表 1. CT values of six kinds of reconstruction images (n=47) .

六种重建图像的CT值分析（n=47）

Rebuild method	ROI1/HU	ROI2/HU	ROI3/HU
ROI1: Region of interest in aorta; ROI2: Region of interest in muscle; ROI3: Region of interest in lung tissue.
FBP	45.33±8.47	64.31±5.83	−877.35±24.34
ASIR50%	45.32±8.39	64.19±5.62	−877.13±24.06
ASIR70%	45.19±8.34	64.14±5.57	−877.18±24.00
DL-L	45.98±7.97	64.75±5.17	−877.16±24.59
DL-M	46.06±7.85	64.72±5.01	−877.33±24.00
DL-H	46.00±7.71	64.70±4.83	−876.04±23.99
P	<0.001	0.003	<0.001