EJNMMI Physics

Table 5 Comparison of RCs (%) between the 15% energy window and 20% energy window

From: Impacts of acquisition and reconstruction parameters on the absolute technetium quantification of the cadmium–zinc–telluride-based SPECT/CT system: a phantom study

	Energy window (%)	37 mm	28 mm	22 mm	17 mm	13 mm	10 mm	P value
32:1	15	106.70	94.94	73.44	71.06	74.39	67.80	0.023
	20	105.50	94.23	72.93	70.83	72.89	65.26
16:1	15	106.57	97.53	75.37	76.64	63.44	75.91	0.314
	20	104.94	96.93	75.36	77.38	63.79	74.35
8:1	15	103.58	96.65	73.31	70.98	73.14	54.67	0.919
	20	102.46	96.73	74.10	74.64	72.02	51.80
4:1	15	102.89	96.64	75.93	74.79	53.82	67.59	0.933
	20	104.26	96.31	79.16	77.13	57.10	58.69

Reconstruction parameters: 35 iterations, 20 subsets, No filter; AC + SC + RR correction. Acquisition parameters: 120 s/frame of acquisition time

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