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
ESTRO Teaching Course Advanced Imaging: PET – Basic Principles
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