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

EJNMMI Physics

Table 6 RCs (%) of different acquisition time

	Time (s/frame)	37 mm	28 mm	22 mm	17 mm	13 mm	10 mm
32:1	5	106.95	88.73	62.68	63.13	60.54	65.16
	10	107.95	91.69	65.81	65.90	79.24	56.79
	20	108.60	91.89	71.77	70.44	72.52	65.60
	40	107.65	93.33	72.92	71.78	76.66	79.02
	60	107.80	94.66	73.57	70.86	76.84	71.53
	80	107.03	94.16	72.40	70.76	77.06	71.47
	100	106.92	94.40	72.97	70.94	75.35	68.91
	120	106.70	94.94	73.44	71.06	74.39	67.80
16:1	5	110.31	103.77	75.90	81.12	59.25	43.66
	10	110.49	100.87	77.71	80.73	67.05	35.59
	20	108.68	95.65	77.63	79.50	60.86	66.15
	40	104.55	97.85	75.80	75.59	58.92	65.15
	60	103.98	96.69	74.82	74.33	60.26	65.82
	80	105.21	97.14	74.00	75.02	62.69	70.83
	100	105.83	96.80	73.98	76.75	65.52	74.21
	120	106.57	97.53	75.37	76.64	63.44	75.91
8:1	5	89.75	89.79	74.99	71.09	48.65	98.87
	10	94.57	96.78	72.29	68.26	62.37	65.46
	20	101.43	92.18	78.06	72.69	84.84	92.74
	40	104.44	94.10	77.68	70.95	81.08	56.57
	60	105.14	94.96	74.50	71.64	70.88	53.06
	80	104.39	94.64	73.74	67.25	78.64	57.59
	100	103.85	96.58	72.37	72.04	78.16	54.77
	120	103.58	96.65	73.31	70.98	73.14	54.67
4:1	5	75.02	65.68	60.85	54.83	3.72	20.36
	10	91.33	76.63	72.05	44.15	26.79	18.01
	20	97.88	91.30	69.08	65.61	49.50	93.46
	40	102.02	92.37	74.92	65.15	29.80	55.07
	60	102.09	96.05	71.97	74.78	40.34	78.31
	80	103.36	97.70	71.71	79.94	46.03	77.28
	100	103.17	95.81	74.64	77.40	43.13	73.95
	120	102.89	96.64	75.93	74.79	53.82	67.59

Reconstruction parameters: 35 iterations, 20 subsets, No filter; AC + SC + RR correction. Acquisition parameters: 15% energy window