HIGH FREQUENCY ANTI-SCATTER GRID MOVEMENT PROFILE FOR LINE CANCELLATION

摘要

A process for deploying an anti-scattering grid in a mammograph is provided. The mammograph comprises a radiation source configured to emit radiation for taking mammographic images of a patient, a radiation detector comprising a network of sensors arranged periodically with a first pitch, and an anti-scattering grid arranged between the source and the detector, the anti-scattering grid comprising radiation adsorbing strips arranged parallel to each other and distributed periodically with a second pitch. The process comprises: displacing the anti-scattering grid relative to the detector or displacing the detector relative to the anti-scattering grid during emission of radiation; adapting the second pitch to the first pitch, wherein displacement is perpendicular to the direction of the strips of the anti-scattering grid, the strips being arranged parallel to a side of the anti-scattering grid positioned against the patient, and altering the positions of the return points between successive periods of the displacement motion.

主权项

1. A mammograph comprising:
a radiation source configured to emit radiation for taking mammographic images of a patient; a radiation detector comprising a network of sensors arranged periodically with a first pitch;an anti-scattering grid arranged between the source and the detector, the anti-scattering grid comprising radiation adsorbing strips arranged parallel to each other and distributed periodically with a second pitch; and
at least one actuator configured to displace the anti-scattering grid relative to the detector or displace the detector relative to the anti-scattering grid during emission of radiation, wherein displacement is perpendicular to the direction of the strips of the anti-scattering grid, the strips being arranged parallel to a side of the anti-scattering grid positioned against the patient, and the locations of the return points are changed between successive cycles of the displacement motion.