Table 1.

Dosimetric parameters for normal brain tissues in the Ref‐plan and Rot‐plan (V_2Gy–V_16Gy).

Dosimetric	All (n = 29)		Single meta (n = 13)		Multiple mets (n = 16)
parameter	difference [cc]	P‐value	difference [cc]	P‐value	difference [cc]	P‐value
V16Gy	0.1 ± 0.3	<0.01	0.0 ± 0.0	0.06	0.2 ± 0.3	<0.01
V14Gy	0.1 ± 0.2	<0.01	0.0 ± 0.0	0.08	0.1 ± 0.2	0.02
V12Gy	0.1 ± 0.1	<0.01	0.0 ± 0.0	0.10	0.1 ± 0.2	0.02
V10Gy	0.0 ± 0.1	<0.01	0.0 ± 0.0	0.13	0.1 ± 0.1	0.01
V8Gy	0.1 ± 0.1	0.07	0.0 ± 0.0	0.35	0.1 ± 0.1	0.09
V6Gy	0.0 ± 0.2	0.36	0.0 ± 0.1	0.65	0.1 ± 0.2	0.35
V4Gy	0.1 ± 0.4	0.84	0.0 ± 0.2	0.75	0.1 ± 0.5	0.80
V2Gy	−0.1 ± 1.6	0.14	−0.1 ± 0.3	0.55	−0.1 ± 2.0	0.26