Pencil Beam Spectral Measurements of Ce, Ho, Yb, and Ba Powders for Potential Use in Medical Applications

Table 3

Filters used in dual-kVp technique.

kVp (keV)	Areal density; (g/cm^2)		RMSErel		CV (%)
	Ho	Yb	Ho	Yb	Ho	Yb
70	0.7619	0.8076	0.0112	0.0120	0.1018	0.0980
80	0.7619	0.9422	0.0118	0.0101	0.0931	0.1035
90	0.8795	1.0095	0.0159	0.0099	0.1067	0.1035