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

Table 2 Artifact evaluation of cone-beam computed tomography images with iterative streak metal artifact reduction technique reconstruction using full volume of interest and small volume of interest

Artifact type	SMART-Full	SMART-Small			χ²	P value
		N	Y	Total
Radial	N	6	44	50
	Y	0	23	23
	Total	6	67	73	42.023	< 0.001
Streak	N	61	8	69
	Y	0	4	4
	Total	61	12	73	6.125	0.008
Thickening	N	51	5	56
	Y	2	15	17
	Total	53	20	73	0.571	0.453
Dark streak	N	36	11	47
	Y	0	26	26
	Total	36	37	73	9.091	< 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.