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Table 1 Relative differences between estimated and simulated activities in a 9-mL sphere. The projections were simulated using a separate SIMIND simulation and then reconstructed using MCR (20 iterations)

From: Monte Carlo-based quantitative pinhole SPECT reconstruction using a ray-tracing back-projector

Offset (cm) Air Water
x y z Relative difference (%) Relative difference (%)
0 0 0 1.8 0.7
−2 0 0 2.0 0.8
2 0 0 2.1 0.8
0 −2 0 1.8 0.5
0 2 0 1.7 0.7
0 0 −2 2.1 0.8
0 0 2 1.7 0.4