Cancer treatment has evolved significantly over the years, especially in the field of radiation oncology. Traditional radiotherapy techniques, while effective, often exposed nearby healthy tissues to radiation along with the tumour. Today, advancements in precision radiotherapy are changing that approach.
Modern technologies such as the CyberKnife radiosurgery system are helping radiation oncologists deliver highly targeted treatment with exceptional accuracy, improving tumour control while minimizing damage to surrounding organs and tissues.
Artemis Hospitals, Gurugram, uses advanced precision radiotherapy technologies to treat a wide range of cancers with a personalized and patient-centric approach. Among these innovations, CyberKnife has emerged as one of the most advanced non-invasive radiation treatment systems available today.
How Has Radiotherapy Evolved?
Radiotherapy has undergone a remarkable transformation over the decades. The shift from conventional radiation techniques to highly precise robotic systems has significantly improved treatment accuracy, patient comfort, and clinical outcomes.
The evolution of radiotherapy can broadly be divided into three distinct eras:
Two-Dimensional (2D) Radiotherapy
Earlier radiation therapy techniques used basic imaging and broad radiation beams to target tumours. While these treatments helped manage cancer, large areas of surrounding healthy tissue were often exposed to radiation, increasing the risk of side effects.
Three-Dimensional Conformal Radiotherapy (3D-CRT)
With the introduction of CT-based imaging, radiation oncologists gained the ability to visualize tumours in three dimensions. This allowed radiation beams to better match the shape of the tumour, improving targeting precision and reducing unnecessary radiation exposure to nearby healthy organs.
The Rise of Precision Radiotherapy
The next major advancement in cancer treatment came with image-guided and robotic radiotherapy systems capable of delivering radiation with extremely high precision. These technologies enabled clinicians to treat tumours more accurately while continuously adapting to tumour movement during treatment.
CyberKnife represents one of the most advanced developments in this evolution. By combining robotics, real-time imaging, and motion tracking, CyberKnife delivers highly focused radiation with sub-millimeter accuracy, even for tumours located in difficult or sensitive areas of the body.
Why Precision Matters in Cancer Care?
Precision plays a critical role in modern radiation oncology by enabling clinicians to destroy cancer cells effectively while minimizing radiation exposure to nearby healthy tissues and vital organs. Unlike conventional radiation techniques, which may expose surrounding tissues to higher radiation doses, precision radiotherapy delivers highly focused treatment that closely conforms to the tumour's shape, size, and location.
This level of accuracy offers several important clinical benefits:
- Improved tumour control: Higher radiation doses can be delivered directly to the tumour while maintaining treatment precision.
- Reduced damage to healthy tissue: Nearby organs and critical structures receive minimal radiation exposure.
- Lower risk of side effects: Reduced radiation to healthy tissues may help decrease treatment-related complications.
- Enhanced patient comfort: External Beam Radiotherapy (EBRT) treatments are non-invasive.
- Better treatment outcomes in difficult locations: Precision technologies can effectively target tumours located near sensitive organs such as the brain, spine, lungs, and liver.
Understanding CyberKnife: The Next Level of Precision Radiotherapy
CyberKnife is an advanced robotic radiosurgery system designed to deliver highly precise radiation treatment to tumours anywhere in the body. By combining robotics, real-time imaging, and motion tracking, the CyberKnife system delivers highly focused radiation with sub-millimeter accuracy while minimizing exposure to nearby healthy tissues.
How Does CyberKnife Deliver Precision?
CyberKnife uses advanced image-guided technology and a robotic arm to deliver radiation from multiple angles with exceptional accuracy. It continuously tracks tumour movement during treatment, especially in areas affected by breathing such as the lungs and liver, allowing radiation to remain focused on the tumour at all times.
What Makes CyberKnife Different?
Unlike conventional radiation therapy systems, CyberKnife can automatically adjust for natural body movement during treatment. This helps improve targeting precision while reducing unnecessary radiation exposure to surrounding organs and tissues.
Is CyberKnife- A form of Surgery?
Despite the name “radiosurgery”, CyberKnife is completely non-invasive. The treatment does not involve incisions, anesthesia, or hospitalization, and most patients can resume normal activities shortly after the procedure. Depending on the tumour type and location, treatment is usually completed in one to five sessions.
