Semiautomatic Volumetry of Low Attenuation of Thoracic Aortic Plaques on Curved Planar Reformations Using MDCT Angiographic Data with 0.5 mm Collimation

Table 3

Univariate correlations of each low attenuation and total noncalcified plaque volume on curved planar reformation with AAA, CAD, and hypertension.

Volumes (mm^3) of noncalcified largest plaque; mean ± sd	AAA	CAD; (≥50% stenosis)	Severe CAD; (≥90% stenosis)	Hypertension	Long-term; (≥10 years) hypertension
Ascending aorta
Low attenuation; 55.9 ± 63.8	−0.030; (0.774)	0.009; (0.934)	0.099; (0.339)	−0.117; (0.260)	0.204; (0.047)
Total; 2016.6 ± 985.3	−0.039; (0.707)	−0.033; (0.749)	−0.117; (0.259)	−0.051; (0.620)	0.040; (0.699)
Aortic arch
Low attenuation; 180.3 ± 115.9	0.643; (<0.001)	0.319; (0.002)	0.639; (<0.001)	0.332; (0.001)	0.662; (<0.001)
Total; 5515.0 ± 2121.4	0.434; (<0.001)	0.120; (0.247)	0.428; (<0.001)	0.241; (0.019)	0.351; (0.001)
Upper descending aorta
Low attenuation; 37.6 ± 39.8	0.117; (0.339)	0.046; (0.657)	0.213; (0.038)	0.010; (0.921)	0.132; (0.201)
Total; 2187.5 ± 1104.5	0.146; (0.159)	0.023; (0.822)	0.168; (0.102)	0.109; (0.293)	0.092; (0.372)

AAA: abdominal aortic aneurysm, CAD: coronary arterial disease; sd: standard deviation,  moderate correlation.