Abstract
Great strides have been taken in the last few years in the development of both approximate and exact reconstruction I algorithms for helical cone-beam CT. The proposed algorithm uses so-called hybrid convolution which is a sum of ramp filtering and Hubert transform of projection data. We show that it satisfies the requirements of a modern practical CT reconstruction algorithm. In this work we evaluate the new method and compare it to several previously published algorithms. We evaluate spatial resolution and noise properties, and also the cone beam artifact. Evaluation demonstrated that the proposed algorithm outperforms the helical Feldkamp algorithm and another candidate in terms of image noise-to-resolution balance, as well as the cone beam artifact We also discuss implementation issues and propose a simplified version for over-scan reconstruction.
Original language | English (US) |
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Pages (from-to) | 3003-3007 |
Number of pages | 5 |
Journal | IEEE Nuclear Science Symposium Conference Record |
Volume | 5 |
State | Published - 2004 |
Externally published | Yes |
Event | 2004 Nuclear Science Symposium, Medical Imaging Conference, Symposium on Nuclear Power Systems and the 14th International Workshop on Room Temperature Semiconductor X- and Gamma- Ray Detectors - Rome, Italy Duration: Oct 16 2004 → Oct 22 2004 |
ASJC Scopus subject areas
- Radiation
- Nuclear and High Energy Physics
- Radiology Nuclear Medicine and imaging