Patent ID: 7856084

Claim:
A method for activation of an emitter of a computed tomography scanner comprising a detector designed to receive an X-ray beam emitted by the emitter through an object to be analysed, and rotating supporting means, which are designed to support and rotate the emitter and the detector about said object; the method comprising: rotating the supporting means along a series of angular positions (αi); generating a succession of first pulses, each of which activates the detector in a respective angular position (αi) for acquiring a respective radiography of the object; and generating a succession of second pulses for activating the emitter in order to emit a radiation dose in each angular position (αi); associating with each angular position (αi) a respective radiation dose in such a way as to pre-define a distribution of radiation doses along the series of angular positions (αi); defining each said radiation dose by at least one parameter associated to the respective angular position (αi) so as to form said distribution of radiation doses; the method being characterized in that each said parameter is constituted by a duration of emission (Ti) of said x-ray beam associated with the respective angular position (αi), in that each of the first pulses has one and the same duration of emission (Ti) that is longer than the duration of exposure (TEX), and in that generating a succession of second pulses comprises: in the case of consecutive durations of emission (Ti) that are longer than the duration of exposure (TEX), generating just one second pulse is the angular positions (αi) associated with said durations of emission (Ti), said single second pulse being long to the extent that it leaves the emitter activated until said supporting means reach an angular position (αi) associated to which is a duration (Ti) that is shorter than or equal to the exposure interval (TEX).