Reirradiation of recurrent breast cancer with proton beam therapy: A case report and literature review

Table 1 Dose of organs at risk in the second course radiation therapy with proton beam therapy

Organ at risk	Minimum dose, Gy	Maximum dose, Gy	Mean dose, Gy
Spinal cord	0	1.37	0.06
Right brachial plexus	0.20	61.57	43.70
Heart	0	65.56	13.06
Left lung	0	65.60	7.38
Right lung	0	67.55	14.79
Esophagus	0	58.04	22.89