2017_Imaging for Physicits_Florence

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Dead Time Correction
ESTRO Teaching Course Advanced Imaging: PET – Reconstruction, Contouring 5
 Measurement of dead
time with ‘decaying
source’
● Uniform source (18F, 11C) of
known activitiy
● Measurements of singles,
prompt and random
coincidence rates
 Construction of look-up
tables for dead time
correction factors
(a) Effect of dead time on count rate
linearity.
(b) Effect of shortening the signal
integration time (from [2]).
a
b