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Time-of-flight (TOF) PET
c
x
t
∆
=∆
2
•
In addition to the
coincidence
information, the
difference in flight time
is registered
•
Better SNR
•
Example:
Δt=500ps
Δx=?
(a) Localization without TOF,
(b) with TOF. Townsend, PMB 2008 [3]
ESTRO Teaching Course Advanced Imaging: PET – Basic Principles
21
cm
t c
5.7
5.0
=
∆⋅ ⋅
=∆