表 4. The image quality scores of the two radiologists (n=47) .

两名放射科医师图像质量评分结果（n=47）

ltem	FBP	ASIR50%	ASIR70%	DL-L	DL-M	DL-H
ROI1: Region of interest in aorta; ROI2: Region of interest in muscle; ROI3: Region of interest in lung tissue.
Overall image quality/scores
Reader 1	1.85±0.36	2.89±0.31	3.83±0.38	2.96±0.20	3.85±0.36	4.81±0.40
Reader 2	1.87±0.34	2.91±0.28	3.81±0.40	2.89±0.31	3.87±0.34	4.74±0.44
Noise/scores
Reader 1	4.28±0.45	3.30±0.46	2.23±0.43	3.21±0.41	2.17±0.38	1.17±0.38
Reader 2	4.30±0.46	3.26±0.44	2.21±0.41	3.23±0.43	2.17±0.38	1.19±0.40
Artifact/scores
Reader 1	4.06±0.25	3.09±0.28	2.09±0.28	3.04±0.20	2.04±0.20	1.05±0.21
Reader2	4.09±0.28	3.11±0.31	2.06±0.25	3.06±0.25	2.09±0.28	1.06±0.25