Medipix2

Features

• High spatial, high contrast CMOS pixel readout chip
• Single photon counting mode (noise suppresion, superior SNR)
• Direct X-ray conversion
• accepts +/- charge
• Detector leakage current compensated pixelwise
• window in energy selectable
• choosable exposure times, data accumulated in 13bit counter/pixel
• Parallel/serial readout after exposure
• 2 threshold levels, allowing multi-spectral medical imaging
• noise per channel: ~110e- RMS

Parameters

• pixel size: 55μm
• CMOS technology: 0.25μm
• count rate per pixel: 300KHz
• active area: 2cm^2
• 256x256 pixel matrix

Applications

• X-Ray Imaging
  • X-Ray Diffraction (due to chip's high dynamic range) - commercialized by PANalytical
  • Phase contrast imaging with microfocus X-ray tubes
  • CT and Micro-CT
  • used as prototype digital readout for mammography, dental imaging, multi-spectral CT imaging
• Electron microscopy
  • electron cryo-microscopy
  • Low Energy Electron Microscopy (LEEM) (benefits from low noise and high dynamic range)
• Visible Single Photon Imaging
• Neutron Monitoring
• Tracking and Vertexing
• Mass Spectrometry
  • miniaturisation of molecular imaging mass spectrometry systems
• Sensor development

-- SotirisFragkiskos - 05-Sep-2011