Basic Radiotherapy Physics And Biology Here

: Between treatments, both normal and tumor cells begin to grow again. The trick is to ensure the "kill rate" exceeds the "growth rate".

: Normal cells are often better at repairing sublethal DNA damage than cancer cells.

Once the physics delivers the dose, the biology of the cell takes over. The success of treatment is governed by five key biological principles known as the :

: These create dense "tracks" of ionization, causing complex, clustered DNA damage that is much harder for a cancer cell to survive. Further Reading

Not all radiation is created equal. The describes how much energy a particle deposits as it travels through tissue: