Imaging for Physicists

Question: Time-of-flight

 Assuming the detector system of a PET scanner has a timing resolution of 500 ps. How long is the corresponding sector on a LOR, where the annihilation event was located?

1. 75 cm 2. 15 cm 3. 7.5 cm 4. 1.5 cm

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ESTRO Teaching Course Advanced Imaging: PET I