Hypofractionated image-guided breath-hold SABR (Stereotactic Ablative Body Radiotherapy) of liver metastases – clinical results

Table 1 Mean, median, minimal and maximal absolute doses to the PTV for different fractionation regimens

PTV dose parameter	Dose (Gy)
PTV dose parameter	(Mean value ± Standard deviation)
	*single-fraction*	*2 fractions*	*3 fractions*	*5 fractions*
	*SABR* (n = 12)	(n = 2)	(n = 3)	(n = 5)
D _mean	26,07 ± 1,81	27,16 ± 3,87	33,92 ± 1,37	59,51 ± 0,58
D _median	26,11 ± 1,79	27,12 ± 3,88	34,34 ± 1,47	59,89 ± 0,66
D _min	23,9 ± 1,85	21,23 ± 3,31	26,56 ± 2,46	50,92 ± 8,00
D _max	27,26 ± 2,06	29,3 ± 5,44	36,3 ± 0,89	62,48 ± 1,24
D ₉₉	24,2 ± 2,62	25,65 ± 4,0	32,6 ± 2,55	57,54 ± 3,19

D₉₉: Dose encompassing 99% of the PTV.
Abbreviations: D_min, minimal dose; D_max, maximal dose; D_median, median dose; D_mean, mean dose, PTV, Planning Target Volume.

ISSN: 1748-717X