Your radiation oncologist will decide how many treatment sessions you should have. Typically, treatment for breast cancer is done over four to six weeks, but you could be in treatment for as long as seven weeks. Radiation therapy sessions typically take 20 to 30 minutes including set-up time at the beginning of treatment, but over time it may only take 5-10 minutes in and out of the treatment room.
If your radiation oncologist recommends APBI (accelerated partial breast irradiation), you could have up to ten sessions in five days.
Alternatively, if your radiation oncologist recommends radiosurgery as your treatment, you will have one to five treatment sessions, averaging 20 minutes or more per session. To learn more about how radiation therapy and radiosurgery differ, see our Radiation Treatments overview page.