Treatment FAQ

what is the purpose of radiation in cancer treatment

by Michelle Goodwin Published 4 years ago Updated 2 years ago
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Radiation therapy kills cancer cells or slows their growth by damaging their DNA. Radiation therapy (also called radiotherapy) is a cancer treatment that uses high doses of radiation to kill cancer cells and shrink tumors.Jan 8, 2019

What type of radiation used that can cure cancer?

What is radiation therapy? Radiation therapy uses high-energy particles or waves, such as x-rays, gamma rays, electron beams, or protons, to destroy or damage cancer cells. Your cells normally grow and divide to form new cells. But cancer cells grow and divide faster than most normal cells.

How does radiation both treat and cause cancer?

Radiation therapy is an important tool for treating cancer patients. The main purpose of radiation therapy are to shrink tumors and kill cancer cells by using chemotherapy.

What are the side effects of radiation for cancer treatment?

Feb 09, 2022 · Radiation therapy is an essential tool for treating cancer and is often used with other therapies, such as chemotherapy or tumor removal surgery. The main goals of radiation therapy are to shrink...

How can radiation help cancer but also cause cancer?

Mar 06, 2021 · Radiation therapy is an effective way to reduce your risk of breast cancer recurring after surgery. In addition, it is commonly used to ease the symptoms caused by cancer that has spread to other parts of the body (metastatic breast cancer). Products & Services Mayo Clinic Cancer Center Show more products from Mayo Clinic Why it's done

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At what stage of cancer is radiotherapy used?

Radiotherapy may be used in the early stages of cancer or after it has started to spread. It can be used to: try to cure the cancer completely (curative radiotherapy) make other treatments more effective – for example, it can be combined with chemotherapy or used before surgery (neo-adjuvant radiotherapy)

Is radiation worse than chemotherapy?

Since radiation therapy is focused on one area of your body, you may experience fewer side effects than with chemotherapy. However, it may still affect healthy cells in your body.Mar 27, 2020

What are the advantages of radiation therapy for cancer?

Benefits and Effectiveness Radiation therapy (also called radiotherapy) is a highly effective cancer treatment with wide-ranging uses. Radiation therapy leads to cancer cure in many patients (either alone or with other treatments) and relieves symptoms or prolongs survival in more advanced cancers.Oct 20, 2020

What is the goal of radiation therapy?

Radiation therapy damages cells by destroying the genetic material that controls how cells grow and divide. While both healthy and cancerous cells are damaged by radiation therapy, the goal of radiation therapy is to destroy as few normal, healthy cells as possible.Jul 1, 2020

Do tumors grow back after radiation?

Normal cells close to the cancer can also become damaged by radiation, but most recover and go back to working normally. If radiotherapy doesn't kill all of the cancer cells, they will regrow at some point in the future.Jul 6, 2020

Do you lose hair with radiation?

Radiation therapy also can cause hair loss Radiation therapy also attacks quickly growing cells in your body, but unlike chemotherapy, it affects only the specific area where treatment is concentrated. If you have radiation to your head, you'll likely lose the hair on your head.

What is the success rate of radiation therapy?

When it comes to early stages of disease, patients very frequently do well with either brachytherapy or external beam radiation. Success rates of around 90% or higher can be achieved with either approach.Oct 25, 2016

What is the disadvantage of radiation?

The disadvantages of radiation therapy include: damage to surrounding tissues (e.g. lung, heart), depending on how close the area of interest is located to the tumor. inability to kill tumor cells that cannot be seen on imaging scans and are therefore not always included on the 3D models (e.g. in near-by lymph nodes.

What are the side effects of radiation therapy for cancer?

Specific side effects of radiation therapy that affect parts of the bodyHeadaches.Hair loss.Nausea.Vomiting.Extreme tiredness (fatigue)Hearing loss.Skin and scalp changes.Trouble with memory and speech.More items...•Dec 10, 2020

What is the next step after radiation therapy?

