Title :
Deblurring subject to nonnegativity constraints when known functions are present with application to object-constrained computerized tomography
Author :
Snyder, Donald L. ; O´Sullivan, Joseph A. ; Whiting, Bruce R. ; Murphy, Ryan J. ; Benac, Jasenka ; Cataldo, J. Adam ; Politte, David G. ; Williamson, Jeffrey F.
Author_Institution :
Dept. of Electr. Eng., Washington Univ., St. Louis, MO, USA
Abstract :
The reconstruction of tomographic images is often treated as a linear deblurring problem. When a high-density, man-made metal object is present somewhere in the image field, it is a deblurring problem in which the unknown function has a component that is known except for some location and orientation parameters. The authors first address general linear deblurring problems in which a known function having unknown parameters is present. They then show how the resulting iterative solution can be applied to tomographic imaging in the presence of man-made foreign objects, and they apply the result, in particular, to X-ray computed tomography imaging used in support of brachytherapy treatment of advanced cervical cancer.
Keywords :
computerised tomography; image reconstruction; medical image processing; X-ray computed tomography imaging; advanced cervical cancer; brachytherapy treatment; deblurring; medical diagnostic imaging; nonnegativity constraints; object-constrained computerized tomography; tomographic images reconstruction; Application software; Books; Brachytherapy; Cervical cancer; Computed tomography; Deconvolution; Image reconstruction; Kernel; Optical imaging; X-ray imaging; Artifacts; Brachytherapy; Female; Humans; Image Processing, Computer-Assisted; Phantoms, Imaging; Tomography, X-Ray Computed; Uterine Cervical Neoplasms;
Journal_Title :
Medical Imaging, IEEE Transactions on