Considerations Of Counting And Imaging

Considerations Of Counting And Imaging

William Brooks

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Across

1. tested daily (uses Ce137)

3. influenced by atomic number and thickness of backing material

5. minimum detectable activity

7. fused to magnify and increse resolution of a small organ

8. used to include entire organ of interest

10. radiation produced by naturally occurring sources

12. most widely used type of multihole collimator

16. allows for recording of events after recovery

17. evaluates detector reliability from a statistical perspective

18. device used to eliminate all unwanted gamma rays except those of interest

Down

2. information is loss as a result

4. tested annualy

6. source, media between source and detector, and the detector influences this

9. is tested quarterly

11. sufficient numbers of gas atoms have recombined

13. sunject is positioned as close as possible to the face of the collimator

14. disintegrations of a radioactive atom

15. system cannot record another event

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