Most patients return to their radiation oncologist for regular follow-up visits. Others are referred back to their primary care doctor, to a surgeon, or to a medical oncologist—a doctor who is trained to give chemotherapy (treatment with anticancer drugs).Oct 5, 2017

What is the indication when radiation is on?

Indications for external beam radiation therapy include the primary treatment of specific tumor types, adjuvant treatment in addition to surgery and/or chemotherapy for better tumor control, and for palliation to improve quality of life for advanced cancer cases.

How long does it take for a tumor to shrink after radiation?

For tumors that divide slowly, the mass may shrink over a long, extended period after radiation stops. The median time for a prostate cancer to shrink is about 18 months (some quicker, some slower).

What Is Radiation Therapy?

Radiation therapy uses high-energy particles or waves, such as x-rays, gamma rays, electron beams, or protons, to destroy or damage cancer cells.Yo...

Who Gets Radiation Therapy?

More than half of people with cancer get radiation therapy. Sometimes, radiation therapy is the only cancer treatment needed.

What Are The Goals of Radiation Therapy?

Most types of radiation therapy don’t reach all parts of the body, which means they’re not helpful in treating cancer that has spread to many place...

How Is Radiation Therapy given?

Radiation therapy can be given in 3 ways: 1. External radiation (or external beam radiation): uses a machine that directs high-energy rays from out...

Who Gives Radiation Therapy Treatments?

During your radiation therapy, a team of highly trained medical professionals will care for you. Your team may include these people: 1. Radiation o...

Does Radiation Therapy Cause Cancer?

It has long been known that radiation therapy can slightly raise the risk of getting another cancer. It’s one of the possible side effects of treat...

Does Radiation Therapy Affect Pregnancy Or Fertility?

Women: It’s important not to become pregnant while getting radiation – it can harm the growing baby. If there’s a chance you might become pregnant,...

Questions to Ask About Radiation Therapy

Before treatment, you’ll be asked to sign a consent form saying that your doctor has explained how radiation therapy may help, the possible risks,...

Will I Be Radioactive During Or After External Radiation Treatment?

External radiation therapy affects cells in your body only for a moment. Because there’s no radiation source in your body, you are not radioactive...

How does radiation help cancer cells?

But cancer cells grow and divide faster than most normal cells. Radiation works by making small breaks in the DNA inside cells. These breaks keep cancer cells from growing and dividing and cause them to die.

How is radiation given?

Radiation therapy can be given in 3 ways: 1 External radiation (or external beam radiation): uses a machine that directs high-energy rays from outside the body into the tumor. It’s done during outpatient visits to a hospital or treatment center. It's usually given over many weeks and sometimes will be given twice a day for several weeks. A person receiving external radiation is not radioactive and does not have to follow special safety precautions at home. 2 Internal radiation: Internal radiation is also called brachytherapy. A radioactive source is put inside the body into or near the tumor. With some types of brachytherapy, radiation might be placed and left in the body to work. Sometimes it is placed in the body for a period of time and then removed. This is decided based on the type of cancer. Special safety precautions are needed for this type of radiation for a period of time. But it's important to know if the internal radiation is left in the body, after a while it eventually is no longer radioactive. 3 Systemic radiation: Radioactive drugs given by mouth or put into a vein are used to treat certain types of cancer. These drugs then travel throughout the body. You might have to follow special precautions at home for a period of time after these drugs are given.

What doctor is trained to treat cancer?

Radiation oncologist: This doctor is specially trained to treat cancer with radiation. This person oversees your radiation treatment plan. Radiation physicist: This is the person who makes sure the radiation equipment is working as it should and that it gives you the exact dose prescribed by your radiation oncologist.

What is the treatment for cancer that has returned?

To treat cancer that has returned (recurred) If a person's cancer has returned (recurred), radiation might be used to treat the cancer or to treat symptoms caused by advanced cancer. Whether radiation will be used after recurrence depends on many factors.

Why do people get radiation to their head?

This is done to help prevent cancer from spreading to the head even before it can.

How does cancer spread?

