Radiation therapy is a way of treating cancers using X-rays or other types of radiation. It is also known as radiotherapy.
The two main types of radiation therapy are external beam radiation therapy and brachytherapy.
What you need to know
Radiation therapy for stomach cancer
Radiation therapy is often used to treat stomach cancer.
It can be used at different times and for different reasons:
- before surgery to shrink the cancer
- after surgery to reduce the chance of the cancer coming back
- when someone is not able to have surgery
- to ease symptoms caused by advanced stomach cancer – this is called palliative treatment.
Radiation therapy for stomach cancer is external beam radiation therapy (ERBT). It can be given alone or in combination with chemotherapy.
External beam radiation therapy (EBRT)
External beam radiation therapy (EBRT) uses beams of X-rays or other radiation to treat cancer from outside the body. The beams are produced by a large machine called a linear accelerator.
There are several different types of EBRT. Most involve having treatment 5 days a week for a number of weeks. Others only need a small number of treatments.
Before starting radiation therapy you will go to a simulation or planning session to work out how you will be positioned for treatment.
When you go for each treatment, most of the time is used to set you up in the right position. The actual radiation beam is only on for a few minutes.
EBRT is not painful and you won’t feel anything during the treatment. You will hear some buzzing noises and the machine will move around you but it won’t touch you. The radiation therapist can see and hear you throughout the treatment.
The radiation oncology team
Health professionals who work as part of the radiation oncology team include:
- radiation oncologist
- radiation therapist
- radiation oncology nurse
- medical physicist.
What to ask or talk about
Possible side effects of radiation therapy for stomach cancer
Most people get some side effects with radiation therapy to the stomach.
These can include:
- nausea and vomiting
- tiredness (fatigue)
- sore throat
- difficulty or pain when swallowing
- redness and other skin changes in the treatment area
- hair loss in the treatment area.
There may also be some less common or long term side effects from radiation therapy. Ask your doctor or nurse what side effects to expect, and how to manage them.
Will I be radioactive?
External beam radiation therapy (EBRT) does not make patients radioactive.
Brachytherapy patients can be radioactive while they are receiving treatment. Those who go home with radioactive sources in their body will give out a very small amount of radiation which reduces over time.
Some other types of radiation therapy can also make patients radioactive for a time after treatment.
Preparing for radiation therapy
Before radiation therapy, you will need to sign a consent form. It is important you understand what you are consenting to and the possible side effects.
Some things you should know are:
- whether you need any tests before starting radiation therapy
- if you need to change your diet or medications
- when you have to be there
- if you need to have time off work
- if you will be able to drive after radiation therapy.