The present invention provides a parameter monitoring device and system for proton therapy. The device comprises: a recurrent neural network module, providing a trained recurrent neural network model, wherein the trained recurrent neural network model provides a nonlinear relationship between positron nuclide activity distribution and dose distribution of a proton beam; a PET obtaining module, obtaining, from a positron annihilation tomography system, a PET image of activity distribution of positron nuclides produced by a reaction between protons and tissues; a prediction module, inputting the PET image into the trained recurrent neural network model, and predicting the dose distribution and a Bragg peak position of the proton beam by means of the nonlinear relationship between the positron nuclide activity distribution and the dose distribution; a determination module, determining a positional relationship between the predicted dose distribution and Bragg peak position of the proton beam, and a target region; and an adjustment module, determining, according to a determination result of the determination module, whether a beam outlet parameter of the proton beam needs to be adjusted. The device and system provided in the present invention achieve the parameter monitoring and adjustment of proton therapy.
PARAMETER MONITORING DEVICE AND SYSTEM FOR PROTON THERAPY