Cancer can spread from where it started to other body parts. Doctors often assume that a few cancer cells might already have spread even when they can’t be seen on imaging scans like CT scans or MRIs. In some cases, the area where the cancer most often spreads to may be treated with radiation to kill any cancer cells before they grow into tumors. For instance, people with certain kinds of lung cancer may get radiation to the head, even when there is no cancer known to be there, because their type of lung cancer often spreads to the brain. This is done to help prevent cancer from spreading to the head even before it can. Sometimes, radiation to prevent future cancer can be given at the same time that radiation is given to treat existing cancer, especially if the area the cancer might spread to is close to the tumor itself.

How many people with cancer get radiation?

More than half of people with cancer get radiation therapy. Sometimes, radiation therapy is the only cancer treatment needed and sometimes it's used with other types of treatment. The decision to use radiation therapy depends on the type and stage of cancer, and other health problems a patient might have.

Why do people get radiation therapy?

Why it's done. More than half of all people with cancer receive radiation therapy as part of their cancer treatment. Doctors use radiation therapy to treat just about every type of cancer. Radiation therapy is also useful in treating some noncancerous (benign) tumors.

What is the treatment for cancer?

Radiation therapy. External beam radiation uses high-powered beams of energy to kill cancer cells. Beams of radiation are precisely aimed at the cancer using a machine that moves around your body. Radiation therapy is a type of cancer treatment that uses beams of intense energy to kill cancer cells. Radiation therapy most often uses X-rays, but ...

What type of radiation is used in X-rays?

The term "radiation therapy" most often refers to external beam radiation therapy. During this type of radiation, the high-energy beams come from a machine outside of your body that aims the beams at a precise point on your body.

How does radiation damage cells?

Radiation therapy damages cells by destroying the genetic material that controls how cells grow and divide. While both healthy and cancerous cells are damaged by radiation therapy, the goal of radiation therapy is to destroy as few normal, healthy cells as possible.

How long does radiation treatment last?

Expect each treatment session to last approximately 10 to 30 minutes. In some cases, a single treatment may be used to help relieve pain or other symptoms associated with more-advanced cancers. During a treatment session, you'll lie down in the position determined during your radiation simulation session.

How long does it take for cancer to respond to radiation?

In some cases, your cancer may respond to treatment right away. In other cases, it may take weeks or months for your cancer to respond.

What is the purpose of neoadjuvant therapy?

Before surgery, to shrink a cancerous tumor (neoadjuvant therapy) After surgery, to stop the growth of any remaining cancer cells (adjuvant therapy) In combination with other treatments, such as chemotherapy, to destroy cancer cells. In advanced cancer to alleviate symptoms caused by the cancer.

The Purpose of Radiation

The purpose of radiation is to use high-energy x-rays to kill cancer cells. About 60 percent of all people with cancer receive radiation therapy as part of their treatment program. In many cases, radiation may be the only type of treatment needed to treat patients.

Treatment Experience

Radiation therapy is performed outpatient. External beam radiation — the most common type of radiation therapy—is usually done daily Monday through Friday and lasts about 5 minutes. The treatments are typically painless. Patients usually are seen at least weekly by their radiation oncologist to discuss and manage side effects.

Post-treatment Follow-up

Post-treatment follow-up will be determined by the radiation oncologist. “Typically, patients return to make sure they have recovered, and care is coordinated with other specialists to determine next steps, either systemic therapy or future scans,” Dr. Patel says.

What is radiation therapy?

Radiation therapy is a cancer treatment that uses concentrated radiation beams to kill cancer cells. The most common type of radiation therapy is external beam radiation. This type involves a machine that directs high-energy beams of radiation at cancer cells. The machine allows radiation to be targeted at specific sites, ...

Why do doctors use radiation?

The machine allows radiation to be targeted at specific sites, which is why doctors use external beam radiation for nearly all types of cancer. According to the National Cancer Institute (NCI), about half of all people with cancer will receive radiation therapy.

What is the first step in radiation treatment?

