Title :
Spatial resolution of iterative cone-beam CT reconstruction
Author :
Nielsen, Tim ; Köhler, Thomas ; Proksa, Roland ; Van Stevendaal, Udo
Author_Institution :
Tomographic Imaging Group, Philips Res., Hamburg, Germany
Abstract :
In this study, we apply the algebraic reconstruction technique (ART) to cone-beam CT volume reconstruction. We investigate the effect of various parameters on the spatial resolution of the images: volume grid size, number of iterations, and object size. Simulated data from an analytical phantom function are used to compute the resolution. The results are compared with analytical reconstruction using a cone-beam filtered backprojection algorithm (WEDGE).
Keywords :
algebra; computerised tomography; filtering theory; image reconstruction; image resolution; medical image processing; phantoms; algebraic reconstruction technique; analytical phantom function; cone-beam filtered backprojection algorithm; image spatial resolution; iterative cone-beam CT volume reconstruction; object size; volume grid size; Analytical models; Computed tomography; Data analysis; Image reconstruction; Image resolution; Imaging phantoms; Reconstruction algorithms; Smoothing methods; Spatial resolution; Subspace constraints;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2003 IEEE
Print_ISBN :
0-7803-8257-9
DOI :
10.1109/NSSMIC.2003.1352591
