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Jaw Blade Component – Machinery and Equipment Manufacturing

Component Specifications

Definition

A high-density tungsten alloy component that forms part of the collimator jaw assembly in radiation therapy machines. These blades move independently to create precisely shaped radiation fields by blocking unwanted radiation, ensuring accurate targeting of tumors while minimizing exposure to healthy tissues. They operate within multi-leaf collimator systems for intensity-modulated radiation therapy (IMRT) and volumetric modulated arc therapy (VMAT).

Working Principle

Operates by linear motion along orthogonal axes to create rectangular or irregular radiation field shapes. Each jaw blade pair moves symmetrically from the central axis, with independent computer-controlled positioning to achieve sub-millimeter accuracy. The high-density tungsten material attenuates photon beams through photoelectric absorption and Compton scattering, with thickness calculated to provide required attenuation (typically 5-7.5 cm for 6-18 MV beams).

Materials

Tungsten alloy (W-Ni-Cu or W-Ni-Fe), 90-97% tungsten content, density 17-18.5 g/cm³, with nickel/copper/iron binder. Surface finish: ground to Ra 0.4 μm or better. Optional coatings: titanium nitride for wear resistance.

Technical Parameters

height 80-120 mm
length 150-300 mm
thickness 50-75 mm
surface_flatness ≤0.1 mm
positioning_speed 1-3 cm/s
radiation_leakage <0.5% of primary beam
attenuation_factor >1000:1 for 6 MV beams
positioning_accuracy ±0.5 mm

Standards

ISO 13485, IEC 60601-2-1, ISO 14971

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Jaw Blade.

Parent Products

This component is used in the following industrial products

Collimator Jaws

Movable metal blocks in a collimator system that shape and define the radiation field.

View Product Details

Engineering Analysis

Risks & Mitigation

Mechanical wear affecting positioning accuracy
Radiation leakage from material defects
Thermal expansion causing dimensional changes
Corrosion in humid environments

FMEA Triads

Trigger: Wear in drive mechanism components
Failure: Positioning inaccuracy exceeding ±1 mm
Mitigation: Regular calibration checks, use of wear-resistant materials in contact surfaces, preventive maintenance schedules

Trigger: Material impurities or voids
Failure: Increased radiation leakage >1%
Mitigation: 100% material certification, radiographic testing during manufacturing, quality control for density uniformity

Trigger: Thermal cycling during operation
Failure: Dimensional changes affecting field symmetry
Mitigation: Temperature compensation algorithms, thermal isolation, material selection with low thermal expansion

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

Positioning: ±0.5 mm, Flatness: ≤0.1 mm, Parallelism: ≤0.05 mm over 100 mm

Test Method

Laser interferometry for positioning accuracy, radiation film dosimetry for field edges, CT scanning for material integrity

Buyer Feedback

★★★★☆ 4.5 / 5.0 (34 reviews)

"The technical documentation for this Jaw Blade is very thorough, especially regarding technical reliability."

"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the Jaw Blade so far."

"Testing the Jaw Blade now; the technical reliability results are within 1% of the laboratory datasheet."

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Frequently Asked Questions

What is the primary function of jaw blades in collimators?

Jaw blades define the radiation field shape by blocking unwanted radiation, creating precise rectangular or irregular fields for accurate tumor targeting while protecting healthy tissues.

Why are tungsten alloys used for jaw blades?

Tungsten alloys provide optimal radiation attenuation due to high density (17-18.5 g/cm³) and atomic number, allowing thinner components with equivalent shielding compared to lead or steel.

How do jaw blades differ from multi-leaf collimators?

Jaw blades create rectangular fields with two pairs of opposing blades, while MLCs use many small leaves for complex shapes. Jaws often provide primary field definition with MLCs adding finer modulation.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Jaw Blade