Imaging for Physicists

Detected Events in PET  Detection event is valid (= prompt event) if ● Two photons are detected in coincidence window ● LOR is within valid acceptance angle ● Energy of both photons within selected energy window

B

A

C

τ ≈10 ns

2

True coincidence (A)

, scattered coincidence (B) , random coincidence (C)

24

ESTRO Teaching Course Advanced Imaging: PET – Basic Principles