Photon-counting spectral CT

Work with us to develop new CZT-based CT systems

There are three different uses for Kromek CZT, represented by three medical imaging applications. They represent a trade-off in performance between energy resolution (% FWHM) and gamma photon flux.

  1. For SPECT gamma cameras and surgical probes, the energy resolution can be very good (< 4.0% at 140 keV) because the photon flux is less than 1,000 photons per second per square mm detector area.
  2. A medium flux x-ray photon application is represented by bone mineral densitometry, where fluxes reach a few million photons per second per square mm area).
  3. The highest fluxes are represented by photon-counting spectral CT where fluxes reach hundreds of millions of x-ray photons per second per square mm detector area. The energy resolution for this colour CT application is approx 15-20% in the clinical range of 80-140 keV peak.

Photon-counting spectral CT is under development at our partner OEMs.

We have achieved fluxes > 100 million pps/mm2 without polarization of the CZT detector arrays. We are currently working to speed up the readout electronics to avoid pulse pileup and to compensate for inter-pixel charge sharing, including k-escape fluorescence.

Work with us to develop products for colour CT using CZT detector arrays.

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