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Gallium Arsenide System


Gallium Arsenide System for Low-Dose X-ray Imaging

Tech Area / Field

  • INS-DET/Detection Devices/Instrumentation

8 Project completed

Registration date

Completion date

Senior Project Manager
Suh G W

Leading Institute
Institute for High Energy Physics (IHEP), Russia, Moscow reg., Protvino

Supporting institutes

  • Siberian Physical Technical Institute, Russia, Tomsk reg., Tomsk\nScientific Research Institute of Semiconductor Devices, Russia, Tomsk reg., Tomsk


  • University of Glasgow / Department of Physics and Astronomy, UK, Glasgow\nRoyal Institute of Technology, Sweden, Stockholm

Project summary

We would like to convert new GaAs semiconductor technology developed for military purposes to a peaceful use. We propose a project in the interdisciplinary field of X-ray imaging, where the engineering (military) sciences interact with natural sciences and medical sciences.

We will develop a truly digital detector for medical imaging: a photon counting detector. Other "digital" X-ray imaging techniques are intrinsically analogue: response in each pixel is proportional to the total X- ray flux.

Photon counting is intrinsically digital method perfectly matching the digital nature of the photon flux: each photon is detected by counting signals above the threshold, thereby eliminating virtually all electronic noise. Other advantages of photon counting are the unlimited dynamic range and corresponding insensitivity to the exposure time. Counting allows a supplementary separation of photons according to their energy, arrival time, etc. This additional information can be used to enhance the image contrast and diagnostic value. The GaAs detector will have high detection efficiency paired with high resolution. A better image can be obtained with a reduced patient dose.

As the result of fulfillment the proposed project the GaAs detectors will be developed for a manufacture the principal new system X-rays imaging diagnostic. X-rays imaging will have the new step in their developing and society would benefit from a better medical X-rays imaging because it will:

- reduce the cancer rate by reducing the dose given to the population by medical X-rays;
- increase the X-rays searching frequency to detect cancer early;

Collaboration has an excellent record in engineering of the instrumentation for fast and efficient detection of inpidual photons and we believe that we will produce very competitive results.


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