The first step in radiation treatment is determining that it’s the right form of treatment for you. Your doctor will also determine dosage amounts and the frequency of radiation best suited for your cancer type and stage. Sometimes your doctor may decide that radiation therapy is best suited for use at a later stage, ...

How long does radiation therapy take?

Radiation therapy typically takes treatment sessions five days a week for 1 to 10 weeks. The total number of treatments depends on the size and type of cancer. Each session usually takes about 10 to 30 minutes. Often, the individual is given each weekend off from therapy, which helps with the restoration of normal cells.

How long does it take for hair loss to go away after radiation?

Skin changes can include: Other side effects of radiation depend on the area being treated, and can include: According to the NCI, the majority of these side effects go away within two months after treatment is complete.

Can radiation therapy be used at a later stage?

Sometimes your doctor may decide that radiation therapy is best suited for use at a later stage, so you may receive other cancer treatments first. Preparation for radiation therapy involves a radiation simulation. It typically includes the steps seen below.

Can radiation therapy be permanent?

While the therapy also will likely injure healthy cells, the damage isn’t permanent. Your normal, noncancerous cells have the ability to recover from radiation therapy. To minimize the effect radiation has on the body, the radiation is targeted only to specific points in your body. Radiation therapy can be used during different stages ...

Why do we need radiation therapy?

Why it's done. Radiation therapy kills cancer cells. It's often used after surgery to reduce the risk that the cancer will come back. It can also be used to provide relief from pain and other symptoms of advanced breast cancer.

What is radiation therapy for breast cancer?

Radiation therapy for breast cancer uses high-energy X-rays, protons or other particles to kill cancer cells. Rapidly growing cells, such as cancer cells, are more susceptible to the effects of radiation therapy than are normal cells. The X-rays or particles are painless and invisible.

What is the most common type of radiation after a lumpectomy?

One of the most common types of radiation therapy after a lumpectomy is external beam radiation of the whole breast (whole-breast irradiation). Radiation to part of the breast. Radiation therapy to part of the breast (partial-breast irradiation) may be an option for some early-stage breast cancers.

What is radiation after a lumpectomy?

Adding radiation after a lumpectomy reduces the risk that cancer will return in the affected breast. Lumpectomy combined with radiation therapy is often referred to as breast conservation therapy. This type of treatment is as effective as having all the breast tissue removed (mastectomy).

What is the best treatment for breast cancer after lumpectomy?

Radiation after lumpectomy. If you're having an operation to remove the breast cancer and leave the remaining breast tissue intact (lumpectomy or breast-conserving surgery), your doctor may recommend radiation after your procedure to kill any cancer cells that might remain.

What is the procedure to remove breast cancer?

Internal radiation (brachytherapy). After you have surgery to remove the cancer, your doctor temporarily places a radiation-delivery device in your breast in the area where the cancer once was. A radioactive source is placed into the device for short periods of time over the course of your treatment.

How to reduce the risk of breast cancer after surgery?

Radiation therapy is an effective way to reduce your risk of breast cancer recurring after surgery. In addition, it is commonly used to ease the symptoms caused by cancer that has spread to other parts of the body (metastatic breast cancer).

What kind of radiation therapy is used for cancer?

The kind of radiation therapy you get depends on things like: The two main types of radiation therapy for cancer are: External beam radiation therapy . A large machine aims radiation beams from outside your body to a cancer tumor from many angles. It can treat a variety of cancers.

What is the treatment for cancer?

Radioembolization. Cancer Caused by Radiation Therapy. If you've been diagnosed with cancer, your doctor may suggest you get radiation therapy. It's a common treatment that shrinks tumors and kills cancer cells -- and might be the only one you need to tackle your disease.

How to treat cancer before surgery?

The aim is to treat your cancer by slowing or stopping tumor growth. Your doctor may sometimes suggest you get radiation therapy to shrink a tumor before you get surgery. Or they may recommend it after surgery to keep a tumor from coming back. If cancer cells have spread to other parts of your body, radiation therapy can kill them ...

