Title :
Tomographic artefacts suppression via backprojection operator optimization
Author_Institution :
Comput. Center, Novosibirsk, Russia
Abstract :
An approach is described for determining a vector of summation weights which gives the best approximation in backprojection operation for image reconstruction from projections. An algorithm for the best choice of summation weights is presented and their influence on the reconstruction quality in the case of few projections is illustrated. Extension of the approach to the projection decomposed parts is considered. The method suggested results in artefacts suppression and reconstruction accuracy improvement
Keywords :
computerised tomography; convolution; image reconstruction; medical image processing; optimisation; X-rays; approximation; backprojection operator optimization; image reconstruction quality; medical tomographs; parallel geometry; projections; reconstruction accuracy; summation coefficients; summation weights vector; tomographic artefacts suppression; tomographic convolution-backprojection; Computed tomography; Convolution; Fourier transforms; Geometry; Image reconstruction; Kernel; Null space;
Conference_Titel :
Image Processing, 1996. Proceedings., International Conference on
Conference_Location :
Lausanne
Print_ISBN :
0-7803-3259-8
DOI :
10.1109/ICIP.1996.559607
