I cannot impress upon you enough to be very careful not to push your luck. While RF Ablation can be a good thing in some instances, it can also bury Barrett's cells deep within tissue making it very difficult if not impossible to see later on. RF can also cause a horrible stricture as well as damage to the lower esophageal sphincter valve.
Your doctor may be very good, but mine was/is considered to be one of the world's best when it come to RF Ablation for Barrett's. Nevertheless, he burned me too deeply, beyond the lining into the esophageal muscle tissue causing a horrible stricture, permanent scaring of my esophagus and to my lower esophageal sphincter (which weakened this valve). In my case it was not abnormal acid reflux that caused the very small spot of Barrett's, but rather Aleve taken for many years to relieve knee and lower back pain. Prior to my RF treatment I never had abnormal acid reflux, never experienced heartburn -- didn't even know what it felt like . After having RF Ablation I now know well what acid reflux and heartburn feels like. With RF, all I can say is please use caution.
There's now a very promising treatment for Barrett's waiting for approval. It does not involve burning, chemicals, or cutting. It's called "banding". Here's the link: http://www.meRABcape.com/viewarticle/562444_print
Had I known in how dangerous RF Ablation is I would not have had it. It's completely ruined my life - quite possibly shortened it. From what I've been told I'm not the only person suffering from results of RF of Barrett's. You may wish to read this about ablation: http://www3.interscience.wiley.com/journal/118960302/abstract?CRETRY=1&SRETRY=0
As for Photodynamic treatment: Do not do it. All the data shows great chance of stricture and other extremely dangerous problems. The patient cannot be exposed to sunlight for a month or more. The "chemicals" used go into other parts of the body, not just the Barrett's cells. It can cause damage to the eyes, even blindness.
Good luck, and please keep in touch.
Ali