Application of Catalyst Optical Body Surface Monitoring in ABC-DIBH Radiotherapy for Left Side Breast Cancer
Objective To investigate the use of optical body surface tracking technology to monitor the effectiveness of breath holding and the repeatability of body position in deep inspiration breath hold radiotherapy for left breast cancer using active breathing control(ABC)technology,so as to ensure the consistency of inspiratory mode of patients in radiotherapy,reduce body position changes,and improve the accuracy of radiotherapy.Methods A total of 23 patients with left side breast cancer who were treated with ABC technology were monitored with Catalyst during the treatment of DIBH position,and the error data of both were recorded respectively with intra-session cone beam computed tomography(CBCT)as the reference standard.The correlation between the two groups of errors and the consistency of the two systems was evaluated by the Pearson method and the Bland-Altman method.The deduction of CBCT registration error value from the monitoring value of optical body surface was defined as the accuracy of Catalyst body surface monitoring.Results The deviation of the errors in the x,y and z translation directions monitored by Catalyst were(0.08±1.04),(1.44±2.15),and(0.45±1.69)mm,respectively.The CBCT registration values were(0.15±1.15),(1.51±2.28),and(0.44±1.81)mm,respectively.The r values of x direction and z direction were 0.60 and 0.77 respectively,showing a strong correlation,while the r-values of y direction were 0.82,showing a very strong correlation.95%CI values in the translation direction of x,y and z axis were[-2.01,1.86]、[-2.69,2.57]、[-2.32,2.34]mm respectively.The monitoring precision of x,y and z directions were(-0.08±0.99),(-0.06±1.34),(0.01±1.19)mm respectively.Conclusion Catalyst can effectively monitor the breath holding status of left breast cancer patients treated with ABC,accurately and real-time monitor the patient's position,improve the treatment accuracy,and have clinical application value.
Catalystoptical body surface trackingactive breathing controlleft side breast cancerradiotherapy
国家科技期刊平台
NSTL
万方数据
维普
