Mart Algorithms for Circular and Helical Cone-Beam Tomography |
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| Authors: | Nitin Jain Anant Raj M. S. Kalra Prabhat Munshi V. R. Ravindran |
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| Affiliation: | 1. Nuclear Engineering and Technology Program, Indian Institute of Technology of Kanpur , Kanpur, India nitinsinghai.jain@gmail.com;3. Nuclear Engineering and Technology Program, Indian Institute of Technology of Kanpur , Kanpur, India;4. Vikram Sarabhai Space Center, Indian Space Research Organization (ISRO) , Thiruvananthapuram, India |
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| Abstract: | The present work is concerned with the evaluation of the performance and the efficient implementation of multiplicative algebraic reconstruction technique (MART) to reconstruct three-dimensional (3D) objects for two different source/detector trajectories. Three types of MART algorithms are tested on a numerical phantom (Defrise), and they are implemented on a 3D X-ray system of Vikram Sarabhai Space Centre (VSSC). Circular and helical cone-beam trajectories are used. The results are compared with convolution backprojection (CBP) algorithm for each trajectory. It is found that iterative algorithms perform better than their counterpart, the transform-based CBP algorithm, whenever tomography systems are ill-conditioned due to limited views and/or noisy projection data. |
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| Keywords: | algebraic reconstruction techniques cone-beam reconstruction convolution backprojection |
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