R&D
VSI is leading the world’s soft X-ray static eliminator market.

Key Technology

CNT Digital X-ray Tube

CNT-based field emission
digital x-ray source

1. Since the X-ray was first discovered by Röntgen approximately 120 years ago, it has significantly contributed to the improvement of human life in many industries. It is a widely known fact that it had a significant impact on the development of the diagnostic imaging equipment industry.

2. These X-ray-based imaging devices consist of two essential elements: an "X-ray source" for emitting X-rays and an "X-ray detector" for detecting irradiated X-rays. Among them, the X-ray detector has already been converted from analog film to digital CMOS and TF. Based on this history, the concept called "digital x-ray image equipment" has begun to be derived.

3. However, the x-ray source still uses filament-based analog systems such as incandescent bulbs, and complete digital X-ray imaging equipment has yet to exist in the world.

4. To “fully control the pulse-shaped X-ray with high speed and accuracy,” which an analog device cannot achieve, VSI invented and commercialized a “CNT-based field emission digital X-ray source” with full digitization for the first time in history. Based on this, VSI is no longer relying on other leaders in the industry. Instead, we are becoming leaders in core X-ray component technology by providing a fully digitized product and expanding X-ray applications in the industry by allowing faster, smaller, more efficient, and higher resolutions.

CNT Digital X-ray Sources
Analog

Analog

Semi Digital

Semi Digital

100% Digital

100% Digital

Full digitization of X-ray equipment
  • The world’s first complete digitization of an X-ray source
    • Full digital high-speed pulse control below millisecond (1/1,000 sec)
    • Compact, light-weight product with ceramic-based individual seal structure
  • Generator module with an active current control function for CNT
  • Implementation of a tiny monobloc source based on an insulation/shielding complex
Applied VSI Nanotechnology

CNT-based nano electron source technology

Nano field emission tube structure technology

Nano field emission tube operating technology

Product development and technology
High dose X-ray tube

Technical Feature

  • Low Power Consumption
  • High Vacuum (Low 10-6 Torr) Sealing
  • Ceramic base
  • High current(dose) operation
  • Digital driving/controllable

Specification

  • Anode Voltage : 50kV max
  • Anode Current : 50mA max
  • Lifetime(Shot) : 500k
  • FSS(mm) : 0.3
  • Volume(mm) : 20⦶ x 68 mm
Portable dental X-ray tube

Technical Feature

  • Low Power Consumption
  • High Vacuum (Low 10-6 Torr) Sealing
  • Ceramic base
  • Ultra-compact X-ray tube
  • Field Emission technology
  • Digital driving / controllable

Specification

  • Anode Voltage : 70kV max
  • Anode Current : 1 ~ 4mA
  • Lifetime(Shot) : 500k
  • FSS(mm) : 0.4
  • Volume(mm) : 15⦶ x 61 mm
High energy X-ray tube

Technical Feature

  • Low Power Consumption
  • High Vacuum (Low 10-6 Torr) Sealing
  • Ceramic base
  • High energy operation
  • Field Emission technology
  • Digital driving / controllable

Specification

  • Anode Voltage : 100kV max
  • Anode Current : 1 ~ 20mA
  • Lifetime(Pulse) : 100hr(continuous)
  • FSS(mm) : 0.3
  • Volume(mm) : 20⦶ x 90 mm

Our CNT-based field emission digital X-ray source has the following features.

  • Ceramic based fixed anode, compact/lightweight with complete vacuum seal, three-pole field emission x-ray tube
  • Operation stability below 5% deviation by 100% digital operation and current control
  • Longevity (more than 500,000 shots) (Note: the CNT emitter is the world's only DC 20,000 hours operation longevity)
  • Application of the CNT field emission optimization technology with the usage of ceramic and metal material design, synthesis, pre- and post-processing technologies
  • Change of X-ray tube structure (X-ray irradiation position, reflection angle, length, heat dispersion design, etc.) according to customer requirements

This work was supported by Nano-Convergence Foundation(www.nanotech2020.org) funded by the Ministry of Science, ICT and Future Planning(MSIP, Korea)& the Ministry of Trade, Industry and Energy(MOTIE, Korea)