EJNMMI Physics

Table 1 The recovery coefficient (RC) values for the sphere and kidney volumes generated for the sphere and cylinder calibration factors (CFs)

From: The effect of calibration factors and recovery coefficients on ¹⁷⁷Lu SPECT activity quantification accuracy: a Monte Carlo study

Objects	Sphere-RC	Cylinder-RC	% difference
Kidneys
L-K: 159 ml	1.18	0.99	16.1
R-K: 169 ml	1.18	0.99	16.1
Spheres
15.6 ml	0.92	0.77	16.3
24.4 ml	0.96	0.81	15.6.
33.5 ml	0.98	0.82	16.3
65.4 ml	1.00	0.84	16.0
		Average	16.1 ± 0.26

L-K Left kidney, R-K Right kidney, RC Recovery coefficient

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