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Table 6 MAD per sphere diameter for all systems combined, using either vendor-specific or vendor-neutral reconstruction algorithms.

From: Towards standardization of absolute SPECT/CT quantification: a multi-center and multi-vendor phantom study

Sphere
diameter
RCmean RCmax
Vendor-specific Vendor-neutral Vendor-specific Vendor-neutral
37 mm 0.01 0.05 0.03 0.05
28 mm 0.10 0.02 0.16 0.04
22 mm 0.20 0.04 0.28 0.06
17 mm 0.11 0.04 0.18 0.11
13 mm 0.09 0.04 0.13 0.04