Photon Detectors for Medical Imaging Applications

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Photon Detectors for Medical Imaging Applications

• - Large area (0.5 cm2) drift photodetectors and
  multi-element pixel arrays based high
  resistivity silicon (gt5000 ohm-cm), fully
  depleted p-i-n diodes.
• - Multi-Element Pixel arrays
• - Used in SPECT (single photon emission
  computed tomography) medical imaging
  applications.
• - Drift Detectors
• - Used in Anger cameras for medical imaging,
  for nuclear phsyics experiments, as x-ray
  flourescence detectors on SEMs and other
  industrial applications.
• - Two SNF prototypes now being produced at
  commercial processing facilities

Top view of 0.5 cm2 drift photodetector Central
hexagon is 80 micron diameter anode p hexagonal
rings focus the electric field for proper signal
collection.
User C. Tull, Photon Imaging, Inc., Northridge,
CA Principal Investigators B. Patt, J. Iwanczyk,
C. Tull, L. MacDonald NNUN Site Stanford
Univeristy