What is external beam radiation therapy?

External beam radiation therapy. A large machine aims radiation beams from outside your body to a cancer tumor from many angles. It can treat a variety of cancers. The machine can be quite noisy, but it won't touch you. It sends radiation to the specific area where there's cancer.

How does brachytherapy work?

They put it inside you using a small tube called a catheter or a device known as an applicator. Brachytherapy usually treats head, neck, breast, cervix, endometrial, prostate, and eye cancers. If your doctor uses a low dose of radiation in brachytherapy, they'll remove the implant after several days. If they use a higher dose, they usually take it ...

How long does it take for radiation to go away?

If they use a higher dose, they usually take it out after 10 to 20 minutes, and you'll get two doses a day for around 2 to 5 weeks. Depending on the type and location of your cancer and the other treatments you've had, your doctor may also place an implant in your body permanently and the radiation will weaken with time.

How long does radiation treatment take?

A visit usually lasts 30 minutes to an hour, most of which is spent getting you in the correct position. The treatment itself usually takes 5 minutes or less.

How long does radiation therapy last?

It is the most common radiation therapy treatment for cancer. Each session is quick, lasting about 15 minutes. Radiation does not hurt, sting, or burn when it enters the body.

Why is it important to be in the same position for radiation?

It is important for your body to be in the same position for each treatment. Your radiation oncology team cares about your comfort. Talk with the team to find a comfortable position that you can be in every time you come in for radiation therapy.

What type of doctor is responsible for radiation therapy?

Radiation oncologist. This type of doctor specializes in giving radiation therapy to treat cancer. A radiation oncologist oversees radiation therapy treatments. They work closely with other team members to develop the treatment plan. Radiation oncology nurse.

What is simulation in radiation therapy?

Simulating and planning treatment. Your first radiation therapy session is a simulation. This means it is a practice run without giving radiation therapy. Your team will use imaging scans to identify the tumor location.

How often should you check for radiation?

During your treatment, your radiation oncologist will check how well it is working. Typically, this will happen at least once a week. If needed, they may adjust your treatment plan.

What is informed consent for radiation?

Giving permission for radiation therapy. If you choose to receive radiation therapy, your health care team will ask you to sign an "informed consent" form. Signing the document means: Your team gave you information about your treatment options. You choose to have radiation therapy.

How long does it take for radiation to go away?

The 2-day break in treatment each week allows your body some time to repair this damage. Some of the effects may not go away until the treatment period is completed. Let the health care professionals if you are experiencing side effects. Read more about the side effects of radiation therapy.

What is internal radiation therapy?

Internal radiation therapy (brachytherapy) allows a higher dose of radiation in a smaller area than might be possible with external radiation treatment. It uses a radiation source that’s usually sealed in a small holder called an implant. Different types of implants may be called pellets, seeds, ribbons, wires, needles, capsules, balloons, or tubes.

What is the term for radiation in the body?

Internal radiation is also called brachytherapy . A radioactive implant is put inside the body in or near the tumor. Getting the implant placed is usually a painless procedure. Depending on your type of cancer and treatment plan, you might get a temporary or a permanent implant.

How long does it take for a cancer implant to stop giving off radiation?

The radioactive materials stop giving off radiation over time. It may take weeks or months. Talk to your cancer care team about how long it will take in your case. Once the radiation is gone, the implant (s) are no longer active. They usually stay in place and cause no harm, so there’s no need to take them out.

Where is the radioactive source placed in the body?

This way the radiation harms as few normal cells as possible. During intracavitary radiation, the radioactive source is placed in a body cavity (space) , such as the rectum or uterus. With interstitial radiation, the implants are placed in or near the tumor, but not in a body cavity.

Can you leave radioactive material in your body?

The radioactive material is not left in your body. The applicator might be left in place between treatments, or it might be put in before each treatment. People getting HDR sometimes stay in the hospital if it involves multiple day treatments and if the applicator is left in place.

