Gamma Knife, CyberKnife and MRI-Linac

Modern Precision Radiation Technologies

Gamma Knife, CyberKnife and MRI-Linac are advanced radiation technologies designed to treat selected tumors and lesions with high precision. They are different systems with different strengths, and the best option depends on diagnosis, tumor location, size, movement, prior treatment and specialist evaluation.

Gamma Knife Radiosurgery

Gamma Knife is a stereotactic radiosurgery platform mainly used for selected intracranial conditions. It delivers focused radiation to a precisely defined target inside the brain. It may be evaluated for brain metastases, meningioma, acoustic neuroma, pituitary adenoma, arteriovenous malformation and selected functional neurological disorders.

Potential Advantages of Gamma Knife

• Highly focused treatment for selected brain lesions.
• Non-invasive alternative in selected cases.
• Precise planning using MRI-based targeting.
• Often used in multidisciplinary neuro-oncology care.

CyberKnife Robotic Radiosurgery

CyberKnife is a robotic radiosurgery and stereotactic body radiotherapy system. Unlike Gamma Knife, CyberKnife may be used for selected tumors in different parts of the body, including brain, spine, prostate, lung, liver, pancreas and kidney, depending on the case and center capability.

Potential Advantages of CyberKnife

• Non-invasive robotic radiation delivery.
• Useful for selected moving targets with tracking technologies.
• Can treat selected tumors inside and outside the brain.
• May require fewer sessions in selected cases.

MRI-Linac / MR-Guided Radiotherapy

MRI-Linac combines a linear accelerator with magnetic resonance imaging. The main advantage is the ability to visualize soft tissues during radiotherapy and adapt the plan according to the patient’s anatomy on the treatment day. This is especially important for tumors near sensitive organs or tumors that move.

Where MRI-Linac May Be Useful

• Prostate cancer.
• Pancreatic tumors.
• Liver tumors.
• Rectal and pelvic tumors.
• Selected abdominal and thoracic tumors.

How to Choose Between Them?

There is no single best technology for every patient. Gamma Knife is highly specialized for brain targets. CyberKnife offers robotic stereotactic treatment for selected lesions throughout the body. MRI-Linac offers real-time MRI visualization and adaptive radiotherapy planning. A radiation oncologist decides the best option after reviewing imaging, pathology, tumor location and previous treatments.

Required Documents

• MRI, CT or PET/CT reports and images.
• Pathology report if available.
• Previous radiotherapy records and dose plans.
• Current diagnosis and treatment history.
• Neurological or oncology consultation notes.