Radiation therapy can harm normal tissue,
so it needs to be carefully planned and precisely given. This helps
ensure the radiation kills as many cancer cells as possible while doing
as little damage as possible to other parts of your body.
Radiation therapy is planned specifically
for your breast cancer and the shape of your body, so sessions cannot
be split between different treatment centers. Your therapy plan is based
Your radiation oncologist oversees the
radiation planning session. During the planning session, you will lie on
a special table while the radiation oncologist decides the proper dose
of radiation and the best areas to receive the radiation. He/she will
use a CT scan to guide the radiation planning.
During the planning session, the
radiation oncologist will put small marks (about the size of a pinhead)
on your skin. These marks ensure you are correctly positioned for each
treatment. They may be ink spots, or they may be tattoos. If they are
ink spots, it is important not to wash them off until after you finish
Sometimes, you will be asked to hold your
breath during the planning session. This is one way to avoid radiation
exposure to the heart.
Your radiation oncologist leads a team
that includes technicians and nurses. The team will work with you at
each radiation therapy session. During each session, you will lie on a
special table. Most often, your entire breast will be given a dose of
radiation. Again, sometimes you will be asked to hold your breath while
the radiation is given. This is one way to avoid radiation exposure to
If lymph nodes removed during surgery
were found to have cancer, often the area around the lymph nodes is also
treated with radiation. Learn more about lymph nodes.
Each session lasts about 20 minutes. Most
of this time is spent positioning your body to ensure the treatment is
given exactly as planned. Treatment is usually given once a day, five
days a week, for three to seven weeks. The schedule of radiation
sessions is designed to treat your breast cancer and varies from person
Some women may get a shortened course (only three to four weeks) of radiation therapy .
This is called accelerated, hypofractionated whole-breast irradiation.
It is like standard radiation therapy except that it uses a slightly
higher dose of radiation per session (hypofractionation). This reduces
the number of treatment sessions (making this an accelerated therapy).
Studies have shown that accelerated, hypofractionated whole-breast irradiation is as effective as standard radiation therapy .
After your radiation therapy sessions
end, you may have more radiation (called a boost) to the part of the
breast that had the original tumor. This boost radiation is given to
increase the amount of radiation therapy given to the area at highest
risk for breast cancer recurrence. Your boost radiation session is
similar to a regular session.
Things to remember while going through radiation therapy
Adapted from the National Cancer Institute materials .
If you do not live near the radiation
treatment center, it can be hard to get to and from therapy sessions.
Sometimes, there are programs that offer help with local or
long-distance transportation and lodging. There are also financial
assistance programs to help you with child care and elder care.
Learn more about transportation, lodging, child care and elder care assistance.
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