Skip to main content Accessibility help
×
Home

Preprocessing of Ion Microtomography Data for Improved Reconstruction Quality

  • David L. Weirup (a1), Arthur E. Pontau (a2), Arlyn J. Antolak (a2), Dan H. Morse (a2), G. Bench (a3), M. Cholewa (a3), A. Saint (a3) and G.J.F. Legge (a3)...

Abstract

In Ion Microtomography (IMT), material densities are determined from the energy lost by ions as they pass through a specimen. For fine-scale measurements with micron-size beams, mechanical stability and precision of motion can impact the quality of the reconstruction. We describe several preprocessing procedures used to minimize imperfect specimen manipulation, including adjustment of the center of mass motion in sinograms and correction for vertical translations. In addition, the amount of noise in the reconstruction is reduced by utilizing median (as opposed to mean) ion energy loss values for density determinations. Furthermore, particular portions of the sampled image can be enhanced with minimal degradation of spatial resolution by a judicial choice of spatial filter in the reconstruction algorithm. The benefits and limitations of these preprocessing techniques are discussed.

Copyright

References

Hide All
1. Pontau, A. E., Antolak, A. J., Morse, D. H., Berkmoes, A. A. Ver, Brase, J. M., Heikkinen, D. W., Martz, H. E. and Proctor, I. D., Nuc. Inst. Meth. B40.41 (1989) 646.
2. Pontau, A. E., Antolak, A. J., Morse, D. H., Nuc. Inst. Meth. B(1990) in press.
3. Ziegler, F., Handbook of Stooping Cross-sections for Energetic Ions in all Elements Pergamon Press, New York, 1980.
4. Azevedo, S. G., Schneberk, D. J., Fitch, J. P., Martz, H. E., LLNL Report UCRL-102615, IEEE Trans. Nuc. Sci., Vol.37, –4 (Aug. 1990), 15251540.
5. Overly, J. C., Schofield, R. M. S., MacDonald, J. D., and Lefevre, H. W., Nucl. Inst. Meth. B30 (1988) 337.
6. Proctor, I. D., Davis, J. C., Eaton, M. R., Garibaldi, J. I., Moore, T. L., Schumacher, B. J., Southon, J. R., and Zimmerman, T. A., Nucl. Inst. Meth. A268 (1988) 344.
7. Schneberk, D. J., Martz, H. E., Azevedo, S. G., Skeate, M., LLNL Report UCRL-101264, (1989), and The American Society for Nondestructive Testing Topical Conference on Industrial Computerized Tomograohy Topical Proceedings, July 25–27, Seattle, WA, Am.Soc.for NDT, Columbus OH (1989)609.

Related content

Powered by UNSILO

Preprocessing of Ion Microtomography Data for Improved Reconstruction Quality

  • David L. Weirup (a1), Arthur E. Pontau (a2), Arlyn J. Antolak (a2), Dan H. Morse (a2), G. Bench (a3), M. Cholewa (a3), A. Saint (a3) and G.J.F. Legge (a3)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.