Application of streak metal artifact reduction technique in cone-beam computed tomography guided percutaneous transthoracic needle biopsy

Table 1 Artifact evaluation on cone-beam computed tomography with original reconstruction and streak metal artifact reduction technique reconstruction with full volume of interest

Artifact type	Original	SMART-Full			χ²	P value
		N	Y	Total
Radial	N	51	1	52
	Y	19	2	21
	Total	70	3	73	14.45	< 0.001
Streak	N	69	0	69
	Y	4	0	4
	Total	73	0	73	2.25	< 0.001
Thickening	N	42	6	48
	Y	14	11	25
	Total	56	17	73	2.450	0.118
Dark streak	N	2	0	2
	Y	45	26	71
	Total	47	26	73	43.022	< 0.001

CBCT: Cone-beam computed tomography; SMART-Full: Streak metal artifacts reduction technique with a full volume of interest; SMART-Small: Streak metal artifacts reduction technique with a small volume of interest containing only the coaxial needle; N: No; Y: Yes.