RayerKnife®
X-ray Stereotactic Radiotherapy System
Light as Instrument, Shadow as Guide
RayerKnife® utilizes a miniaturized linear accelerator, real-time image guidance throughout treatment, a high-precision robotic control system, and a six-degree-of-freedom treatment couch to deliver non-coplanar, non-isocentric irradiation across the entire spherical therapeutic space. This enables positioning error compensation therapy for static targets and synchronized tracking therapy for thoracic and abdominal moving targets, achieving precision dose delivery to provide patients with a safe, comfortable, and efficient tumor treatment solution.
Composition of the RayerKnife System
- 6MV FFF energy Dose rate: 1000 MU/min Provides full spherical spatial irradiation
- Integrated collimator auto-switching device Intelligent ant colony path planning optimization algorithm Single-pass treatment path planning
- High-precision 6D synchronization Translation accuracy: ±0.1 mm,Rotation accuracy: ±0.1° Rotation range: ±5°
- Three kV imaging units for full-process motion management Bony and fiducial marker tracking Orthogonal projection for lung target localization
- Real-time image-guided target tracking Predictive respiratory motion compensation Synchronized robotic arm adaptive irradiation
- Multi-modal fusion (CT, MR, PET, SPECT) Inverse optimization for full-sphere irradiation Monte Carlo dose calculation
- Full-cycle patient data management Equipment and user data management
- End-to-end treatment control with real-time patient positioning monitoring Instant registration for clinical reference Multi-layer safety interlock mechanism
Irradiation Technology
Global Spatial Irradiation
A groundbreaking dual-height isocenter design enables full-spherical treatment space, offering expanded beam angles—including irradiation from beneath the patient—to achieve superior dose distribution for spinal, paraspinal, and suboccipital tumors.
Non-Isocentric Irradiation
The robotic arm guides the beam to any designated position around the isocenter, enabling treatment of peripheral tumors and simultaneous multi-target therapy.
Dynamic Target Tracking Irradiation
Real-time tracking of internal target motion throughout treatment, with synchronized robotic arm movement to dynamically align the beam with moving targets.
Positioning error compensation irradiation
Image guidance continuously detects positioning errors during treatment, and the accelerator's robotic manipulator synchronously adjusts the beam position to ensure precise alignment with the tumor target.
Irradiation Technology
Linear Accelerator System
6MV FFF energy Dose rate: 1000 MU/min Head node count: 190 Body node count: 137 Supports full spherical space non-coplanar multi-field irradiation
Automatic Collimator Switching
Collimator field size: 5mm-60mm Three circular collimators installed simultaneously Rapid automatic switching during treatment Single-pass treatment path completion 3-second fast switching Positioning accuracy: 0.03°
Robot-Assisted Motion Tracking with Image Guidance
Real-time image-guided target tracking Predictive respiratory motion compensation Synchronized robotic arm adaptive irradiation Flat-panel detector effective imaging area: 400 mm × 400 mm Optical position sensor sampling rate: ≥20Hz
Spherical Space Treatment Planning
GPU based Monte Carlo Dose Calculation L-BFGS-B algorithm with quadratic programming inverse optimization Rapid optimization for multi-field and multi-objective planning Intelligent collimator combination GPU-accelerated dose calculation Irradiation paths: 12,000
Clinical Application
Treatment
Stereotactic Radiosurgery（SRS） Stereotactic Body Radiotherapy（SBRT)
Clinical Advantages
Submillimeter treatment accuracy: End-to-end system-wide submillimeter precision control ensures the accuracy of stereotactic radiotherapy Precision image guidance and motion tracking: Reduces PTV margins, protecting surrounding organs-at-risk and healthy tissues Automatic switching Control Device of multi-Collimator: Reducing treatment time Hypofractionated Radiotherapy: Effectively improves local control rates , enhances patients' long-term quality of life
