Cells Treatment α (Gy-1) control β (Gy-2) control α-enhanc factor β-enhanc factor RKO ip sham 0.55 ± 0.09 0.02 ± 0.01       HT 41 1h 0.93 ± 0.09 0.05 ± 0.02 1.7 2.5 RKO dp sham 0.47 ± 0.09 0.01 ± 0.01       HT 41 1h 0.83 ± 0.08 0.07 ± 0.02 1.8 7.0 SW1573 ip sham 0.21 ± 0.02 0.06 ± 0.02       HT 41 1h 0.06 ± 0.02 0.11 ± 0.03 0.3 1.8   HT 43 1h 0.49 ± 0.04 0.12 ± 0.03 2.3 2.0 SW1573 dp sham 0.09 ± 0.02 0.06 ± 0.02       HT 41 1h 0.05 ± 0.02 0.08 ± 0.02 0.6 1.3   HT 43 1h 0.40 ± 0.04 0.11 ± 0.03 4.4 1.8 Sham=control is radiation only; ip=immediately plated; dp=delayed plated.

Table 4: Values of the linear-quadratic parameters a and ß and enhancement factors from cells treated with ionizing radiation only and after combined radiation and hyperthermia treatment.