The invention discloses an error
correction method based on a multi-leaf
collimator, and relates to the technical field of radiotherapy, and the error
correction method based on the multi-leaf
collimator comprises the following steps: an error modeling step: collecting position images of the multi-leaf
collimator at different rack angles through an
electron radiation field imaging device, calculating an error value between an actual position and an ideal position of the blade of the multi-blade collimator based on the position image, and constructing an
error function model
delta x = f (G, N, X) taking a rack angle G, a blade serial number N and a blade position X as independent variables; a plan correction step: obtaining a multi-leaf collimator motion sequence and a rack angle sequence of the
treatment plan; and calling the
error function model, and calculating a prediction error
delta x for each multi-leaf collimator leaf under each
control point in the
treatment plan. The error
correction method based on the multi-leaf collimator is used for improving the calculation precision of the
radiotherapy dose and reducing the
dose deviation caused by the
system error of the multi-leaf collimator from the source. The invention further discloses an error
correction system based on the multi-leaf collimator, a storage medium and an error correction device based on the multi-leaf collimator.