Table 5.

Summary of subjective image quality score of different iterative reconstruction techniques [adaptive statistical iterative reconstruction (ASIR; GE Healthcare, Waukesha, WI), SafeCT (MedicVision^®, Tirat Carmel, Israel) and model-based iterative reconstruction (MBIR; GE Healthcare)] at 0.8 mGy

	ASIR 70/90			SafeCT CH0/CH1			MBIR
	Sufficient	Limited and unacceptable	p-value	Sufficient	Limited and unacceptable	p-value	Sufficient	Limited and unacceptable	p-value
Reader 1
Subsegmental bronchi	20/23	3/23	0.083	23/23		0.9	22/23	1/23	0.3
GGO	2/15	13/15	0.001	2/15	13/15	0.001		15/15	<0.001
Non-calcified lung nodules	12/18	6/18	0.001	12/18	6/18	0.001	9/18	9/18	0.005
Mediastinal lymph nodes	10/23	13/23	<0.001	11/23	12/23	0.001	18/23	5/23	0.025
Pericardium	2/23	21/23	<0.001	2/23	21/23	<0.001	3/23	20/23	<0.001
Reader 2
Subsegmental bronchi	21/23	2/23	0.16	23/23		0.9	21/23	2/23	0.16
GGOs	5/7	2/7	0.16	5/7	2/7	0.16	6/7	1/7	0.3
Non-calcified lung nodules	14/15	1/15	0.3	14/15	1/15	0.3	13/15	2/15	0.16
Mediastinal lymph nodes	18/23	5/23	0.025	19/23	4/23	0.046	22/23	1/23	0.3
Pericardium	18/23	5/23	0.025	19/23	4/23	0.046	21/23	2/23	0.16

GGOs, ground-glass opacities.

ASIR columns represent the average score of ASIR70 and ASIR90. SafeCT columns represent the average scores of two settings of SafeCT, CH0 and CH1. Empty boxes represent no data for that point [score of sufficient/limited and unacceptable (seen by number of lesions or patients/total number of lesions or patients) for diagnostic confidence].