A method for controlling a photosensitive device, suitable to be exposed to a photon stream coming from a source of photons or of X-rays during a limited emission time (dx), comprising a column conductor (Y 1 -Y 3), row conductors (X 1 -X 3) and photosensitive points (P p), each photosensitive point (P p) being linked between the column conductor (Y 1 -Y 3) and one of the row conductors (X 1 -X 3), and comprising a photosensitive element (D p) suitable for converting a photon stream into electrical charges, and a transistor controlled by the corresponding row conductor (X 1 -X 3), the transistors being controlled in the off state during an acquisition phase in which the photon stream is converted into electrical charges, and being successively controlled in the on state during a reading phase so as to transfer, row by row, the electrical charges to the column conductor (Y 1 -Y 3), each transistor introducing, in the off state, a stray coupling capacitance between the corresponding photosensitive element (P p) and column conductor (Y 1 -Y 3), the method comprising the following steps: ▪ determining (21, 22) the electrical potential on the column conductor (Y 1 -Y 3) at a first and a second instant (t n), ▪ determining a difference in the electrical potential on the column conductor (Y 1 -Y 3) between the first and second instants, ▪ comparing the electrical potential difference with a predetermined threshold, step (21, 22) consisting in determining the electrical potential on the column conductor (Y 1 -Y 3) being repeated periodically as long as the potential difference between the last two determination instants is not greater than the predetermined threshold, the transistors being controlled in the off state at the first and the second instant, ▪ if the electrical potential difference is greater than the predetermined threshold, successively controlling the transistors so as to individually transfer the electrical charges of each photosensitive point (P p) to the column conductor (Y 1 -Y 3) so as to initiate the reading of the electrical charges in the event of a significant evolution of the electrical potential, the step of controlling the transistors is preceded by a waiting step, a duration of the waiting step being greater than a maximum duration (d x) during which the photosensitive device is likely to be exposed to a photon stream, the duration (T v) of the period between two successive determinations of the potential on a column conductor is less than a minimum duration (d x) during which the photosensitive device is likely to be exposed to a photon stream. ▪ determining (21, 22) the electrical potential on the column conductor (Y 1 -Y 3) at a first and a second instant (t n), ▪ determining a difference in the electrical potential on the column conductor (Y 1 -Y 3) between the first and second instants, ▪ comparing the electrical potential difference with a predetermined threshold, step (21, 22) consisting in determining the electrical potential on the column conductor (Y 1 -Y 3) being repeated periodically as long as the potential difference between the last two determination instants is not greater than the predetermined threshold, the transistors being controlled in the off state at the first and the second instant, ▪ if the electrical potential difference is greater than the predetermined threshold, successively controlling the transistors so as to individually transfer the electrical charges of each photosensitive point (P p) to the column conductor (Y 1 -Y 3) so as to initiate the reading of the electrical charges in the event of a significant evolution of the electrical potential, the step of controlling the transistors is preceded by a waiting step, a duration of the waiting step being greater than a maximum duration (d x) during which the photosensitive device is likely to be exposed to a photon stream, the duration (T v) of the period between two successive determinations of the potential on a column conductor is less than a minimum duration (d x) during which the photosensitive device is likely to be exposed to a photon stream.