A Positive Update About Radiation...

So I met with the radiation oncologist the other day and it sounds like things should tentatively go well.  He said that because I was an "early responder" meaning I had a clear PET scan so early in my chemo rounds (after round 4 actually) I win the lower radiation dose of 2400 something.  I have no idea what 2400 means, but it sounds better than receiving a higher dose that they would use for example breast cancer.  Because I will be receiving a "lower dose" he thinks I should only experience minor side effects like reddened/warm skin or some generalized fatigue.  I'll be doing about 18 treatments, Mon-Fri, five days a week.  He wants me to "settle" from chemo so I won't start radiation until October.