Artemis Hospitals, Gurugram offers advanced CyberKnife treatment supported by a multidisciplinary team of radiation oncologists, medical physicists, and radiation therapists focused on delivering personalized cancer care.
CyberKnife Treatment: Step-by-Step Process
CyberKnife (CK) treatment begins with a detailed evaluation of patient by radiation oncologists to determine whether the CK treatment is suitable for the patient’s tumour type, size, and location. The entire process is carefully planned to ensure highly precise radiation delivery while maintaining patient comfort throughout treatment.
Simulation and Positioning
Before treatment begins, a custom immobilization device may be prepared followed by CT simulation. It helps to minimize the movement of area to be treated and properly position the patient, ensuring accurate radiation dose delivery.
Imaging and Treatment Planning
High-resolution imaging such as CT, MRI, PET, DSA scans are performed to accurately identify the tumour and surrounding structures by fusing appropriate imaging like MRI/PET/DSA. The exact position and extent of tumour is mapped by the Radiation Oncologist. Using advanced treatment planning software, physicists create a personalized treatment plan.
SRS/SRT Treatment Delivery
Depending on the tumour type and treatment goal, CyberKnife may deliver the following:
- SRS (Stereotactic Radiosurgery): A single high-dose radiation session commonly used for small and well-defined tumours.
- SRT (Stereotactic Radiotherapy): Radiation delivered over multiple sessions for larger tumours or lesions located near sensitive organs.
During treatment, the robotic arm of CyberKnife delivers radiation beams from hundreds of different angles while continuously tracking tumour movement in real time. This allows precise dose delivery while minimising exposure to surrounding healthy tissues.
Follow-Up and Monitoring
Following treatment, regular follow-up appointments and imaging studies help monitor tumour response and assess overall treatment outcomes.
Implanting the markers
Certain forms of SBRT require markers to be inserted in the body before treatment planning.
What are the Different Types of CyberKnife Treatment Offered at Artemis Hospitals?
Artemis Hospitals, Gurugram, offers different types of CyberKnife treatments based on the tumour's location, size, and clinical requirements. These advanced radiation techniques are designed to deliver highly focused non-invasive treatment for a wide range of tumours in different parts of the body, while sparing surrounding healthy tissues and organs.
SRS (Stereotactic Radiosurgery)
SRS is typically used for small, well-defined tumors, particularly those located in the brain and spine. The treatment is usually completed in a single session using highly targeted radiation with exceptional precision. This approach helps treat the tumour effectively while minimizing exposure to surrounding healthy tissue.
FSRS (Fractionated Stereotactic Radiosurgery)
Some tumours may require treatment over multiple sessions instead of a single sitting. FSRS allows radiation to be delivered gradually across a few sessions, which can be beneficial for larger tumours or lesions located close to sensitive areas such as the optic nerves or brainstem.
SRT for Brain Lesions
Stereotactic Radiotherapy (SRT) is commonly used for brain metastases, recurrent brain tumors, and other intracranial lesions that require precise treatment over multiple sessions. This technique helps deliver focused radiation minimizing the dose to surrounding healthy brain tissue.
SBRT (Stereotactic Body Radiotherapy)
SBRT is used for tumours located outside the brain, including the liver, lungs, prostate, and abdomen. CyberKnife’s real-time motion tracking technology is especially helpful in these areas, as it continuously adjusts for natural body movements, such as breathing during radiation delivery.
What Types of Tumors Can Be Treated with CyberKnife?
The versatility of CyberKnife treatment extends across numerous cancer types:
Intracranial Lesions
- Brain metastases from lung, breast, and other primary sites
- Primary brain tumours (meningioma)
- Pituitary tumours and craniopharyngiomas
- Acoustic neuromas (vestibular schwannomas)
- Trigeminal neuralgia (non-cancerous but neurological condition)
- Arteriovenous malformations (AVMs)
Spinal and Vertebral Lesions
- Metastatic tumours to the spine
- Primary spinal cord tumours
- Vertebral hemangiomas
- Spinal arteriovenous malformations
Thoracic Malignancies
- Early-stage lung cancers
- Lung metastases from other primary cancers
Abdominal and Pelvic Malignancies
Soft Tissue and Other Sites
- Recurrent tumours previously irradiated
- Oligometastatic disease (limited distant metastases in carcinoma & sarcomas)
The adaptability of CyberKnife for tumour treatment across this broad spectrum of indications demonstrates its revolutionary impact on modern cancer care.
