About Radiotherapy

Radiotherapy uses high-energy rays to treat cancer. It can be used to cure cancer, reduce the chance of it returning, or help relieve symptoms. This page provides information about how radiotherapy works and what to expect during treatment.

Architect graphic of LINAC treatment room

What is Radiotherapy?

Radiotherapy is a treatment that uses high-energy rays, similar to X-rays, to kill cancer cells. It's a highly effective treatment for many types of cancer and can be used alone or in combination with other treatments like surgery or chemotherapy.

The radiation damages the DNA inside cancer cells, preventing them from dividing and growing. The radiation can also affect normal cells in the treatment area, but they typically recover better than cancer cells.

 

Aim of radiotherapy

You can be given radiotherapy for different reasons. You may be given radiotherapy to try and destroy a tumour and cure the cancer. This is called curative or radical treatment. It may be used in combination with other treatments, such as surgery or chemotherapy.

If it’s not possible to cure the cancer, doctors may give you radiotherapy to help relieve symptoms you have. This is called palliative treatment.

The type of radiotherapy you’re given will depend on your individual situation.

 

 

Types of Radiotherapy

External Radiotherapy

External radiotherapy is the most common type of radiotherapy used. It is usually given as a course of several treatments over days or weeks.

External radiotherapy is usually given during outpatient visits to a hospital cancer centre. A machine directs the high-energy radiation, usually X-rays, at the cancer site and a small area of normal tissue surrounding it. You will be positioned carefully on a treatment couch, and then the machine will be directed exactly at the area to be treated, often from different angles. Treatment takes several minutes and is painless.

Before you start your course of radiotherapy, you will usually need to attend the hospital for treatment planning.

External radiotherapy doesn’t make you radioactive, and you can safely mix with other people, including children, at any time during your treatment.

Internal Radiotherapy

Internal radiotherapy can be given in several ways.

Brachytherapy is a treatment in which solid radioactive sources are placed inside a body cavity or needles are placed in the tumor. This is usually given on an outpatient basis but may involve staying in the hospital for a few days until the radioactive source has been removed.

Another type of internal radiotherapy involves using a liquid source of radiation and is called radionuclide (radioisotope or unsealed source) therapy. It can either be taken by mouth or given as an injection into a vein. For this type of treatment, you will need to stay in the hospital for a few days until most of the radioactivity has disappeared from your body.

If you are going to have internal radiotherapy, your doctor will discuss this with you and give you further information.

Occasionally, with radioactive treatment or with treatment with radioactive 'seeds,' you will be emitting a certain amount of radioactivity for a few days. This is why there may be temporary restrictions on your movements and visitors. This will be carefully explained to you.

Your Radiotherapy Journey

Before Radiotherapy

Planning or pre-treatment is the process of obtaining relevant information about the size area and shape of the area of the body being treated. This is most commonly performed using a CT scan, to obtain 3D images of the patient, which are used to create individualised radiotherapy plans which allow the treatment prescription to be written.

Depending on what area is being treated, there are several different processes and types of equipment used to prepare and plan treatment.

 

 

During Radiotherapy

How many treatments will I have?

You may have a single treatment or a course of treatments, called fractions, over several weeks. This depends on why radiotherapy is recommended for you. Lower doses are given for palliative treatment than for curative treatment and usually over a shorter period of time.

When do I attend for treatment?

Radiotherapy is normally given Monday to Friday as an outpatient. The number of treatments you will need depends on many facts about you and your particular type of cancer. This can vary from a single treatment to a number of weeks of treatment. A course of radiotherapy may last for six or seven weeks. Everyone is different, and your doctor will decide how many treatments are best for you.

Most people receive radiotherapy as outpatients, travelling to the department each day. You might like to ask a friend or relative to come with you.

The staff will explain where you need to go and will try to arrange an appointment time that suits you. If you are staying in the hospital, the radiographers will arrange your treatment times with the ward staff.

It is important that you don’t miss any appointments, particularly if you are having treatment to your head and neck area. If you can’t attend for any reason, please let the radiographers know in advance if possible.

