Radiation therapy is one of the most commonly used treatments in cancer care, yet it is often misunderstood. Many patients come with fear and confusion—Is it like an electric shock? Is it a laser? Is it dangerous?

Let’s make it simple.

What Exactly Is Radiation?

Radiation therapy is not an electric shock.

It is not an electrical current.

And it is not a laser treatment.

Radiation therapy uses high-energy X-rays, similar to the X-rays used for scans—but much stronger. These high-energy rays target cancer cells and damage their DNA, preventing them from growing and multiplying.

The treatment is completely painless. You won’t feel anything during the session.

How Is Radiation Given?

Radiation is delivered using specialized machines called Linear Accelerator.

These machines:

* Produce high-energy X-rays

* Deliver radiation precisely to the required depth

* Target the tumor while sparing normal tissues as much as possible

Each treatment is carefully planned based on the patient’s condition.

Who Gives Radiation Therapy?

Radiation treatment is always a team effort involving trained specialists:

* Radiation Oncologist: Identifies the treatment area (called contouring) and prescribes the radiation dose

* Medical Physicist: Designs a detailed treatment plan, deciding how radiation beams should be delivered from different angles

* Radiation Technologist: Positions the patient correctly and delivers the treatment as per the approved plan

Both the oncologist and physicist review and approve the plan before treatment begins.

Does Radiation Affect Family Members?

No.

External radiation therapy does not make the patient radioactive. The radiation does not stay in the body after treatment, and it is not passed on to family members or people nearby.

Patients can safely interact with others.

Will Radiation Cause Hair Loss?

Not always.

Hair loss depends on the area being treated:

* If radiation is given to the brain or scalp, hair loss may occur in that region

* For treatments to other parts of the body, head hair is usually not affected

Any hair loss is typically localized, not whole-body.

Can Radiation Treat Only Cancer?

No.

Radiation therapy is used not only for cancers but also for certain non-cancerous (benign) conditions, such as:

* Keloid

* Schwannoma

* Pituitary Adenoma

In these cases, radiation helps control abnormal tissue growth.

Final Thoughts

Radiation therapy is not as scary as it sounds. It is a safe, precise, and effective treatment used worldwide.

Most fears arise simply due to a lack of awareness. Understanding the process helps patients feel more comfortable and confident during their treatment journey.

Dr. Jaswanthi A R

MBBS, MD (Radiation Oncology)

Consultant – Radiation Oncologist