Extending Three-Dimensional Weighted Cone Beam Filtered Backprojection (CB-FBP) Algorithm for Image Reconstruction in Volumetric CT at Low Helical Pitches
A three-dimensional (3D) weighted helical cone beam filtered backprojection (CB-FBP) algorithm (namely, original 3D weighted helical CB-FBP algorithm) has already been proposed to reconstruct images from the projection data acquired along a helical trajectory in angular ranges up to [0,2π]. However,...
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| Format: | Article |
| Language: | English |
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Wiley
2006-01-01
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| Series: | International Journal of Biomedical Imaging |
| Online Access: | http://dx.doi.org/10.1155/IJBI/2006/45942 |
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| author | Xiangyang Tang Jiang Hsieh Roy A. Nilsen Scott M. McOlash |
| author_facet | Xiangyang Tang Jiang Hsieh Roy A. Nilsen Scott M. McOlash |
| author_sort | Xiangyang Tang |
| collection | DOAJ |
| description | A three-dimensional (3D) weighted helical cone beam filtered
backprojection (CB-FBP) algorithm (namely, original 3D weighted
helical CB-FBP algorithm) has already been proposed to reconstruct
images from the projection data acquired along a helical
trajectory in angular ranges up to [0,2π]. However, an
overscan is usually employed in the clinic to reconstruct
tomographic images with superior noise characteristics at the most
challenging anatomic structures, such as head and spine,
extremity imaging, and CT angiography as well. To obtain the most
achievable noise characteristics or dose efficiency in a helical
overscan, we extended the 3D weighted helical CB-FBP algorithm to
handle helical pitches that are smaller than 1:1 (namely
extended 3D weighted helical CB-FBP algorithm). By decomposing a
helical over scan with an angular range of [0,2π+Δβ] into a union of full scans corresponding to an angular
range of [0,2π], the extended 3D weighted function is a
summation of all 3D weighting functions corresponding to each full
scan. An experimental evaluation shows that the extended 3D
weighted helical CB-FBP algorithm can improve noise
characteristics or dose efficiency of the 3D weighted helical
CB-FBP algorithm at a helical pitch smaller than 1:1, while its
reconstruction accuracy and computational efficiency are
maintained. It is believed that, such an efficient CB
reconstruction algorithm that can provide superior noise
characteristics or dose efficiency at low helical pitches may find
its extensive applications in CT medical imaging. |
| format | Article |
| id | doaj-art-04a4658f0abe4a5da1f633e45cc070a2 |
| institution | OA Journals |
| issn | 1687-4188 1687-4196 |
| language | English |
| publishDate | 2006-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Biomedical Imaging |
| spelling | doaj-art-04a4658f0abe4a5da1f633e45cc070a22025-08-20T02:03:05ZengWileyInternational Journal of Biomedical Imaging1687-41881687-41962006-01-01200610.1155/IJBI/2006/4594245942Extending Three-Dimensional Weighted Cone Beam Filtered Backprojection (CB-FBP) Algorithm for Image Reconstruction in Volumetric CT at Low Helical PitchesXiangyang Tang0Jiang Hsieh1Roy A. Nilsen2Scott M. McOlash3GE Healthcare, 3000 North Grandview Boulevard, W-1190, Waukesha, WI 53188, USAGE Healthcare, 3000 North Grandview Boulevard, W-1190, Waukesha, WI 53188, USAGE Healthcare, 3000 North Grandview Boulevard, W-1190, Waukesha, WI 53188, USAGE Healthcare, 3000 North Grandview Boulevard, W-1190, Waukesha, WI 53188, USAA three-dimensional (3D) weighted helical cone beam filtered backprojection (CB-FBP) algorithm (namely, original 3D weighted helical CB-FBP algorithm) has already been proposed to reconstruct images from the projection data acquired along a helical trajectory in angular ranges up to [0,2π]. However, an overscan is usually employed in the clinic to reconstruct tomographic images with superior noise characteristics at the most challenging anatomic structures, such as head and spine, extremity imaging, and CT angiography as well. To obtain the most achievable noise characteristics or dose efficiency in a helical overscan, we extended the 3D weighted helical CB-FBP algorithm to handle helical pitches that are smaller than 1:1 (namely extended 3D weighted helical CB-FBP algorithm). By decomposing a helical over scan with an angular range of [0,2π+Δβ] into a union of full scans corresponding to an angular range of [0,2π], the extended 3D weighted function is a summation of all 3D weighting functions corresponding to each full scan. An experimental evaluation shows that the extended 3D weighted helical CB-FBP algorithm can improve noise characteristics or dose efficiency of the 3D weighted helical CB-FBP algorithm at a helical pitch smaller than 1:1, while its reconstruction accuracy and computational efficiency are maintained. It is believed that, such an efficient CB reconstruction algorithm that can provide superior noise characteristics or dose efficiency at low helical pitches may find its extensive applications in CT medical imaging.http://dx.doi.org/10.1155/IJBI/2006/45942 |
| spellingShingle | Xiangyang Tang Jiang Hsieh Roy A. Nilsen Scott M. McOlash Extending Three-Dimensional Weighted Cone Beam Filtered Backprojection (CB-FBP) Algorithm for Image Reconstruction in Volumetric CT at Low Helical Pitches International Journal of Biomedical Imaging |
| title | Extending Three-Dimensional Weighted Cone Beam Filtered Backprojection (CB-FBP) Algorithm for Image Reconstruction in Volumetric CT at Low Helical Pitches |
| title_full | Extending Three-Dimensional Weighted Cone Beam Filtered Backprojection (CB-FBP) Algorithm for Image Reconstruction in Volumetric CT at Low Helical Pitches |
| title_fullStr | Extending Three-Dimensional Weighted Cone Beam Filtered Backprojection (CB-FBP) Algorithm for Image Reconstruction in Volumetric CT at Low Helical Pitches |
| title_full_unstemmed | Extending Three-Dimensional Weighted Cone Beam Filtered Backprojection (CB-FBP) Algorithm for Image Reconstruction in Volumetric CT at Low Helical Pitches |
| title_short | Extending Three-Dimensional Weighted Cone Beam Filtered Backprojection (CB-FBP) Algorithm for Image Reconstruction in Volumetric CT at Low Helical Pitches |
| title_sort | extending three dimensional weighted cone beam filtered backprojection cb fbp algorithm for image reconstruction in volumetric ct at low helical pitches |
| url | http://dx.doi.org/10.1155/IJBI/2006/45942 |
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