What happens when I come for treatment?

Each time you visit for treatment, a radiographer will ask you three questions to make sure you are the person they are expecting to treat. These are your name, address, and date of birth (even though they may know you).

The radiographers, who carry out your treatment, will explain things to you. If there is anything you don’t understand or if you have any questions, please ask them.

You may be asked to change into a gown before treatment, and then the radiographers will position you on the couch. Using the tattoos or marks that were put on your skin during treatment planning, they will line up the radiotherapy machine. It won’t usually touch you.

The preparation may take some time, often longer than the treatment itself. It will probably take longer on the first day. On most, if not all, occasions the radiographers will do some kind of imaging prior to delivering the radiation treatment to verify your position. When the radiographers are satisfied that you and the treatment machine are in the correct position, they will switch on the beam for treatment. You won’t feel anything during the treatment. 

The radiographers will watch you using closed-circuit television. and they can speak to you via an intercom. You should keep very still during the few minutes it takes to give your treatment, but you can breathe and swallow normally. The machine may move around you during treatment, or the radiographers may come in to change your position or that of the machine. They will explain each step to you.

The radiographers will give you special instructions, for example, about the care of your treatment area. Please try to follow these carefully.

After Radiotherapy

You may need to reduce the hours that you work or cut back on social or sports activities. Make sure you get enough rest and accept offers of help with everyday tasks or jobs. If you are worried about anything or would just like to talk, your doctor, radiographer, or nurse will be happy to listen or advise.

The radiographer will check your progress regularly during your treatment, and you will see the doctor or nurse from time to time in a clinic. If you have questions at any time, do ask.

There are many people in the hospital that may be able to help and support you: If you would like to find out what services are available or how to contact a particular person, please ask.

 

Radiotherapy side effects

The side effects you may experience will depend on the part of the body that is being treated and how much treatment you have. Side effects only affect the part of the body that is treated. Everyone reacts to radiotherapy differently, and many people have hardly any side effects. The radiographers will give you lots of support and advice to care for and manage the side effects.

You will also be given written information about the side effects relevant to your treatment. Most side effects are temporary, and they are rarely severe. They may start at varying times during treatment and disappear in the weeks after the end of it. Some side effects may not start until treatment is finished.

Your doctor will discuss any possible temporary or permanent side effects with you before the start of your treatment and before you sign your consent form.

 

General side effects

Tiredness

Radiotherapy can make you feel more tired than usual. You should listen to your body and rest if you need to, but continue your normal activities if you feel able. Some people are able to continue working, but others find they are too tired. Tell your radiographer or doctor if tiredness is a problem. They may be able to offer advice on ways to save your energy and cope with everyday activities.

During your course of radiotherapy, you may have regular blood tests to check the effects on your general health. If the radiotherapy causes anemia, it may be necessary for you to have a blood transfusion.

Nausea and vomiting

A few people feel sick during radiotherapy; it depends on which part of the body is being treated. Some people feel sick at the beginning of a course of treatment but find that nausea often disappears within a day or two. Others start to feel sick later on.

Do tell the radiographers or your doctor if you suffer from nausea. You can be given drugs to control it, and it’s very unlikely that your radiotherapy will need to be suspended. 

Eating and drinking

It is important to try to eat well during your treatment and also drink about two liters of fluid (three to four pints) each day. This may not be easy if you are nauseous, tired, or spend a lot of time traveling to and from the hospital.

The dietitian can help you to plan your meals and can offer lots of hints about what to eat. Any of the team caring for you can contact the dietitian if you would like advice.

Hair loss

Radiotherapy can cause hair loss in the area being treated. Most hair loss is temporary, and it will start to grow back within two to three months of finishing treatment.

Sore skin

There is currently no general agreement based on research regarding caring for skin during radiotherapy. Advice on skin care varies from one hospital to another. The staff at your radiotherapy department will give you advice about how to care for your skin in the treatment area at the beginning of your course of radiotherapy.

