Table 1.
Demographic and clinical characteristics of the three groups.
Figure 1.
Comparison of IMT of ICAs in the three groups.
The results represent with mean±standard deviation.
Figure 2.
A: Scan from a 40-year-old healthy individual.
The diameter of the vessel is 7.5 mm, and the IMT is 0.64 mm. B: Scan from a 38-year old nasopharyngeal carcinoma patient with temporal lobe necrosis after radiotherapy shows narrowed vessel lumen (d = 2.2 mm, IMT = 7 mm) and the atherosclerotic plaque. It shows a more than 76% reduction in luminal diameter. Plaque is displayed with arrowhead.
Table 2.
Prevalence of plaque in ICAs in the three groups.
Figure 3.
Flow velocities of ICAs among three groups.
*Significant difference is found between Group 1 and control group (p<0.001). **Significant difference is found between Group 2 and control group (p<0.001).
Figure 4.
Flow velocities of MCAs and BA among three groups.
*The flow velocities of MCAs in Group 1 are much faster than those in control group (p<0.001). ** The flow velocities of MCAs in Group 2 are much faster than those in control group (p<0.001). Also, there is significant difference in MCAs flow velocities between Group 1 and Group 2 (p<0.001).