Accuracy of real-time respiratory motion tracking and time delay of gating radiotherapy based on optical surface imaging technique.

ABSTRACT:

Background

Surface-guided radiation therapy (SGRT) employs a non-invasive real-time optical surface imaging (OSI) technique for patient surface motion monitoring during radiotherapy. The main purpose of this study is to verify the real-time tracking accuracy of SGRT for respiratory motion and provide a fitting method to detect the time delay of gating.

Methods

A respiratory motion phantom was utilized to simulate respiratory motion using 17 cosine breathing pattern curves with various periods and amplitudes. The motion tracking of the phantom was performed by the Catalyst™ system. The tracking accuracy of the system (with period and amplitude variations) was evaluated by analyzing the adjusted coefficient of determination (A_R²) and root mean square error (RMSE).

SUBMITTER: Chen L 

PROVIDER: S-EPMC7350729 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature