Quantitative Effect of Metal Artefact Reduction on CT-based attenuation correction in FDG PET/CT in patients with hip prosthesis

EJNMMI Physics

Table 1 Quantiles of % change of SUV_mean around prostheses by MAR CT

Region	Acetabulum	Lat_neck	Med_neck	Shaft	Lat_diaph	Med_diaph
Minimum	− 2.36	− 0.98	− 2.52	− 8.33	− 3.57	0.00
5% quantile	− 1.39	− 0.72	2.23	− 6.16	− 1.54	0.00
25% quantile	0.00	1.83	4.08	− 2.88	0.00	0.75
50% quantile	1.43	4.04	7.84	0.00	1.53	1.42
75% quantile	4.21	7.81	12.37	0.00	3.20	2.75
95% quantile	11.86	11.39	33.73	6.34	7.21	6.70
Maximum	17.39	15.24	44.93	8.16	14.76	13.83
2-sided p§	***	***	***	*†	***	***
Lower limit¶	0.65	3.13	5.11	− 1.82	1.14	1.13

The table gives the quantiles of the percentual change of SUV_mean (in g/ml) in various regions around the prostheses induced by the use of MAR CT for PET attenuation correction
lat_neck lateral neck region; med_neck medial neck region; lat_diaph lateral diaphysis region; med_diaph medial diaphysis region)
^§on sign test. * = p < 0.05; ** = p < 0.01; *** = p < 0.001
^†and lower than 0, whereas in all other regions the median was higher than 0
^¶ of one-sided 95% confidence interval