Table 1.

Characteristics of photodetectors for PET (Hergert, 2016)

Photodetectors	PMT	APD	SiPM
Spectral coverage (nm)	115–1,700	190–1,700	320–900
Gain (μ)	105–106	<100	105–106
Active area (mm2)	<12,000	<100	<10
NEP (W/$\sqrt{\mathit{Hz}}$)	>2 × 10−17	>1 × 10−15	>6 × 10−16
Rise time (ns)	>0.15	>0.35	>1
Time jitter (ns)	>0.05	>0.2	>0.2
Peak QE (%)	<40	<90	< 40 (PDE)
Bandwidth (Hz)	<2x109	<1x109	NA