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Prompt Events (II)
Scattered
events
●
One or both photons detected have
undergone a Compton interaction
●
Loss in energy and change in direction
●
Due to poor energy resolution, many
scattered photons cannot be discriminated
●
Wrong LOR assigned
Multiple
(triple) events
●
Three events from two annihilations detected
●
Event is disregarded
●
Proportional to count rate
ESTRO Teaching Course Advanced Imaging: PET – Basic Principles
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