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What Is CyberKnife Treatment and How Does It Work?

CyberKnife is an advanced cancer treatment system that uses robotic radiosurgery to treat tumours and other diseases without cutting into the body. Unlike traditional surgery, the CyberKnife does not involve any incisions or anaesthetic and can be used for tumours in many parts of the body, including the brain, spine, lungs, liver, prostate, and pancreas. It combines robotics with image-guided technology to deliver high-dose radiation correctly and precisely to the target area, minimising harm to nearby healthy tissues. This treatment is often recommended when traditional surgery is too risky or not possible. Because CyberKnife is non-invasive, most patients do not need to stay in the hospital and can continue their daily routine soon after sessions.

Purpose & Benefits of CyberKnife

● Non-invasive: no cuts or surgical wounds are made.

● Highly precise: delivers radiation from many angles and tracks tumour movement in real time.

● Short treatment time: typically between 1 and 5 sessions instead of many weeks.

● Minimal recovery time: most patients return to normal activities shortly after each session.

● Lower risk of side effects: healthy tissue is spared thanks to precision.

● Outpatient procedure: usually done without anaesthesia or hospital stay.

Who May Need CyberKnife?

● Patients with benign (non-cancerous) tumours that are hard to reach.

● People with malignant (cancerous) tumours where traditional surgery is risky.

● People whose tumours are near sensitive parts of the body (like the brain or spinal cord).

● Patients who have had radiation before and need very precise re-treatment.

● People who want a non-surgical option because of age or other health conditions.

Types of CyberKnife Treatment

Stereotactic Radiosurgery (SRS)

Despite its name, this is not traditional surgery. It is a special type of radiation therapy that delivers very high doses of radiation to a small, focused area. It is often used for brain tumours.

Stereotactic Body Radiation Therapy (SBRT)

This is similar to SRS but used for tumours in the body (such as lung, liver, or prostate). It delivers precise radiation in fewer sessions than traditional radiotherapy.

CyberKnife Procedure: Step-by-Step

1. Consultation & Imaging: Before treatment, the doctor will take images such as MRI or CT scans to see the exact shape and location of the tumour.

2. Treatment Planning: These images are used to create a detailed plan showing where radiation should be aimed.

3. Positioning: On the day of treatment, you will lie comfortably on the treatment table. The CyberKnife system tracks tiny movements (like breathing) so the beam stays focused.

4. Radiation Delivery: A robotic arm moves around you and delivers radiation from many angles. The system constantly checks the position of the tumour and adjusts as needed.

5. Short Sessions: Each session can last about 30 to 90 minutes, and you may complete treatment in 1–5 sessions.

6. Return Home: Because there are no cuts or anaesthesia, you can often go home right after the session.

Recovery & Aftercare

After CyberKnife treatment:

● You may feel tired or slightly uncomfortable, but most people return to normal activities quickly.

● Side effects are usually milder and shorter than traditional radiation because of precision targeting.

● Some patients have temporary fatigue, nausea, or mild redness near the treated area.

● Follow-up scans are scheduled to check how the tumour is shrinking or responding to treatment.

● Final effects on the tumour may take weeks to months after treatment to fully show.

Because the body’s response to radiation varies by individual and tumour type, it is important to attend all follow-up visits as advised by your specialist.

Risks & Possible Complications

CyberKnife is generally safe, but like any radiation treatment, it carries some risks:

● Radiation exposure can potentially affect nearby tissues, though precision reduces this risk.

● Fatigue or nausea after sessions is possible.

● Swelling in treated areas can occur.

● Rare tissue damage (necrosis) may happen in sensitive cases.

● Depending on location, there may be temporary discomfort in nearby organs.

Your radiation oncologist will explain risks specific to your condition before treatment begins.