10 Questions
What is the function of the multi-hole collimator in the gamma camera?
To select only unscattered photons traveling in a direction parallel to the axes of the apertures
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
What is the main purpose of the gamma camera?
To select only the radiation coming and hitting the collimator perpendicularly
What is the role of Compton scatter in undesirable events related to scattering within the patient?
Compton scatter yields mispositioned counts when not eliminated
What is the main purpose of tomographic imaging?
To digitally stack several successive slices to form a three-dimensional image
How are SPECT images beneficial in hybrid imaging?
For increased specificity and accurate depiction of disease localization
What is the resolution of SPECT systems?
About 1cm
How do tomographic images differ from conventional imaging?
Tomographic images provide more detailed information, while conventional imaging does not
What does SPECT/CT hybrid imaging help correct?
Soft tissue from imaging
What allows for rearrangement of the reconstructed 3D array at any angle relative to the patient's axis?
Reconstructed 3D images being contiguous with no inter-section gaps
Test your knowledge about the components and function of a gamma camera used in nuclear imaging. Learn about the collimator, PMT array, position logic circuits, and other circuitries involved in the imaging process.
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