Insights into Imaging

Table 1 Comparisons of the attenuation and noise of vessel and artifact

From: Optimal combination periprosthetic vasculature visualization and metal artifact reduction by spectral computed tomography using virtual monoenergetic images in total hip arthroplasty

	CI	CI_MAR	VMI_MAR
	CI	CI_MAR	50 keV	60 keV	70 keV	80 keV	90 keV	100 keV	110 keV	120 keV
Attenuation (HU)
Vessel	387.26 ± 73.65	302.17 ± 62.81	542.52 ± 136.87	390.50 ± 90.73	299.15 ± 66.07	242.06 ± 53.50	204.77 ± 47.69	179.41 ± 45.25	161.55 ± 44.37	148.59 ± 44.28
Artifact	696.04 ± 218.17	490.82 ± 181.42	747.31 ± 281.64	581.37 ± 204.93	522.28 ± 174.86	469.36 ± 162.21	434.85 ± 158.17	411.86 ± 156.53	395.36 ± 157.14	383.38 ± 158.12
Noise
Vessel	37.42 ± 18.57	45.34 ± 27.78	64.61 ± 50.01	49.83 ± 34.86	41.36 ± 26.08	36.31 ± 20.97	33.20 ± 17.92	31.12 ± 15.99	29.79 ± 14.81	28.86 ± 14.01
Artifact	122.92 ± 53.34	82.08 ± 33.07	125.37 ± 64.79	116.57 ± 105.37	88.76 ± 37.15	80.68 ± 32.42	75.55 ± 29.99	72.0 ± 28.51	69.70 ± 27.75	68.08 ± 27.28
Width of artifact (mm)	48.51 ± 16.33	28.74 ± 9.97	35.93 ± 12.68	33.47 ± 12.11	29.25 ± 10.49	26.76 ± 10.37	25.53 ± 10.59	23.89 ± 10.61	22.91 ± 10.63	22.41 ± 10.69

CI conventional image, CI_MAR conventional image combined with orthopedic metal artifact reduction, VMI_MAR virtual monoenergetic images combined with orthopedic metal artifact reduction

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