TABLE 2.

Comparison of A+B/G and D+F/G Ratios Between Carbon and XPS Headrests in Patients with Cerebrovascular Disease (n = 43)

	A+B/G			D+F/G
Parameter	Carbon	XPS	P	Carbon	XPS	P
FBP Chang AC	0.96 ± 0.05	0.91 ± 0.05	<0.001^*	0.87 ± 0.04	0.87 ± 0.04	0.343
OSEM Chang AC	0.96 ± 0.05	0.92 ± 0.06	<0.001^*	0.88 ± 0.04	0.88 ± 0.04	0.938
OSEM CTAC	0.89 ± 0.04	0.89 ± 0.05	0.893	0.86 ± 0.03	0.86 ± 0.03	0.099

↵* Statistically significant.