Gamma Camera Structure and Function Quiz
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Questions and Answers

What is the function of the multi-hole collimator in the gamma camera?

  • To eliminate all photons except for scattered photons traveling obliquely to the axes of the apertures
  • To select only unscattered photons traveling in a direction parallel to the axes of the apertures (correct)
  • To select only scattered photons traveling in a direction parallel to the axes of the apertures
  • To allow only scattered photons to reach the PMT array
  • What happens to undesirable events involving scattered and unscattered photons traveling obliquely to the axes of the apertures?

  • They are eliminated by attenuation by one or more collimator septa (correct)
  • They are converted into desirable events by the position logic circuits
  • They are eliminated by energy discrimination within the patient
  • They are allowed to pass through and reach the PMT array
  • What is the main purpose of the gamma camera?

  • To select only the radiation coming and hitting the collimator perpendicularly (correct)
  • To yield mispositioned counts from scattered photons
  • To allow all types of radiation to pass through and reach the PMT array
  • To permit all undesirable events to reach the position logic circuits
  • What is the role of Compton scatter in undesirable events related to scattering within the patient?

    <p>Compton scatter yields mispositioned counts when not eliminated</p> Signup and view all the answers

    What is the main purpose of tomographic imaging?

    <p>To digitally stack several successive slices to form a three-dimensional image</p> Signup and view all the answers

    How are SPECT images beneficial in hybrid imaging?

    <p>For increased specificity and accurate depiction of disease localization</p> Signup and view all the answers

    What is the resolution of SPECT systems?

    <p>About 1cm</p> Signup and view all the answers

    How do tomographic images differ from conventional imaging?

    <p>Tomographic images provide more detailed information, while conventional imaging does not</p> Signup and view all the answers

    What does SPECT/CT hybrid imaging help correct?

    <p>Soft tissue from imaging</p> Signup and view all the answers

    What allows for rearrangement of the reconstructed 3D array at any angle relative to the patient's axis?

    <p>Reconstructed 3D images being contiguous with no inter-section gaps</p> Signup and view all the answers

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