Radixact (Tomotherapy)
Radixact System: Precision Helical Radiation Therapy Technology
The Radixact® System represents the next generation of helical Tomotherapy®, combining continuous 360-degree radiation delivery with integrated real-time imaging. Engineered to deliver highly conformal intensity-modulated radiation therapy (IMRT) and stereotactic body radiation therapy (SBRT), Radixact allows radiation oncologists to treat complex, irregular, or multi-focal tumors while preserving healthy surrounding tissue.
How the Technology Works: Continuous Helical Delivery
Radixact operates on a CT-guided helical platform that treats tumors in a seamless, spiral motion rather than using traditional fixed gantry angles:
360-Degree Continuous Delivery: The linear accelerator rotates 360 degrees around the patient on a ring gantry while the motorized couch moves through the bore, delivering radiation continuously from all angles.
Ultra-Fast Multi-Leaf Collimator (MLC): Binary multi-leaf collimators open and close in milliseconds to shape and split radiation beams into thousands of narrow "beamlets".
3D Dose Conformity: The continuous delivery pattern enables precise dose shaping (sculpting) around complex target volumes, even when tumors wrap around critical organs like the spinal cord or brainstem.
Technical Features & Adaptive Capabilities
Radixact integrates advanced motion management and daily verification tools to maintain target accuracy throughout a treatment cycle:
Daily Crafms / KV-CT Image Guidance
Before every treatment, integrated imaging acquires daily kilovoltage CT (kVCT) scans to verify exact anatomical alignment, accounting for minor organ shifts, weight changes, or bladder filling.
Real-Time Motion Tracking (Synchrony® Technology)
The platform utilizes AI-driven real-time tracking (Accuray Synchrony®) to monitor tumor movement caused by breathing or organ motion, continuously adjusting the radiation beam in real time to follow the target.
Smart Adaptive Radiotherapy
If a tumor shrinks, changes shape, or shifts position over a multi-week course, clinicians can adjust and re-optimize the treatment plan directly using intra-procedural imaging data.
Key Clinical Applications in Oncology
Radixact is a versatile platform deployed across complex oncological cases requiring extreme precision:
Complex Head & Neck Cancers: Sculpts high doses to tumors while avoiding salivary glands, optic nerves, and swallowing structures.
Multi-Tumor & Extended Field Coverage: Treats large target areas or multiple metastatic sites simultaneously in a single, uninterrupted delivery run.
Total Marrow Irradiation (TMI / TMLI): Serves as a leading technology for targeted bone marrow irradiation prior to bone marrow transplants, minimizing radiation exposure to lungs, heart, and kidneys.
Re-Irradiation Protocols: Delivers targeted secondary radiation to previously treated areas with minimal spillover to surrounding healthy tissue.
Engineering Advantages, Cost & Patient Benefits
By unifying diagnostic CT imaging with 360-degree helical beam delivery, Radixact offers significant clinical, financial, and quality-of-life benefits:
Cost Efficiency: While a full course of Radixact helical Tomotherapy typically costs $25,000 to $50,000+ in the US and Europe, international patients can access the technology in accredited Indian oncology centers for $3,500 to $6,500 (achieving up to 75% to 85% cost savings).
Reduced Toxicity & Side Effects: Superior healthy-tissue sparing leads to fewer side effects like skin burns, fatigue, or long-term organ damage.
Non-Invasive Outpatient Care: Treatments are completely painless and non-invasive, with daily sessions usually completed in under 15–20 minutes.
Single-Pass Efficiency: Treats long or multi-focal anatomical areas in a single continuous movement, eliminating the need for multiple patient setups.
Frequently Asked Questions (FAQs)
How does Radixact differ from a traditional Linear Accelerator (Linac)?
Standard Linacs deliver radiation from a few fixed angles. Radixact uses a ring gantry that continuously rotates 360 degrees around the patient like a CT scanner, delivering thousands of targeted beamlets in a smooth, continuous spiral for higher dose precision.
Is Radixact radiation therapy painful?
No. The treatment is completely non-invasive and painless. Patients lie comfortably on the treatment couch as it slides through the gantry.
Why is daily CT imaging important during Radixact treatment?
Internal organs and tumors move slightly every day due to breathing, digestion, or weight loss. Daily CT imaging allows the system to verify exact positioning before turning on the beam, ensuring radiation hits only the target.
