Application of surface monitoring system for thoracic tumors treated with intensity modulated radio-therapy
10.3969/j.issn.1006-5725.2024.17.014
- VernacularTitle:体表监测系统在胸部肿瘤调强放疗中的应用
- Author:
Ying CHEN
1
;
Fei CHEN
;
Xiaoqin GONG
;
Jian HUANG
;
Wuyang YANG
;
Tao YOU
;
Chunhua DAI
;
Jing HU
Author Information
1. 江苏大学附属医院放疗科(江苏镇江 212000)
- Keywords:
body surface monitoring system;
thoracic tumors;
IMRT;
setup errors
- From:
The Journal of Practical Medicine
2024;40(17):2435-2439
- CountryChina
- Language:Chinese
-
Abstract:
Objective To assess the feasibility of utilizing the ExacTracDynamic surface monitoring system(ETD)for setup and body surface monitoring in patients with thoracic tumors undergoing intensity-modulated radio-therapy(IMRT).Methods Patients receiving IMRT for thoracic tumors were included in this study.The enrolled patients were alternatively assigned to either conventional cross curve positioning(control group)or surface monitoring system-assisted positioning(experimental group).ETD X-ray images were utilized for calibration purposes prior to radiotherapy,enabling the determination of setup errors.A region of interest(ROI)was delineated on the body surface above the sternum,and real-time body surface monitoring was performed based on this ROI during radiotherapy.Post-radiotherapy X-ray images were obtained to verify patient position.Data regarding left-right(X),head-foot(Y),abdomen-back(Z),pitch,roll,and yaw directions were recorded and analyzed.Results A total of 60 patients were enrolled,with 754 fractions of radiotherapy in the control group and 718 fractions in the experimental group.The setup errors in the X and Z directions were significantly smaller in the experimental group compared to the control group(P<0.05).Moreover,there was a significant reduction in the number of setup errors≤0.50 cm for X,Y,and Z directions,as well as≤1.00° for Roll angle in the experimental group compared to the control group(P<0.05).Additionally,differences were observed between surface monitoring and X-ray image verification regarding position deviation along Y and Z directions(P<0.05),although these deviations remained within submillimeter levels on average.Conclusion Surface monitoring system-assisted positioning can enhance radiotherapy setup accuracy among thoracic tumor patients,particularly along X and Z directions.Furthermore,when setting ROI above sternum on body surface area,surface monitoring provides better reflection of target area's position deviation.
