b) Gamma camera

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4 Terms

1
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  • state the components of a gamma camera


  • collimator

  • scintillator

  • light guide

  • photomultiplier tubes

  • circuits

  • computer


2
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  • explain the gamma camera scanning process


  • gamma photons travel towards the collimator

    • arrive at an angle → absorbed

    • arrive along the axis of the tubes → reach the scintillator

  • gamma photons hit the scintillator

    • produces thousands of visible light photons

  • visible light photons travel through the light guide into the photomultiplier tubes

  • one photon is converted into a voltage signal

  • voltage signals generate an image depending on concentration of the tracer


3
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  • state the difference between x-ray imaging and gamma imaging


  • x-ray imaging → shows anatomy

  • gamma imaging → shows functions and processes


4
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  • n/a


  • n/a