TABLE 2

Collimator and Acquisition Efficiencies Using Simulated Disk Brain Phantom With and Without Scatter

Collimator and acquisition typeEfficiency with scatter (×10−5)Efficiency without scatter (×10−5)Efficiency with scatter/efficiency without scatter
HCB, CO7.39 ± 0.105.63 ± 0.081.31 ± 0.03
HCB, CH6.70 ± 0.125.10 ± 0.091.31 ± 0.03
FB, CO5.26 ± 0.074.05 ± 0.061.30 ± 0.03
FCB, CO4.98 ± 0.113.90 ± 0.091.28 ± 0.04
PB, CO2.94 ± 0.072.24 ± 0.051.31 ± 0.04

  • FB = fanbeam.