Table 1 Calculated biological enhancement ratio’s (BER) values for mid- and distal spread-out Bragg peak (SOBP) proton irradiations, relative to the reference 6 MV X-ray irradiations.

From: Impact of proton therapy on the DNA damage induction and repair in hematopoietic stem and progenitor cells

 

Dose (Gy)

BER mid-SOBP

BER distal SOBP

Micronucleus assay

0.5

1.0

1.4

1.0

1.1

1.4

2.0

1.0

1.1

γ-H2AX foci assay (30 min)

1.0

1.0

1.0

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