The Dosimetric Impact of Shifts in Patient Positioning during Boron Neutron Capture Therapy for Brain Tumors

Table 3

Mean tumor dose () and 80 % dose () with a rotation and tilt of the patient head model to the center of beam exit surface.

Tumor; depth & dose	BL; Gy-Eq	R5; Gy-Eq; (± SD)	R10; Gy-Eq; (± SD)	R15; Gy-Eq; (± SD)	T5; Gy-Eq; (± SD)	T10; Gy-Eq; (± SD)	T15; Gy-Eq; (± SD)	R5 vs. BL; P-value	R10 vs. BL; P-value	R15 vs. BL; P-value	T5 vs. BL; P-value	T10 vs. BL; P-value	T15 vs. BL; P-value
	24.45	24.33; (± 0.38)	24.19; (± 0.15)	23.72; (± 0.24)	24.30; (± 0.30)	24.30; (± 0.49)	24.66; (± 0.88)	0.37	0.12	0.07	0.30	0.37	0.40
	20.00	20.08; (± 0.16)	20.04; (± 0.09)	19.7; (± 0.16)	20.14; (± 0.26)	20.07; (± 0.59)	20.41; (± 0.58)	0.30	0.34	0.12	0.30	0.45	0.25
	20.68	20.79; (± 0.15)	20.53; (± 0.07)	20.07; (± 0.19)	20.73; (± 0.07)	20.85; (± 0.14)	20.80; (± 0.26)	0.25	0.10	0.07	0.25	0.17	0.32
	20.00	20.12; (± 0.13)	19.79; (± 0.14)	19.21; (± 0.33)	19.98; (± 0.06)	19.91; (± 0.18)	19.71; (± 0.30)	0.33	0.11	0.09	0.16	0.23	0.17

BL: baseline; D: dose; R5: 5° rotation; R10: 10° rotation; R15: 15° rotation; T5: 5° tilt; T10: 10° tilt; T15: 15° tilt.