During treatment the skin may become red and sore, and it’s important not to irritate it. Avoid shaving within the treatment area. You may wash the area gently using a mild, unperfumed soap, such as baby soap, and pat it dry. Don’t use any deodorants, perfumes, or lotions on your skin other than those recommended by the team caring for you. You should protect your skin from extremes of temperature and continue using sunscreen (factor 50 minimum) after your treatment has finished.

There has been little research into the effects of radiotherapy on different ethnic skin types. However, anecdotal evidence suggests that people with darker skin (for example, Asian or Afro-Caribbean) may develop greater skin reactions during treatment than people with lighter skin.

If you have any discomfort, the radiographers or nurses will advise you on skin care. The doctor may prescribe or suggest a cream or lotion for you to use. Swimming may not be advisable if you develop a skin reaction, as the chlorine in the water may irritate your skin. If you do swim during treatment, make sure you rinse the skin well and apply aqueous cream. Discuss this with your doctor, radiographer, or nurse.

Clothing

You may find it more comfortable to wear loose, casual clothing made from natural fibers. 

Joint or muscle stiffness

Occasionally, people who have radiotherapy to areas over joints or muscles may experience some stiffness. This can occur at any time up to two years after treatment has finished. Regular exercise of these joints and muscles can prevent stiffness. Your doctor may refer you to a physiotherapist. If not, please ask for advice.

 

Late side effects

Any side effects that may develop in the longer term and that may be permanent depend on the part of your body that has been treated, the dose of radiotherapy you have received, and many other things, such as why you are having radiotherapy. Your doctor will be able to explain these side effects and also the likelihood of them occurring. Do ask your doctor if you have any concerns.

 

If you have any questions or need support and advice now that your radiotherapy is finished, please contact the Radiotherapy Department in the first month following treatment. Contact us. Tel: 017765 235 465

Frequently Asked Questions

Here are answers to some common questions about radiotherapy treatment.

Is radiotherapy painful?

No, you won't feel anything during the actual radiotherapy treatment. It's similar to having an X-ray taken. However, some side effects that develop during the course of treatment may cause discomfort or pain, which your healthcare team can help manage.


Will I be radioactive after treatment?

No, external beam radiotherapy does not make you radioactive. You can safely be around other people, including children and pregnant women, during and after your treatment. For internal radiotherapy (brachytherapy), there may be special precautions for a short time, which your healthcare team will explain.


Can I drive to and from my radiotherapy appointments?

Most people can drive during radiotherapy treatment. However, if you're experiencing fatigue or taking medications that might affect your driving, you may want to arrange alternative transportation. Discuss this with your healthcare team if you're concerned.


Can I work during radiotherapy treatment?

Many people continue to work during radiotherapy, especially if their job isn't physically demanding. However, fatigue is a common side effect, so you may need to adjust your working hours or take time off. Your healthcare team can provide a medical note if needed.


What should I wear to my radiotherapy appointments?

Wear comfortable, loose-fitting clothes that are easy to remove or adjust, as you may need to change into a hospital gown for some treatments. Avoid wearing metal (like zippers or underwire bras) in the treatment area. Your radiotherapy team will advise you on specific clothing recommendations for your treatment.

Support During Treatment

We understand that undergoing radiotherapy can be physically and emotionally challenging. Our dedicated team is here to support you throughout your treatment journey. If you have any questions or concerns, please don't hesitate to speak with any member of your care team.

Radiotherapy Department Support

For questions about your treatment or side effects call 01752 431 888, Monday to Friday, 8am to 6pm

Emergency Support

For urgent concerns outside normal hours call 01752 431 999, Available 24/7 for radiotherapy patients

Possible Side Effects

Possible Side Effects

Radiotherapy can cause side effects because it affects normal cells in the treatment area. Side effects vary depending on the part of the body being treated, the dose of radiation, and whether you're having other treatments like chemotherapy.

Most side effects begin during or shortly after treatment and typically improve within a few weeks after treatment ends. Some side effects may develop months or years after treatment.

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