Patent ID: 8290116
Filing Date: 2012-10-16
Classification: A61B,G06T

Abstract:
1. An imaging apparatus for generating an image of a region of interest of an object, the imaging apparatus comprising: a radiation source for emitting radiation; a detector for measuring the radiation after having traversed the region of interest and for generating measured detection values depending on the measured radiation; an examination zone, in which the object is to be located; an attenuation element for attenuating the radiation before traversing the region of interest; a collimator for collimating the radiation emitted by the radiation source, the collimator being located between the attenuation element and the examination zone, wherein the radiation source, the detector and the collimator measure calibration values for different collimations of the radiation and wherein the attenuation element scatter values providing unit determines the attenuation element scatter values based on the calibration values, wherein the attenuation element scatter values providing unit determines the attenuation element scatter values by fitting a function, which considers an attenuation element scatter part and an unscattered part of the calibration values and which depends on the different collimations, to the calibration values; an attenuation element scatter values providing unit for providing attenuation element scatter values, which depend on scattering of the radiation caused by the attenuation element; a detection values correction unit for correcting the measured detection values based on the provided attenuation element scatter values; and a reconstruction unit for reconstructing an image of the region of interest from the corrected detection values.