Design of A Tidal Volume Measurement Device for Respiration Tracking of Radiosurgrical Robots

In radiotherapy of tumor, position changes of the tumor due to the respiratory movement of the patient will affect the accuracy of treatment. Therefore, the study of respiratory process is important for respiration tracking. In order to solve the problem of the difference between expiratory and inspiratory processes, a real-time tidal volume measuring device was proposed to measure the expiratory and inspiratory processes independently. Compared with the existing tidal volume collection devices, this design avoids the tidal volume measurement error caused by the difference between expiratory process and inspiratory process. Besides, the segmented tidal volume measurement is potentially feasible for the establishment of respiration tracking models. Several experiment results have validated the effectiveness and superiority of the proposed tidal volume measurement device.