---
title: "Multi-Leaf Collimator (MLC)"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:MULTI_LEAF_COLLIMATOR_MLC"
  data_integrity_hash: "bec9fd05e844f7374f8e2ac8d2eb5175"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:MULTI_LEAF_COLLIMATOR_MLC"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/multi-leaf-collimator-mlc.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/multi-leaf-collimator-mlc"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "Leaf positioning accuracy: ±0.5 mm at isocenter, leaf speed: 0.5-3.0 cm/s, maximum leaf travel: 20 cm"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 1.0
    unit: "mm"
    consequence: "Backlash accumulation in worm gear transmission exceeding 0.2 mm, permanent magnet DC motor demagnetization at temperatures above 80°C, optical encoder glass scale contamination reducing light transmission below 60%"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Worm gear tooth wear exceeding 50 μm clearance due to insufficient lubrication"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integrated oil-impregnated bronze worm gear bushings with automatic lubrication system maintaining 0.1 mm oil film thickness"
  - node_2:
      trigger: "Hall effect sensor magnetic field drift of 15 mT due to thermal expansion mismatch"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Temperature-compensated Hall sensor array with InSb semiconductor elements and Pt100 RTD thermal compensation circuit"
bom_nodes:
  tungsten-leaves:
    type: "component"
    urn: "URN:CNFX:ME:TUNGSTEN_LEAVES"
    interface_type: "physical-logic-coupled"
  leaf-drive-mechanism:
    type: "part"
    urn: "URN:CNFX:ME:LEAF_DRIVE_MECHANISM"
    interface_type: "physical-logic-coupled"
  position-sensors:
    type: "part"
    urn: "URN:CNFX:ME:POSITION_SENSORS"
    interface_type: "physical-logic-coupled"
  control-electronics:
    type: "part"
    urn: "URN:CNFX:ME:CONTROL_ELECTRONICS"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
  - standard: "CE MARKING - MEDICAL DEVICES REGULATION (MDR) 2017/745"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/multi-leaf-collimator-mlc.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "b91f6836eb089fb54ae69396c9b9853e58d435fb57578dd6b36f8428f81f6e6d"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Multi-Leaf Collimator (MLC)

## 1. Technical Definition
A device used in radiotherapy to shape radiation beams to match tumor contours.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **Leaf positioning accuracy: ±0.5 mm at isocenter, leaf speed: 0.5-3.0 cm/s, maximum leaf travel: 20 cm**. Failure boundary: **Leaf positioning error exceeding ±1.0 mm at isocenter, leaf motor torque dropping below 0.8 N·m, leaf position sensor resolution degradation beyond 0.1 mm**, Mechanism: **Backlash accumulation in worm gear transmission exceeding 0.2 mm, permanent magnet DC motor demagnetization at temperatures above 80°C, optical encoder glass scale contamination reducing light transmission below 60%**.

### 2.1 Analytical Physics Model
Governed by the **Rayleigh Resolution Criterion**:

> **Primary Equation**: $d = \frac{0.61 \lambda}{NA}$  
> **Engineering Impact**: Defines the theoretical limit of machine vision systems.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| \lambda | Wavelength | Engineering Constant |
| NA | Numerical Aperture | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Worm gear tooth wear exceeding 50 μm clearance due to insufficient lubrication | 8 | Leaf positioning hysteresis error of 1.2 mm at isocenter | Integrated oil-impregnated bronze worm gear bushings with automatic lubrication system maintaining 0.1 mm oil film thickness |
| Hall effect sensor magnetic field drift of 15 mT due to thermal expansion mismatch | 8 | Leaf position feedback error of 0.8 mm at 40°C operating temperature | Temperature-compensated Hall sensor array with InSb semiconductor elements and Pt100 RTD thermal compensation circuit |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | mm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Leaf drive mechanism](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/leaf-drive-mechanism.md) `(Standalone System)`
- [Position sensors](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/position-sensors.md) `(Standalone System)`
- [Control electronics](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/control-electronics.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Linear Accelerator**, **Treatment Planning System**, **Patient Positioning System**  
**Downstream Applications**: Customized Radiation Therapy Plans, Precision Tumor Treatments, Patient-Specific Beam Shaping  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What materials are used in Multi-Leaf Collimator construction?
**A**: Our MLCs are built with durable tungsten leaves for radiation shielding, steel alloys for structural integrity, and copper components for thermal and electrical conductivity in the drive mechanism.

### Q: How does the Multi-Leaf Collimator improve radiotherapy treatment?
**A**: The MLC dynamically shapes radiation beams to precisely match tumor contours, minimizing exposure to healthy tissue and enhancing treatment accuracy through automated leaf positioning controlled by advanced electronics.

### Q: What maintenance is required for the Multi-Leaf Collimator system?
**A**: Regular calibration of position sensors, inspection of tungsten leaves for wear, and software updates for control electronics ensure optimal performance. The steel alloy construction provides long-term durability with minimal maintenance.

## 6. Manufacturing Compliance
- ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS
- CE MARKING - MEDICAL DEVICES REGULATION (MDR) 2017/745

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Multi-Leaf Collimator (MLC)](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/multi-leaf-collimator-mlc)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **4** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: MULTI_LEAF_COLLIMATOR_MLC | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 0a2868ff
