Distance-driven projection and backprojection in three dimensions
Projection and backprojection are operations that arise frequently in tomographic imaging. Recently, we proposed a new method for projection and backprojection, which we call distance-driven, and that offers low arithmetic cost and a highly sequential memory access pattern. Furthermore, distance-dri...
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| Veröffentlicht in: | Physics in medicine & biology 2004-06, Vol.49 (11), p.2463-2475 |
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| container_title | Physics in medicine & biology |
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| creator | Man, Bruno De Basu, Samit |
| description | Projection and backprojection are operations that arise frequently in tomographic imaging. Recently, we proposed a new method for projection and backprojection, which we call distance-driven, and that offers low arithmetic cost and a highly sequential memory access pattern. Furthermore, distance-driven projection and backprojection avoid several artefact-inducing approximations characteristic of some other methods. We have previously demonstrated the application of this method to parallel and fan beam geometries. In this paper, we extend the distance-driven framework to three dimensions and demonstrate its application to cone beam reconstruction. We also present experimental results to demonstrate the computational performance, the artefact characteristics and the noise-resolution characteristics of the distance-driven method in three dimensions. |
| doi_str_mv | 10.1088/0031-9155/49/11/024 |
| format | Article |
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| subjects | Algorithms Imaging, Three-Dimensional - methods Information Storage and Retrieval - methods Numerical Analysis, Computer-Assisted Phantoms, Imaging Radiographic Image Enhancement - methods Radiographic Image Interpretation, Computer-Assisted - methods Reproducibility of Results Scattering, Radiation Sensitivity and Specificity Signal Processing, Computer-Assisted Tomography, X-Ray Computed - instrumentation Tomography, X-Ray Computed - methods |
| title | Distance-driven projection and backprojection in three dimensions |
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