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