Abstract

Computed tomography (CT) is one of the advanced means for non-destructive testing (NDT), which has the virtues of non-destructive, non-contact and high resolution. It is called the best means for NDT by the circle of international NDT. It has been widely applied in diagnostic medicine and industrial non-destructive testing. X-ray CT (XCT) is the most popular CT. Compared with other parts of CT system, reconstruction algorithm is an important part. In this paper, the theory of maximum likelihood estimation is applied to XCT, and ordered subsets expectation maximization (OS-EM) algorithm is studied and implemented. OS-EM algorithm is a feasible iterative method. It can provide good quality reconstructions after only a few iterations. Experiments results with real X-ray CT data show this method is effective. Reconstructed slice images of OS-EM algorithm are accurate and clear.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.