Positioning Errors Analysis of Radiation Therapy with Different Fixation Methods after Modified Radical Mastectomy in Normal Weight and Overweight Breast Cancer Patients
Objective To investigate the effect of two different fixation methods,breast bracket and integrated body frame,on the positioning errors of fractionated radiotherapy in normal weight and overweight breast cancer patients.Methods Clinical data of 86 breast cancer patients who received radiotherapy after modified radical mastectomy from August 2021 to August 2022 were retrospectively ana-lyzed.Among them,there were 15 normal weight and overweight patients each using breast brackets,and 28 normal weight and overweight patients each using integrated body frames.5 sets of intersegmen-tal localization data of the patients in the X-,Y-,and Z-axis directions were recorded,and the segmental positioning errors of the normal weight and overweight patients using the two different fixation modes were analyzed.Results(1)Comparison of the positioning errors between normal weight and overweight patients using breast brackets and integrated body frames showed that the difference in positioning errors in the Z direction was statistically significant only for normal weight patients(P=0.021),while the difference in positioning errors in all other directions was not statistically significant(P＞0.05).(2)In normal weight patients,the error of the 1st placement in the Z direction was greater than the other subdi-rections when using the breast bracket,and the error of the 1st placement in the Y and Z directions was greater than the other subdirections when using the integrated body frame,and the differences were statis-tically significant(P＜0.05).(3)When using breast braces in overweightpatients,the 1st placement er-ror in the Y direction was greater than the other divisions,and the difference was statistically significant(P＜0.05);when using the integrated body frame,the 1st placement error in the X,Y,and Z directions was greater than the other divisions,and the difference between the first placement error in the Z direction and the other divisions was statistically significant(P＜0.05).Conclusion The integrated body frame can be used in place of the breast bracket to some extent to minimize the time cost;however,the breast bracket has a small intersegmental placement error,and it is recommended for overweight patients.
breast cancerbreast bracketintegrated body framepositioning error
万方数据
维普
