Abstract
A new method is presented for automatic contour extraction in computerized tomography (CT) reconstruction, based on projection segmentation and backprojection. Contour extraction is of great importance in medical applications, especially in nondestructive inspection. Manual segmentation includes pixel selection, geometrical boundary selection, and tracing, however, it depends on the experience of the operators and is time-consuming. Most fully automatic segmentation methods for CT images are usually impractical due to the obvious noise in reconstructed slices. Because the backprojection algorithm is of a high-pass nature, the noise is always in high frequencies. The projections, however, are much clearer than the reconstructed slices. The advantage of the new algorithm is its simplicity in segmenting the projections instead of the slices. Simulation results illustrate the accuracy of this method. A circular trajectory cone-beam micro-CT system is used to validate the algorithm. The experiment result shows a perfect 3-D contour of a rat skull.
Sign-in/Register to access full text options 
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 callDisclaimer: 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.
