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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Jian Fu Baihong Jiang Bin Li Peng Li Qianli Wang |
| Copyright Year | 1963 |
| Abstract | X-ray cone-beam computed tomography (CBCT) imaging based on the single circular orbit scan mode has become more and more popular because of its high imaging speed. Generally the X-ray source and detectors are stationary and the scanned object rotates step by step over 360° in this kind of system. In order to improve the imaging efficiency, the step rotation is sometimes replaced by the continuous rotation. For this continuous rotation, if there is an error about the number of projection images over 360° caused by the uncertainty of synchronization between the detector and the mechanical sub-system, the angular increment for the CT reconstruction may not be known exactly. The error will lead to serious artifacts in the CT images. This paper describes two possible methods determining the angular increment. Both of them are based on the statistical similarity among the projection images. They determined the angular increment by calculating the correlation coefficients and the standard deviation of the difference image between the image at 0° and the images at other angular positions. These two methods can verify each other. We performed numerical studies and experiments to demonstrate and validate the proposed approaches. Results in these studies and experiments confirm that the proposed two methods can determine the right projection number and the angular increment. The proposed approaches may find applications in CBCT system with continuous single circular orbit scan mode. |
| Sponsorship | IEEE Nuclear and Plasma Sciences Society Computer Applications in Nuclear and Plasma Sciences (CANPS) Lawrence Berkeley Lab. Lawrence Livermore Nat. Lab. APS College of William and Mary Continuous Electron Beam Accelerator Facility NASA Defence Nuclear Agency Sandia National Laboratories Jet Propulsion Laboratory Brookhaven Nat. Lab. Lawrence Livermore Nat. Lab IEEE/NPPS Radiat. Effects Committee Defence Nuclear Agency/DoD Sandia National Laboratories/DOE Jet Propulsion Laboratory/NASA Phillips Lab./DoD |
| Starting Page | 1071 |
| Ending Page | 1076 |
| Page Count | 6 |
| File Size | 1293176 |
| File Format | |
| ISSN | 00189499 |
| Volume Number | 57 |
| Issue Number | 3 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2010-06-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Computed tomography Optical imaging X-ray imaging Image reconstruction X-ray detection X-ray detectors Object detection Biomedical imaging Uncertainty Visualization image reconstruction continuous scan flat panel detector |
| Content Type | Text |
| Resource Type | Article |
| Subject | Nuclear and High Energy Physics Electrical and Electronic Engineering Nuclear Energy and Engineering |
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