Table 2.

A comparison of the standard deviations of the CT values in different regions of interest (ROIs)

ROI	WFBP	MARli	NMAR	p-value
				WFBP vs MARli	WFBP vs NMAR	MARli vs NMAR
ROI2	65.77 ± 61.04	63.51 ± 31.64	38.87 ± 19.04	0.642	0.000a	0.000a
ROI3	28.51 ± 18.76	45.04 ± 26.03	24.54 ± 8.55	0.000a	0.087	0.000a
ROI4	29.14 ± 18.07	38.95 ± 17.89	26.30 ± 11.74	0.000a	0.168	0.000a
ROI5	18.80 ± 5.10	18.87 ± 5.77	16.97 ± 3.29	0.911	0.001a	0.001a
ROI6	17.65 ± 3.98	16.52 ± 3.31	15.70 ± 2.69	0.005a	0.000a	0.040a

MARli, linear interpolation metal artefact reduction; NMAR, normalized metal artefact reduction; WFBP, weighted filtered back-projection.

Data are given as mean ± standard deviation unless otherwise indicated.

^aStatistically significant difference.