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Imaging in medicine
Imaging in medicine

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6.3 How a gamma camera works

Activity 13

Before we look at a patient being imaged and some of the images which can be obtained using this technique, we will look in a bit more detail at how a gamma camera works. Watch the following video clip and note down the main components of the camera as you watch the clip.

Click to view part 2 of the clip about radionuclide imaging [1 minute 16 seconds]

Download this video clip.Video player: Positron emission tomography (PET)
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Positron emission tomography (PET)
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The main components of a gamma camera are:

  • the sodium iodide crystal;

  • the collimator; and

  • the photomultiplier tubes.

Figure 15 shows the components of a gamma camera. Further detail on these components can be found below.

Figure 15
Figure 15: Gamma camera