Title :
Compensation of Some Time Dependent Deformations in Tomography
Author :
Desbat, Laurent ; Roux, Sébastien ; Grangeat, Pierre
Author_Institution :
Faculte de Medecine, Joseph Fourier Grenoble Univ., La Tronche
Abstract :
This work concerns 2D+t dynamic tomography. We show that a much larger class of deformations than the affine transforms can be compensated analytically within filtered back projection algorithms in 2D parallel beam and fan beam dynamic tomography. We present numerical experiments on the Shepp and Logan phantom showing that nonaffine deformations can be compensated. A generalization to 3D cone beam tomography is proposed
Keywords :
affine transforms; biomechanics; computerised tomography; deformation; medical image processing; motion compensation; phantoms; 2D parallel beam dynamic tomography; 3D cone beam tomography; affine transforms; fan beam dynamic tomography; filtered backprojection algorithms; phantom; time dependent deformation compensation; Algorithm design and analysis; Attenuation; Computed tomography; Geometry; Heart; Image reconstruction; Image sampling; Imaging phantoms; Motion compensation; Projection algorithms; Analytic reconstruction; deformation compensation; dynamic tomography; Algorithms; Artifacts; Imaging, Three-Dimensional; Motion; Radiographic Image Enhancement; Radiographic Image Interpretation, Computer-Assisted; Reproducibility of Results; Sensitivity and Specificity; Time Factors; Tomography, X-Ray Computed;
Journal_Title :
Medical Imaging, IEEE Transactions on
DOI :
10.1109/TMI.2006.889743
