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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

ESTRO Teaching Course Advanced Imaging: PET I

23