The Clinical Analysis of 19 Patients with Acute Radiation Pneumonitis Caused by Conventional Radiotherapy

Objective To analyse retrospectively the influence of irradiation dose and area on the incidence of acute radiation pneumonitis and the therapeutic efficacy of acute radiation pneumonitis in the conventional radiotherapy.Methods From December 1996 to December 2001,183 patients with lung cancer were treated with conventional radiotherapy.The dose was 2 Gy/fraction,1 fraction/day,5 days/week,accumulated dose was 50~70 Gy.Results The incidence of acute radiation pneumonitis was 10.4%.The incidences in patients recieved irradiation doses of 55 Gy below,55~65 Gy and 65 Gy above were 6%、8.7% and 15.6% respectively.The incidences for patients with irradiation area of 120 cm~2 below and 120 cm~2 above were 8.45% and 11.88% respectively.The remission rate of acute radiation pneumonitis was 84.21%(16/19) after therapy.Conclusion The incidence of acute radiation pneumonitis increases along with the irradiation dose and area in the conventional radiotherapy. Acute radiation pneumonitis may get obvious remission by reasonable treatments.