Download PDF
Nuklearmedizin 1985; 24(04): 164-168
DOI: 10.1055/s-0038-1624297
Originalarbeiten - Original Articles
Schattauer GmbH

Application of Combined Median- Averaging Filters to Scintigraphic Image Processing

Anwendung eines kombinierten Median-Mittelwert-Filters zur Bearbeitung szintigraphischer Bilder
W. Grochulski
1   From the Medical Physics Laboratory, Institute of Experimental Physics, University of Warsaw, Poland
,
P. Mitraszewski
1   From the Medical Physics Laboratory, Institute of Experimental Physics, University of Warsaw, Poland
,
P. Penczek
1   From the Medical Physics Laboratory, Institute of Experimental Physics, University of Warsaw, Poland
› Author Affiliations
Further Information

Publication History

Received: 15 January 1985

in revised form: 14 June 1985

Publication Date:
03 February 2018 (online)

    Permissions and Reprints

Summary

Statistical and deterministic properties of median filters are briefly discussed and their inherent advantages as a prospective tool in scintigraphic data processing are pointed out. The ability of median filters of suppressing impulse noise while the edge-like features of an image are preserved, is demonstrated on phantom data. The residual high-frequency noise remaining after median filtering can be subsequently reduced by standard smoothing procedures. A simple algorithm, made up of the superposition of a median and an averaging filter, is presented and shown to be a promising candidate in the quest for fast and easy-to-implement processing routine.

Zusammenfassung

Statistische und anwendungsbezogene Eigenschaften von Medianfiltern werden kurz diskutiert und ihre besonderen Vorteile als prospektives Werkzeug bei der szintigraphischen Datenverarbeitung herausgestellt. Die Fähigkeit von Medianfiltern, das Impulsrauschen zu unterdrücken, während kantenähnliche Merkmale eines Bildes erhalten bleiben, wird am Phantom demonstriert. Das restliche hochfrequente Rauschen, das nach der An- wendung des Medianfilters übrigbleibt, kann anschließend durch ein Standardglättungsverfahren reduziert werden. Ein einfacher Algorithmus, abgeleitet aus der Überlagerung eines Median- und eines Mittelwertfilters, wird vorgestellt und als vielversprechender Anwärter auf der Suche nach einem schnell und einfach anzuwendenden Computerprogramm herausgestellt.

 

  • REFERENCES

  • 1 Aho A. V., Hopcroft J, Ullman J. D.. The Design and Analysis of Computer Algorithms. Addison-Wesley, Reading, Mass. 1976
    PubMedGoogle Scholar
  • 2 Capellini V, Constantinides A. G., Emiliani P. Digital Filters and their Applications. Academic Press; London: 1978
    Google Scholar
  • 3 “Coordinated Research Programme on the Intercomparison of Computer-Assisted Scintigraphic Techniques”, 2nd and 3rd Progress Reports. In: Proc. Symp. Med. Radioisotope Imaging, Vol. I, 571-611. IAEA, Vienna 1977
    PubMedGoogle Scholar
  • 4 Grochulski W, Penczek P. Application of fast digital filters for the processing of scintigraphic pictures. Postçpy Fiz. Med 1982; 17: 1-14.
    Google Scholar
  • 5 Gwiazdowska B. A., Skrzypczak E. T., Tohvinski J. R.. The evaluation of noise reduction and resolution degradation in scintigraphic images due to the smoothing procedure. Nucl. Med 1982; 21: 126-9.
    Google Scholar
  • 6 Huang T. S., Yang G. J., Tang G. Y.. A Fast Two-Dimensional Median Filtering Algorithm. IEEE Trans. ASSP 1979; 27: 13-8.
    CrossrefGoogle Scholar
  • 7 Justusson B. J.. Median filtering, statistical properties. In: Two-Dimensional Digital Signal Processing,. Huang T. S.. ed.), Vol. II, 161-96. Springer; Berlin: 1981
    Google Scholar
  • 8 Todd-Pokropek A. E.. Imaging processing in nuclear medicine: An examination of the quest for a measure of clinical quality. In: Medical Images, Formation, Perception and Measurement. 7th L. H. Gray Conference, 278-92. John Wiley; London: 1973
    Google Scholar
  • 9 Todd-Pokropek A. E.. Quality control, detection and display. In: Principles of Radionuclide Emission Imaging. 22-76. Pergamon Press; Oxford: 1982
    Google Scholar
  • 10 Tukey J. W.. Exploratory Data Analysis. Addison-Wesley, Reading, Mass. 1971
    PubMedGoogle Scholar
  • 11 Tyan S. G.. Median filtering, deterministic properties. In: Two-Dimensional Digital Signal Processing. Huang T. S.. ed.), Vol.11, 197-217. Springer; Berlin: 1981
    Google Scholar