A method for the real-time control of exposure to an X-ray dose emitted by a generator tube for generating an X-ray beam and received by a detector includes a flat panel detector, comprising a set of pixels organized into a matrix along rows and columns and configured so as to generate signals on the basis of the X-ray dose impinging on the detector, the generator tube comprising a control unit for controlling the generator tube that is configured so as to control an emitted X-ray dose, the control method comprising the following steps: exposing the flat panel detector to an X-ray dose emitted by the generator tube for generating an X-ray beam; repeatedly reading out at least one of the rows of pixels while the flat panel detector is exposed to the X-ray dose; determining a payload signal and a stray signal based on the signals from the readout of the at least one of the rows; transmitting the payload signal to the control unit for controlling the generator tube.