Radiobiological restrictions and tolerance doses of repeated single-fraction hdr-irradiation of intersecting small liver volumes for recurrent hepatic metastases

Table 3 D90 (for α/β = 2) tested against various variables for correlation analysis.

PEARSON CORRELATION	D₉₀ (α/β = 2)
Interventions (n)	p = 0.004
Cumulative Pseudolesion (cm³)	p = 0.037
Interval: first irradiation - MRT (months)	p = 0.005
Interval: last irradiation - MRT (months)	p = 0.745
Mean interval between several interventions (ΣT/n)	p = 0.092

The D90 (for α/β = 2) correlated significantly positive with the number of interventions and the interval between the first irradiation and the last MRI (p < 0.05). There was a significant negative correlation between the D90 (for α/β = 2) and the volume of the cumulative pseudolesion (p = 0,037). There was a trend for a positive correlation (p = 0.092) between the D90 (for α/β = 2) and the mean interval between several interventions (ΣT/n).

ISSN: 1748-717X