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Basic principle of PET
– Positron emitters (β+) used as
biomarkers
– Positron-electron annihilation
Two γ-quanta with 511 keV each
are emitted under approx. 180
– Coincidence detection in a detector
ring
Radioactive
Isotope
511 keV
γ-quant
511 keV
γ-quant
Electron
β
+
γ
1
γ
2
PET