镍钛合金支架对食管放射治疗的影响

THE POTENTIAL EFFECT OF Ni-Ti STENT ON ESOPHAGEAL RADIOTHERAPY

目的:评价镍钛合金支架对食管放射治疗中吸收剂量可能产生的影响。方法:利用仿真体模,通过热释光元件,对镍钛合金支架置入食管前后的吸收剂量变化进行测量。结果:在照射剂量为2.0Gy 时,支架前方吸收剂量增加2.54%和侧方剂量增加2.01%,后方剂量减少了1.12%;在照射剂量为1.5Gy 时也有上述剂量变化的趋势。结论:食管放射治疗中镍钛合金支架引起的剂量变化影响存在,但剂量变化值较小,不会对食管放射治疗产生显著的影响。

Objective:To investigate the potential effct of Ni-Ti stent on the absorptive values in radiotherapy.Methods:Bionic body model were used to assess the dosage change before and after a Ni-Tistent placement.Result:When the dose 2.0Gy was adopted, absorptive dose dropped 1.12% behind stent and increased 2.01% at the locations lateral and 2.54% at the anterior to the stent;when the dose 1.5Gy was adopted,so it is.Conclusion:Absorptive dose change after a Ni-Tistent placement was smaller and it would not influence the effect of esophageal radiotherapy.