[year, person] first theorized positron
1828 - Paul Dirac
[year, person] coined term “positron”
1932 - Carl D. Anderson
annihilation possible?
conservation of matter
clinical applications of PET
brain
heart
oncology
[persons, year] developed the ACD
Michael Phelps
Edward J. Hoffman
Michael M. Terpogossian
[composition] PET detectors
8x8 scintillation
inorganic crystals which emit light photons
4 PMT -circular pattern around pt
[charac] bismuth geminate (BGO)
high stooping power
poor energy resolution
slow scintillation
septa composition
Pb/W
septa purpose
limits scattered rad’n from the object reaching the detector