Table 3. Summary of experimental results for a broad-beam field for 3 T Al/Al, Cu/Al and Al/Al filtration modes.

The results show the percentage difference in response with and without the 375 or 10 µm transmission detector (TD) inserted upstream of the water phantom.

	375 µm TD		10 µm TD
	Min % difference	Max % difference	Min % difference	Max % difference
Al/Al	0.08 (75 mm depth)	3.83 (5 mm depth)	−0.18 (25 mm depth)	0.25 (5 mm depth)
Cu/Al	1.00 (75 mm depth)	3.45 (5 mm depth)	−0.15 (25 mm depth)	0.53 (15 mm depth)
Cu/Cu	0.65 (75 mm depth)	2.60 (5 mm depth)	−0.16 (5 mm depth)	0.14 (15 mm depth)