Journal of Jilin University Medicine Edition ›› 2015, Vol. 41 ›› Issue (01): 160-164.doi: 10.13481/j.1671-587x.20150131

Previous Articles     Next Articles

Application of V20 and V30 volume dose parameters in evaluating and forecasting radioactive lung injury caused by concurrent radiochemotherapy in treatment of locally advanced non-small cell lung cancer

DU Minjuan1, JIANG Zhenyu2, XU Xiaoguang3, LI Jie4, ZHANG Jin2   

  1. 1. Department of Oncology, Affiliated Hospital, Jilin Medical College, Jilin 132001, China;
    2. Department of Rheumatology, First Hospital, Jilin University, Changchun 130021, China;
    3. Department of Respiratory Medicine, General Hospital, Jilin Chemical Group Corporation, Jilin 132021, China;
    4. Department of General Surgery, General Hospital, Jilin Chemical Group Corporation, Jilin 132021, China
  • Received:2014-09-04 Published:2015-01-30

Abstract:

Objective To research the relationship between volume dose(Vd)parameters V20 and V30 of dose volume histogram(DVH)and radioactive lung injury caused by concurrent radiochemotherapy in the treatment of locally advanced non-small cell lung cancer(LANSCLC), and to clear whether V30 and V20 could evaluate the probability of radioactive lung injury in chemoradiation. Methods 36 patients treated with concurrent radiochemotherapy were retrospectively analyzed.Radiotherapy Ways : 3D-CRT, the conventional fractionation was 2 Gy/frack(F), 5 times/week, the total dose in concurrent chemoradiotherapy group was 66-70 Gy/30-33 F and the total dose in sequential chemoradiotherapy group was 60-70Gy/30-35F.Chemotherapy plan: Taxol 135 mg·m-2 at the 1st and 22nd days, Carboplatin AUC=6 g·L-1·min-1, at the 1st and 22nd days.The correlation analysis between the grade of level 2 or higher incidence of radioactive lung injury and DVH parameters(V30 and V20)was performed.And according to the whole lung average V30(18.17%)and V20(25.32%), the groups were set up: V30 ≤18%, V30>18% and V20≤25%, V20>25%, and the incidence of levels 2 or higher radioactive lung injury in each group was compared. Results There has positive correlation between levels 2 or higher lung injury classification and V20, V30(r=0.705, P<0.05;r=0.740, P<0.05);the incidence of levels 2 or higher lung injury was respectively 16.67% and 55.56% in V30 ≤ 18.00% group and V30>18.00% group, and there was significant difference(P<0.05);the incidence of levels 2 or higher lung injury was respectively 17.64% and 52.63% in V20 ≤25% and V20 > 25% groups, and there was significant difference(P<0.05). Conclusion V30 and V20 can be used to evaluate and forecast the incidence of radioactive lung injury;when V30>18% and V20>25%, the incidence of radioactive lung injury is significantly increased, and the treatment plan needs to be modified and even the design of treatment plan is given up.

Key words: cancer, non small cell lung, concurrent radiochemotherapy, radioactive lung injury, volume dose parameters

CLC Number: 

  • R734.2