Yes, it is, and she will probably appreciate this attempt to avoid confusion.
But are we to understand that you intend to write, "Dr. Susan Wayne (in full name)"? I would suggest "Dear Dr. Susan Wayne,".
I'd also suggest you delineate your examples from other material in your posts in some way in the future to avoid the above confusion. Inverted commas are a conventional way to do this.
You can also write:
"Dr. Susan Wayne, X lecturer,
Dear Dr. Wayne, ..."
Student or Learner