I am sure that they completely understand how it all works but to my understanding the cancer cells DNA is altered and they can't replicate so the cells eventually die. It damages healthy cells as well but not the DNA. Radiation is "fractionalized" deliberately to allow for healthy cells to repair or regenerate themselves.

You had an unusually easy time of it - did you have IMRT?


Gary Allsebrook
***********************************
Dx 11/22/02, SCC, 6 x 3 cm Polypoid tumor, rt tonsil, Stage III/IVA, T3N0M0 G1/2
Tx 1/28/03 - 3/19/03, Cisplatin ct x2, IMRT, bilateral, with boost, x35(69.96Gy)
________________________________________________________
"You are a mist that appears for a little while and then vanishes" (James 4:14 NIV)