Molecular Imaging 2017

Basic principle of PET

– Coincidence detection in a detector ring

– Positron emitters (β+) used as biomarkers – Positron-electron annihilation  Two γ-quanta with 511 keV each are emitted under approx. 180 

Radioactive Isotope

511 keV γ-quant

γ

1

β +

Electron

γ

2

511 keV γ-quant

PET