Is Radiation Therapy Safe For Cancer: Let’s Get To The Bottom Of It.

Cancer is typically treated with radiation therapy, surgery, or medications—including chemotherapy, hormonal therapy, and/or biologic therapy—used in combination or isolation. If a treatment plan includes radiation, the patient is referred to a radiation oncologist, a physician who specializes in using ionizing radiation to treat disease [1]. Radiation oncologists at specialized centers work with the primary doctor and other specialists to oversee care. Before we get into this topic further, let’s discover what radiotherapy really is.

How Does Radiation Work?

Radiation therapy, or radiotherapy, uses various forms of high-energy particles or waves to safely and effectively treat cancer and other diseases. Whether the goal is curing cancer, controlling its growth, or relieving symptoms such as pain, radiotherapy plays a vital role in modern oncology [2]. Radiation works by damaging the DNA of cancer cells, thereby inhibiting their ability to reproduce. Modern techniques allow clinicians to target tumors with high precision, in order to protect the healthy surrounding tissues.

In some cases, radiation therapy is the only treatment a person needs. At other times, it is part of the overall treatment regimen. For example, prostate and larynx cancer can in many cases be treated with radiotherapy alone, while breast cancer may be treated with a combination of surgery, radiation therapy, and chemotherapy. The clinical teams at the Onco-Life Cancer Centre are experts in delivering these integrated therapies.

When is Radiation Therapy Used for Cancer?

Sometimes, radiation therapy is used to increase the efficacy of the primary treatment. Radiation oncologists may choose to use radiotherapy in a number of different ways:

• Curative Intent: To destroy tumors that have not spread to other parts of the body.
• Adjuvant Therapy: To reduce the risk that cancer will return after surgery or chemotherapy by killing microscopic cancer cells that may remain [3].
• Disease Management: To slow down the cancer growth as much as possible.
• Palliative Care: To reduce symptoms caused by growing tumors, such as pressure or pain, and improve quality of life.

What are the Various Kinds of Radiotherapy Available?

While the goal of all radiation is to kill cancer cells while preserving healthy ones, there are several ways to do this. The treatment depends on the location, size, and type of cancer.

1. External Beam Radiation Therapy (EBRT): The oncology team uses a machine (linear accelerator) that generates high-energy X-rays or electrons aimed precisely at the cancer source.
2. Internal Radiation (Brachytherapy): This involves placing radioactive sources directly inside or near the tumor in your body [4].

Is Radiation Therapy Safe?

Is radiation therapy safe? This is a primary concern for patients. While “safe” in a medical context refers to the controlled, therapeutic application of radiation, it is important to note that like any potent medical intervention, it can cause side effects. However, radiation therapy has been used successfully around the world for over 100 years. Advances in imaging and computer-aided planning have significantly reduced the risks once associated with the treatment.

Is radiation therapy dangerous? When administered by a trained clinical team, it is highly controlled. The “danger” is mitigated by rigorous safety protocols and precise dosing.

How Do We Make Radiation Safer?

Before a patient receives radiotherapy, the radiation oncology team utilizes 3D imaging (CT or MRI) to tailor the plan. The aim is to focus on the cancer while avoiding healthy organs. Throughout the treatment, medical physicists and dosimetrists check and re-check the plan.

• External Radiation: The patient will not be radioactive when treatment ends because the radiation does not stay in the body.
• Internal Brachytherapy: If a patient undertakes brachytherapy, tiny radioactive sources will be implanted. In such a case, your radiation oncologist will explain the specific precautions to observe regarding contact with others during the treatment period.

Disclaimer: The information provided in this blog is for educational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website.

References

1. American Society for Radiation Oncology. (2022). What is a Radiation Oncologist?
2. National Cancer Institute. (2023). Radiation Therapy to Treat Cancer
3. Mayo Clinic. (2024). Radiation Therapy: Why it’s done
4. American Cancer Society. (2024). Internal Radiation Therapy (Brachytherapy)

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