of the
fundamentals of psychiatry tested on the USMLE
Step 2 examination, but they are worth noting
nonetheless because future generations of medical
students—users of future editions of this book—will
more than likely need to master such material.