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. 2017 Mar 31;4(1):011013. doi: 10.1117/1.JMI.4.1.011013

Fig. 3.

Fig. 3

(a) A schematic of the ECAT II scanner developed by EG & G ORTEC in Oak Ridge, Tennessee showing the limited solid angle coverage of the early PET scanners; the design was based on the PETT III developed in St. Louis by Ter-Pogossian and coworkers, and (b) the first commercial PET scanner, the ECAT I, shown at UCLA.