LINAC vs CyberKnife (SRS/SRT): Which Treatment Is Right for You?
Both Image Guided Radiation Therapy and CyberKnife Radiosurgery are advanced forms of radiation therapy designed to precisely target tumors while minimizing damage to surrounding healthy tissues. However, they differ significantly in delivery, duration, and ideal use cases.
Key Differences at a Glance
Feature | LINAC (Linear Accelerator) | SRS/SRT by CyberKnife |
Technology | Uses high-energy radiation beams generated by LINAC with advanced delivery techniques such as IMRT, VMAT, IGRT etc. | Robotic radiosurgery system with a compact LINAC mounted on a robotic arm and integrated real-time imaging |
Precision Level | High precision treatment with millimeter-level accuracy | Sub-millimeter precision with highly focused radiation delivery |
Tumour Tracking | Motion tracking (used in IGRT with DIBH) | Continuous real-time tumour tracking during treatment |
Treatment Areas | Commonly used for a wide range of cancers including head and neck, thorax, abdomen, pelvis etc. | Ideal for complex, small, or hard-to-reach tumours in brain, spine, lung, liver and prostate |
Motion Management | Done using immobilization techniques (abdomen compression, DIBH, respiratory gating etc.) | Automatically adjusts to tumour movement caused by breathing or body motion |
Treatment Sessions | Usually delivered in multiple sessions over several weeks | Often completed in 1–5 sessions |
Treatment Approach | Image-guided external beam radiotherapy | Stereotactic radiosurgery/radiotherapy with robotic precision |
Invasiveness | Completely non-invasive | Completely non-invasive |
Best Suited For | Larger tumours and conventional radiotherapy plans | Brain, spine, lung, liver, prostate, and recurrent tumours (small to medium sized tumours) |
Precision Radiotherapy at Artemis Hospitals: Excellence in Cancer Care
At Artemis Hospitals, we are committed to providing our cancer patients with the most advanced, evidence-based radiotherapy available. Our comprehensive radiotherapy program combines cutting-edge technology with physician expertise and patient-centered care.
Our Technology and Infrastructure
- State-of-the-art CyberKnife Robotic Radiosurgery System with real-time adaptive tracking
- Advanced IMRT Linear Accelerators with intensity modulation capabilities
- Integrated CT, MRI, and PET imaging for comprehensive treatment planning
- Sophisticated inverse planning algorithms enabling personalized treatment optimization
- Real-time quality assurance systems ensuring treatment precision
Multidisciplinary Team of Experts
Our multidisciplinary radiation oncology team includes:
- Board-Certified Radiation Oncologists with specialized training in cancer radiotherapy
- Accredited Medical Physicists ensuring physics precision and treatment safety
- Experienced Radiation Therapists administering treatments with precision and compassion
- Dedicated Nurses providing patient support and symptom management
Our Commitment to Quality
Artemis Hospitals is accredited by JCI and NABH and adheres to the highest standards of medical practice. We are committed to:
- Evidence-based treatment guided by latest oncology literature
- Patient safety through comprehensive quality assurance programs
- Personalized care tailored to individual patient circumstances
- Compassionate support throughout the cancer treatment journey
- Ongoing innovation in radiotherapy technology and techniques
Patient-Centered Approach
We recognize that cancer treatment represents one of life's most challenging experiences. Our commitment extends beyond technology to encompass:
- Comprehensive initial consultation with thorough explanation of treatment options
- Clear communication about expected outcomes and potential side effects
- Flexible scheduling accommodating work and family responsibilities
- Support services including nutritional counseling, psychosocial support, and survivorship programs
- Long-term follow-up ensuring sustained disease control and optimal quality of life
Article by Dr. S Jayalakshmi
Chief - Radiation Oncology & CyberKnife Centre
Artemis Hospitals
