Tungsten Alloy Multi-Leaf Grids in Radiotherapy Equipment

Tungsten alloy multi-leaf grids, also known as tungsten alloy Multi-Leaf Collimators (MLC), are precision beam control components installed in radiotherapy equipment such as medical linear accelerators. CTIA’s tungsten alloy multi-leaf grids use high-density tungsten alloys, with individual leaf positioning controlling beam collimation, field shaping, and dose modulation. Applications include three-dimensional conformal radiation therapy (3D-CRT), intensity-modulated radiation therapy (IMRT), and stereotactic radiation therapy, helping conform radiation fields to target volumes while reducing unnecessary exposure to surrounding healthy tissue.

1. Features of CTIA’s Tungsten Alloy Multi-Leaf Grids in Radiotherapy Equipment
(1) High-Efficiency Radiation Shielding: Density ranges 16.7–18.8 g/cm³, offering high attenuation against megavoltage X-rays generated by medical linear accelerators to reduce transmission and leakage radiation through optimized leaf thickness.
(2) Precise Field Shaping: Dozens of independently moving leaves combine positions to form regular or complex irregular beam fields, ensuring the irradiation zone tightly conforms to the tumor target area for superior conformal accuracy.
(3) High-Precision Motion Control: Utilizes servo drives and position feedback mechanisms to achieve rapid leaf positioning with mechanical placement accuracy down to ±0.1 mm.
(4) Low-Leakage Structure: Reduce radiation leakage between adjacent leaves through tongue-and-groove structures combined with rounded-end or flat-end designs.
(5) High Strength and Wear Resistance: Withstand repeated leaf movement through good strength, hardness, and wear resistance while maintaining structural integrity and positioning accuracy.
(6) Precision Machining and Compatibility: Machinable to match diverse accelerator models, leaf counts, leaf widths, and drive mechanisms, meeting stringent array assembly tolerance specifications.

2. Applications of CTIA’s Tungsten Alloy Multi-Leaf Grids in Radiotherapy Equipment
(1) Three-Dimensional Conformal Radiation Therapy (3D-CRT): Sets fixed MLC leaf configurations to form radiation fields matching 3D tumor contours, improving treatment region conformity.
(2) Intensity-Modulated Radiation Therapy (IMRT): Modulate radiation intensity across different regions through dynamic leaf movement, enabling complex dose distribution control.
(3) Stereotactic Radiosurgery (SRS): Deliver small radiation fields with high positioning accuracy for precise treatment of small targets such as intracranial lesions.
(4) Stereotactic Body Radiation Therapy (SBRT): Control treatment fields for small-volume targets in areas such as the lungs and liver, supporting precise dose delivery.
(5) Image-Guided Radiation Therapy (IGRT): Integrate with image-guidance systems to improve treatment-field positioning and delivery accuracy.

3. Specifications of CTIA’s Tungsten Alloy Multi-Leaf Grids in Radiotherapy Equipment
(1) Grades: 90WNiFe, 95WNiFe, 97WNiFe
(2) Density: 16.7–18.8 g/cm³
(3) Leaf Quantity: 40, 60, 80, or 120 pairs; customizable
(4) Leaf Width: 2.5 mm, 5 mm, etc.
(5) Leaf Structure: Flat end, rounded end, tongue-and-groove
(6) Machining Accuracy: Up to ±0.01 mm

Drawing on nearly 30 years of tungsten alloy manufacturing experience, CTIA GROUP specializes in precision manufacturing of tungsten alloy MLC leaves and related shields. CTIA controls material quality and machining tolerances while providing customized leaf dimensions, structural configurations, and mounting interfaces for different radiotherapy systems, ensuring accurate field shaping, reliable leaf movement, and long-term operational stability.

For any inquiry, please contact tungsten alloy manufacturer: CTIA GROUP

Email: sales@chinatungsten.com

Tel: 0086 592 5129696 / 0086 592 5129595

Website: tungsten-alloy.com

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