Gamma Camera

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Gamma camera

A gamma camera is the equipment used to detect gamma rays in medical imaging.

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  • First, there is a lead collimator, this is a lead block with small holes in it.
  • The collimator will only allow gamma rays which have a straight path to pass through the grid.
  • Lead will absorb any none parallel gamma rays.
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  • A scintillator will create flashes of light when a gamma ray hits it.
  • The scintillator is directly after the collimator and will produce visible light rays.
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Photomultiplier tubes

  • After the scintillator, there are photomultiplier tubes.
  • These tubes amplify the light signal from the gamma rays.
  • These light flashes are then recorded electronically and create an image.

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