Can you give off radiation with an implant?

With internal radiation therapy, your body may give off a small amount of radiation for a short time. If you have a temporary implant, you’ll be asked to stay in the hospital and might have to limit visitors during treatment. You also may be asked to stay a certain distance away from them.

Do implants give off radiation?

The type of implant you get will depend on the kind of cancer, where it is in your body, your general health, and other treatments you have had. If an implant is permanent, the radiation fades over time and at some point won't give off any more radiation.

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Overview

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Radiation therapy is a type of cancer treatment that uses beams of intense energy to kill cancer cells. Radiation therapy most often uses X-rays, but protons or other types of energy also can be used. The term "radiation therapy" most often refers to external beam radiation therapy. During this type of radiation, the high-energy bea…
See more on mayoclinic.org

Why It's Done

  • More than half of all people with cancer receive radiation therapy as part of their cancer treatment. Doctors use radiation therapy to treat just about every type of cancer. Radiation therapy is also useful in treating some noncancerous (benign) tumors.
See more on mayoclinic.org

Risks

  • Radiation therapy side effects depend on which part of your body is being exposed to radiation and how much radiation is used. You may experience no side effects, or you may experience several. Most side effects are temporary, can be controlled and generally disappear over time once treatment has ended. Some side effects may develop later. For example, in rare circumsta…
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How You Prepare

  • Before you undergo external beam radiation therapy, your health care team guides you through a planning process to ensure that radiation reaches the precise spot in your body where it's needed. Planning typically includes: 1. Radiation simulation.During simulation, your radiation therapy team works with you to find a comfortable position for you during treatment. It's imperative that you li…
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What You Can Expect

  • External beam radiation therapy is usually conducted using a linear accelerator — a machine that directs high-energy beams of radiation into your body. As you lie on a table, the linear accelerator moves around you to deliver radiation from several angles. The linear accelerator can be adjusted for your particular situation so that it delivers the precise dose of radiation your doctor has order…
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Results

  • If you're receiving radiation to a tumor, your doctor may have you undergo periodic scans after your treatment to see how your cancer has responded to radiation therapy. In some cases, your cancer may respond to treatment right away. In other cases, it may take weeks or months for your cancer to respond. Some people aren't helped by radiation therapy.
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Clinical Trials

  • Explore Mayo Clinic studiesof tests and procedures to help prevent, detect, treat or manage conditions.
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The Purpose of Radiation

  • The purpose of radiation is to use high-energy x-rays to kill cancer cells. About 60 percent of all people with cancer receive radiation therapy as part of their treatment program. In many cases, radiation may be the only type of treatment needed to treat patients. “As we set goals and treatment strategies for our patients, and work to make informe...
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Radiation Consultation

  • “The initial step for radiation treatment is a consultation so that the radiation oncologist can determine if and what type of radiation is indicated,” says Priti Patel, M.D., radiation oncologist at Riverview Medical Center.
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Pre-Treatment Planning/Simulation

  • The next step for treatment is to undergo a planning session to determine the treatment design: 1. You enter a large room with a CT scan machine. 2. You’ll be asked to lie flat on a treatment table. 3. Custom-made devices that conform to your body will be used to position the part of the body being treated within mm of accuracy. 4. Images will be taken with you in that position. 5. Coordi…
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Treatment Experience

  • Radiation therapy is performed outpatient. External beam radiation — the most common type of radiation therapy—is usually done daily Monday through Friday and lasts about 5 minutes. The treatments are typically painless. Patients usually are seen at least weekly by their radiation oncologist to discuss and manage side effects. Side effects are gradual and depend on the loca…
See more on hackensackmeridianhealth.org

Post-Treatment Follow-Up

  • Post-treatment follow-up will be determined by the radiation oncologist. “Typically, patients return to make sure they have recovered, and care is coordinated with other specialists to determine next steps, either systemic therapy or future scans,” Dr. Patel says. Whatever questions you may have, your radiation oncologists have a wealth of expertise and are there to support you every st…
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