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Development of a tracking error prediction system for the CyberKnife Synchrony Respiratory Tracking System with use of support vector regression
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Development of a tracking error prediction system for the CyberKnife Synchrony Respiratory Tracking System with use of support vector regression
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Development of a tracking error prediction system for the CyberKnife Synchrony Respiratory Tracking System with use of support vector regression
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Journal Article
Development of a tracking error prediction system for the CyberKnife Synchrony Respiratory Tracking System with use of support vector regression
2021
Overview
PurposeThe accuracy of the CyberKnife Synchrony Respiratory Tracking System is dependent on the breathing pattern of a patient. Therefore, the tracking error in each patient must be determined. Support vector regression (SVR) can be used to easily identify the tracking error in each patient. This study aimed to develop a system with SVR that can predict tracking error according to a patient’s respiratory waveform.MethodsDatasets of the respiratory waveforms of 93 patients were obtained. The feature variables were variation in respiration amplitude, tumor velocity, and phase shift between tumor and the chest wall, and the target variable was tracking error. A learning model was evaluated with tenfold cross-validation. We documented the difference between the predicted and actual tracking errors and assessed the correlation coefficient and coefficient of determination.ResultsThe average difference and maximum difference between the actual and predicted tracking errors were 0.57 ± 0.63 mm and 2.1 mm, respectively. The correlation coefficient and coefficient of determination were 0.86 and 0.74, respectively.ConclusionWe developed a system for obtaining tracking error by using SVR. The accuracy of such a system is clinically useful. Moreover, the system can easily evaluate tracking error.
Publisher
Springer Nature B.V
Subject
