Table 6. FWHM, peak/valley dose and PVDR for microbeams at 5, 10 and 75 mm depth with and without the 375 µm transmission detector (TD) in place upstream.

Measurements are performed in the water phantom using the PTW microDiamond in 3 T mode with Al/Al filtration.

	5 mm depth			10 mm depth			75 mm depth
Parameter	With TD	Without TD	Difference (%)	With TD	Without TD	Difference (%)	With TD	Without TD	Difference (%)
FWHM (µm)	45.5	46.8	2.78%	46.1	45.8	−0.66%	48.4	47.9	−1.04%
Peak dose (Gray)	412.89	438.45	5.83	366.71	384.50	4.63	76.16	79.87	4.65
Valley dose (Gray)	22.51	24.03	6.32	22.59	24.09	6.21	6.94	7.01	1.03
PVDR	18.34	18.25	−0.53	16.23	15.96	−1.69	10.98	11.39	3.66