Fig. 1.

Flow diagram of patient inclusion. NSCLC = non–small cell lung cancer, GVI = great vessel invasion, RT = radiation therapy, CCRT = concurrent chemo-radiotherapy. ^†All of the patients in this group received palliative RT alone, with a total dose of 20–48 Gy, of which the doses per fraction were 2.5–4 Gy. ^‡The reasons for incomplete CCRT were disease progression during the CCRT (n = 2), poor performance status (n = 3), patients’ refusal (n = 2), and comorbidities such as lung abscess (n = 2) and pneumonia (n = 1).