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Filtered Backprojection Reconstruction with Depth-Dependent Filtering |
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| Authors: | FrankDennerlein HolgerKunze Fr%c%ad%c%aricNooSiemensAG HealthcareSector Forchheim Germany UCAIR |
| Institution: | Frank+Dennerlein,Holger+Kunze,Fr%c3%a9d%c3%a9ric+Noo+Siemens+AG,Healthcare+Sector,Forchheim+91301,Germany,UCAIR,Department+of+Radiology,University+of+Utah,Salt+Lake+City,UT+84108,USA |
| Abstract: | A direct filtered-backprojection(FBP) reconstruction algorithm is presented for circular cone-beam computed tomography(CB-CT) that allows the filter operation to be applied efficiently with shift-variant band-pass characteristics on the kernel function.Our algorithm is derived from the ramp-filter based FBP method of Feldkamp et al.and obtained by decomposing the ramp filtering into a convolution involving the Hilbert kernel(global operation) and a subsequent differentiation operation(local operation).The d... |
| Keywords: | computed tomography(CT) reconstruction filtered backprojection circular cone-beam CT |
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