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. Author manuscript; available in PMC: 2015 Jun 7.
Published in final edited form as: Phys Med Biol. 2014 May 13;59(11):2813–2828. doi: 10.1088/0031-9155/59/11/2813

Table 1.

Activity concentration in the XCAT phantom (arbitrary unit).

I-123 Tc99m Tc/I ratio
Background 13.2 10 0.76
Liver 31.6 60 1.90
Heart 26.4 100 3.79
Blood Pool 2.64 10 3.79
Lung 7.94 5 0.63
Defect 7.94 10 1.26