The University of Sydney;Western Sydney Local Health District;Katholieke Universiteit Leuven KU Leuven R&D
发明人:
Fulton, Roger,Nuyts, Johan,Sun, Tao,Kim, Jung-Ha
申请号：
AU2019271915
公开号：
AU2019271915A1
申请日:
2019.11.26
申请国别(地区):
AU
年份:
2019
代理人:
摘要：
#$%^&*AU2019271915A120191219.pdf#####ABSTRACT A method for the reduction of motion artifacts in computed tomography (CT) reconstruction imagery. The method includes the steps of: (a) reconstructing from a CT data set of measured projections from a detector at multiple angles about an object of interest, an initial estimate of the 3D attenuation distribution of the object of interest； (b) at each angle of the CT data set, a forward projection of the estimated 3D attenuation distribution within the object of interest and the CT projection measured at the same projection at the same angle are used to estimate a pose parameter set of the object of interest； (c) undertaking a further reconstruction from the measured projections, accounting for a pose change between two successive pose estimates from step (b) to produce a motion corrected estimate of the 3D attenuation distribution； (d) iterating steps (b) - (c) until the pose estimates obtained at all angles in two successive iterations differ by less than a predetermined convergence criterion； and (e) producing a final image reconstruction of a desired image size using a final pose estimate obtained at an end of step (d). FIGURE: 4 92254AUP014/6 4 V* . +#+....
