Title :
Computation of unmeasured third-generation VCT views from measured views
Author_Institution :
Appl. Sci. Lab., GE Med. Syst., Milwaukee, WI, USA
fDate :
7/1/2002 12:00:00 AM
Abstract :
We compute unmeasured cone-beam projections from projections measured by a third-generation helical volumetric computed tomography system by solving a characteristic problem for an ultrahyperbolic differential equation [John (1938)]. By working in the Fourier domain, we convert the second-order PDE into a family of first-order ordinary differential equations. A simple first-order integration is used to solve the ODES.
Keywords :
computerised tomography; differential equations; image reconstruction; medical image processing; Fourier domain; characteristic problem solution; cone-beam projections; first-order ordinary differential equations; measured views; medical diagnostic imaging; range conditions; simple first-order integration; third-generation helical volumetric computed tomography system; ultrahyperbolic differential equation; unmeasured third-generation VCT views computation; Computational geometry; Computed tomography; Concurrent computing; Detectors; Differential equations; Image reconstruction; Integral equations; Partial differential equations; Two dimensional displays; Volume measurement; Algorithms; Computer Simulation; Fourier Analysis; Imaging, Three-Dimensional; Phantoms, Imaging; Radiographic Image Enhancement; Sensitivity and Specificity; Signal Processing, Computer-Assisted; Tomography, Spiral Computed;
Journal_Title :
Medical Imaging, IEEE Transactions on
DOI :
10.1109/TMI.2002.801164
