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. Author manuscript; available in PMC: 2017 Sep 21.
Published in final edited form as: Phys Med Biol. 2016 Sep 2;61(18):L38–L47. doi: 10.1088/0031-9155/61/18/L38

Figure 4.

Figure 4

Timing spectrum was measured at a threshold of 2.2 mV in the head-to-head measurements (a). The RMSE (b) and the ratio (c) of FWTM to FWHM in each timing spectrum were measured with 3 × 3 × 20 mm3 BGO crystals coupled with NUV-HD SiPMs as a function of threshold.