Aortic and Internal Carotid Atherosclerosis in Patients with Carotid Stenosis: Semiautomatic Volumetric Analysis of Low-Attenuation Plaque on Curved Planar Reformations Using MDCT Angiographic Data

Table 2

Comparisons of plaque volumes in aortic arch and ICA between 28 group 1 patients and 37 group 2 patients.

Volumes (mm^3) of uncalcified plaque	Group 1 patients	Group 2 patients	p-value
	< 70 years old	≥ 70 years old
	(n =28)	(n=37)
	Mean mm^3 ± sd	Mean mm^3 ± sd
Aortic arch
LPV	297.0 ± 266.4	447.6 ± 586.9	0.371
TUPV	2734.2 ± 1351.9	3996.7 ± 2450.0	0.002
LPV/TUPV ratio (%)	9.7 ± 5.9	9.1 ± 5.6	0.921
ICA
LPV	24.9 ± 22.5	44.1 ± 28.4	0.003
TUPV	183.8 ± 126.9	361.5 ± 118.3	< 0.001
LPV/TUPV ratio (%)	12.2 ± 7.3	11.4 ± 5.9	0.984

LPV: low-attenuation plaque volume, TUPV: total uncalcified plaque volume, sd: standard deviation.