Monte Carlo simulation of digital photon counting PET

EJNMMI Physics

Table 2 Comparison of the characteristics of the DPC-PET for NECR and scatter fraction between the experimental and Monte Carlo simulated data in this study

Parameter	Experimental	MC simulation	Rausch et al. [4]	Zhang et al. [5]
NECR @ peak value	159.4 kcps @ 54.9 kBq mL ⁻¹	175.6 kcps @ 52.4 kBq mL ⁻¹	153.4 kcps @ 54.9 kBq mL ⁻¹	171 kcps ^∗ @ 50.5 kBq mL ⁻¹
NECR @ 5.3 kBq mL ⁻¹	48.5 kcps	52.2 kcps	47.2 kcps	n/a
Scatter fraction @ peak NECR	33.2% @ 54.9 kBq mL ⁻¹	29.2% @ 52.4 kBq mL ⁻¹	33.9% @ 54.9 kBq mL ⁻¹	30.8% ^∗ @ 50.5 kBq mL ⁻¹
Scatter fraction @ low count rates	31.8% @ 0.4 kBq mL ⁻¹	30.3% @ 0.4 kBq mL ⁻¹	31.7% @ 0.4 kBq mL ⁻¹	n/a

Additional comparison is added from experimental data published from Rausch et al. [4] and Zhang et al. [5]. Values marked with an asterisk (^∗) represent ’maximum’ instead of peak values since the system did not show a peak value beyond which the NECR began to decrease with increasing activity