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. Author manuscript; available in PMC: 2014 Dec 22.
Published in final edited form as: Nucl Instrum Methods Phys Res A. 2010 Mar 6;624(2):449–458. doi: 10.1016/j.nima.2010.03.004

Figure 14.

Figure 14

Plot of the gamma-ray spectrum from a 1.5mm × 1.5mm × 1.5 mm LYSO crystal irradiated with 22Na. Notice the resolution of the individual pixel multiplicity in the spectrum. Since each 511-keV event creates ~15,000 photons, we can readily see that the detection efficiency of the SSPM is less than 1%.