The effect of different thickness of compensation film on the radiation dose of breast cancer
Objective To investigate the effect of different thickness of compensation film on the radiation dose of breast cancer.Methods 40 patients with breast cancer after radical mastectomy were selected.All patients were treated with three-dimensional conformal intensity modulated radiation therapy,with target areas including the chest wall and supraclavicular region.In the radiotherapy design,a 0.5 cm or 1.0 cm thick virtual equivalent tissue compensation film close to the patient's body surface was added to the chest wall surface,and the dose distribution and accelerator hops in the breast cancer radiotherapy plan WERE compared when the two thickness compensation films were compared.Results There was no significant difference in the target coverage,target uniformity index,target maximum dose,target minimum dose,target average dose and other dose parameters in the breast cancer radiotherapy plan when the two thickness compensation films were used(P>0.05).When the thickness of the compensation film was 0.5 cm,the number of accelerator hops was(113.64±11.73),while when the thickness of the compensation film was 1.0 cm,the number of accelerator hops was(125.83±12.52),and there was no significant difference between the two thickness.Conclusion Different thickness of compensation film has no significant effect on the dose distribution in breast cancer radiotherapy plan,but when the thickness of compensation film is 1.0 cm,it may lead to an increase in radiotherapy time and cost.Therefore,when making the radiotherapy plan,the patient situation and resource availability should be considered comprehensively,and the appropriate compensation film thickness should be selected to achieve the best radiotherapy effect.
Radical mastectomyBreast cancerRadiation doseCompensation film
万方数据
维普
