Industry-Verified Manufacturing Data (2026)

Multi-Leaf Collimator

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Multi-Leaf Collimator used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Multi-Leaf Collimator is characterized by the integration of Tungsten Leaves and Leaf Drive Mechanism. In industrial production environments, manufacturers listed on CNFX commonly emphasize Tungsten alloy construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A device used in radiation therapy to shape radiation beams to match tumor contours.

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Product Specifications

Technical details and manufacturing context for Multi-Leaf Collimator

Definition
A multi-leaf collimator (MLC) is a critical component of a medical linear accelerator used in radiation therapy. It consists of multiple thin tungsten leaves that can move independently to shape the radiation beam precisely to match the three-dimensional shape of a tumor while minimizing exposure to surrounding healthy tissues. The MLC enables intensity-modulated radiation therapy (IMRT) and volumetric modulated arc therapy (VMAT) by dynamically adjusting the beam shape during treatment.
Working Principle
The MLC operates by using computer-controlled motors to position individual tungsten leaves along the path of the radiation beam. Each leaf can extend into or retract from the beam's path, creating custom apertures. During treatment planning, the desired beam shape is calculated based on tumor imaging, and the MLC controller moves the leaves to the programmed positions, either statically for fixed fields or dynamically during beam delivery for modulated treatments.
Common Materials
Tungsten alloy, Steel (for housing and mechanisms), Electronic components (for control systems)
Technical Parameters
  • Leaf width at isocenter (typically 2.5-10 mm), determining the fineness of beam shaping. (mm) Per Request
Components / BOM
  • Tungsten Leaves
    Primary beam-shaping elements that attenuate radiation to create custom apertures
    Material: Tungsten alloy
  • Leaf Drive Mechanism
    Motorized system that positions individual leaves based on treatment plan coordinates
    Material: Steel, precision bearings, motors
  • Control Electronics
    Processes treatment plan data and controls leaf movements with sub-millimeter accuracy
    Material: Electronic circuits, processors
  • Position Sensors
    Monitor actual leaf positions and provide feedback to ensure accurate beam shaping
    Material: Optical or magnetic sensors
Engineering Reasoning
0.5-10.0 mm leaf positioning accuracy, 0.1-2.0 mm leaf width, 160-240 mm maximum field size
Leaf positioning error exceeding ±0.5 mm from commanded position, leaf transmission exceeding 2.0% of primary beam, leaf speed dropping below 20 mm/s
Design Rationale: Backlash in worm gear drive systems exceeding 0.1 mm, thermal expansion of aluminum leaf material at 23.6×10⁻⁶ K⁻¹ coefficient, stepper motor microstepping resolution loss below 1.8°/200 steps
Risk Mitigation (FMEA)
Trigger Worm gear backlash accumulation exceeding 0.15 mm due to wear
Mode: Leaf positioning error of ±0.8 mm causing 3% dose delivery inaccuracy
Strategy: Dual-encoder feedback system with 0.01 mm resolution and automatic backlash compensation algorithm
Trigger Stepper motor holding torque reduction to 0.18 N·m from 0.35 N·m design spec
Mode: Leaf drift of 0.3 mm during beam-on time over 120 seconds
Strategy: Closed-loop servo motors with 0.005 mm positional feedback and 0.01 N·m torque monitoring

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Multi-Leaf Collimator.

radiation therapy multi-leaf collimator tungsten alloy MLC for medical equipment precision beam shaping collimator MLC control system for radiotherapy medical machinery collimator components

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric (non-pressurized system)
other spec: Radiation dose rate: Up to 1000 MU/min, Leaf positioning accuracy: ±0.5 mm, Leaf speed: 0.5-3.0 cm/s
temperature: 15-35°C (operating), 5-45°C (storage)
Media Compatibility
✓ Medical-grade photon beams (6-18 MV) ✓ Electron beams (6-20 MeV) ✓ Proton therapy beams
Unsuitable: High-neutron flux environments (e.g., reactor applications)
Sizing Data Required
  • Maximum treatment field size (cm x cm)
  • Minimum leaf width/resolution (mm)
  • Required leaf overtravel distance (cm)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Leaf Positioning Inaccuracy
Cause: Wear in drive mechanisms (e.g., lead screws, motors) or encoder feedback errors due to contamination or electrical interference, leading to misalignment of radiation beams.
Mechanical Binding or Jamming
Cause: Accumulation of debris or dust on leaf tracks, thermal expansion mismatches, or lubrication degradation causing increased friction and potential motor overload.
Maintenance Indicators
  • Audible grinding or clicking noises during leaf movement indicating mechanical wear or obstruction.
  • Visual misalignment of leaves or inconsistent leaf positioning during calibration checks, suggesting drive or control system issues.
Engineering Tips
  • Implement regular preventive maintenance including cleaning of leaf tracks and verification of lubrication, coupled with periodic calibration using quality assurance tools like film or electronic portal imaging devices.
  • Ensure environmental control (temperature, humidity, and cleanliness) in the installation area to minimize thermal stress and contamination, and use redundant position verification systems to detect early drift.

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality Management Systems IEC 60601-2-1 - Medical electrical equipment - Part 2-1: Particular requirements for the basic safety and essential performance of electron accelerators in the range 1 MeV to 50 MeV ASTM E2303-20 - Standard Specification for Multi-Leaf Collimators Used in Medical Linear Accelerators
Manufacturing Precision
  • Leaf positioning accuracy: +/- 0.5 mm
  • Leaf end flatness: 0.2 mm
Quality Inspection
  • Leakage radiation test
  • Leaf positioning accuracy verification test

Factories Producing Multi-Leaf Collimator

Verified manufacturers with capability to produce this product in China

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✓ 97% Supplier Capability Match Found

P Project Engineer from Canada Feb 06, 2026
★★★★★
"Standard OEM quality for Machinery and Equipment Manufacturing applications. The Multi-Leaf Collimator arrived with full certification."
Technical Specifications Verified
S Sourcing Manager from United States Feb 03, 2026
★★★★★
"Great transparency on the Multi-Leaf Collimator components. Essential for our Machinery and Equipment Manufacturing supply chain."
Technical Specifications Verified
P Procurement Specialist from United Arab Emirates Jan 31, 2026
★★★★★
"The Multi-Leaf Collimator we sourced perfectly fits our Machinery and Equipment Manufacturing production line requirements."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

16 sourcing managers are analyzing this specification now. Last inquiry for Multi-Leaf Collimator from UAE (1h ago).

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Frequently Asked Questions

What materials are used in multi-leaf collimator construction?

Our multi-leaf collimators utilize tungsten alloy for radiation-blocking leaves, steel for durable housing and mechanisms, and electronic components for precise control systems.

How does a multi-leaf collimator improve radiation therapy accuracy?

The collimator's individually controlled tungsten leaves dynamically shape radiation beams to match tumor contours, minimizing exposure to healthy tissue while maximizing dose to cancerous cells.

What maintenance is required for multi-leaf collimators?

Regular calibration of position sensors, lubrication of leaf drive mechanisms, and software updates for control electronics ensure optimal performance and longevity in clinical environments.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Machinery and Equipment Manufacturing sector.

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