METHOD AND APPARATUS FOR HELICAL WEIGHTING FOR FAST CT IMAGING

摘要

PROBLEM TO BE SOLVED: To provide a method for reconstructing a computed tomographic image of an object. SOLUTION: The method includes the step of helically scanning an object 22 with a multislice CT imaging system 10 to collect projection data; the step of identifying a center view of the collected projection data; the step of performing an operation selected from the group of helical interpolation and helical extrapolation on the collected projection data to produce super-views of the object; the step of weighting an angular range of the super-views with normalized helical weights which depend upon whether interpolation or extrapolation was performed; and the step of backprojecting the weighted super-views to produce a reconstructed image of the object.