Acta Stereologica

0351-580X

 

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Ingeborg Grell-Büchtmann, Wolfgang Hoffmann, Tina Dannheim, Anna Heimers, Astrid Nahrmann, Heike Schröder, Inge Schmitz-Feuerhake & Paul Tomalik

METAFER2: improved applicability and extended sensitivity of biological dosimetry by means of quantitative image analysis

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Abstract

The sensitivity of dose estimation after exposure to ionizing radiation by means of analysis of specific chromosomal aberrations (biological dosimetry) depends statistically on the number of metaphase plates analysed. For low-dose ranges about 1000-2000 cells are necessary. Thus this high extent of time needed is the main limiting factor. By use of an automated computer supported metaphase screening and a documentation of the coordinates the time of analysis can be reduced.

METAFER2 (Fa. Metasystems, Ladenburg, FRG) consists of a light microscope with a video camera and a AT-computer including a VGA-card.

The video images are analysed using a special software. The coordinates of all registrated metaphases can then be relocated and the metaphases be analysed interactively. Further documentation and statistical analysis of the data is supported.

As METAFER 2 reduces the time needed by 50 %, the number of cases may be doubled or in terms of sensitivity, the detection limit can be lowered.

Advantages and limitations of the system are discussed using results of biological dosimetry of four individuals. Two of them were radiated occupationally, the other two live in a region with high natural radioactivity.

Keywords : biological dosimetry, chromosome aberrations, digital image analysis, ionizing radiation, METAFER2

Pour citer cet article

Ingeborg Grell-Büchtmann, Wolfgang Hoffmann, Tina Dannheim, Anna Heimers, Astrid Nahrmann, Heike Schröder, Inge Schmitz-Feuerhake & Paul Tomalik, «METAFER2: improved applicability and extended sensitivity of biological dosimetry by means of quantitative image analysis», Acta Stereologica [En ligne], Volume 9 (1990), Number 2 - Proceedings of the seventh workshop on quantitative image analysis - Freiburg 90 - Dec. 1990, 157-162 URL : https://popups.uliege.be:443/0351-580X/index.php?id=2831.

A propos de : Ingeborg Grell-Büchtmann

Department of Medical Physics, FB 1, University of Bremen, 2800 Bremen 33, Fed. Rep. of Germany

A propos de : Wolfgang Hoffmann

Department of Medical Physics, FB 1, University of Bremen, 2800 Bremen 33, Fed. Rep. of Germany

A propos de : Tina Dannheim

Department of Medical Physics, FB 1, University of Bremen, 2800 Bremen 33, Fed. Rep. of Germany

A propos de : Anna Heimers

Department of Medical Physics, FB 1, University of Bremen, 2800 Bremen 33, Fed. Rep. of Germany

A propos de : Astrid Nahrmann

Department of Medical Physics, FB 1, University of Bremen, 2800 Bremen 33, Fed. Rep. of Germany

A propos de : Heike Schröder

Department of Medical Physics, FB 1, University of Bremen, 2800 Bremen 33, Fed. Rep. of Germany

A propos de : Inge Schmitz-Feuerhake

Department of Medical Physics, FB 1, University of Bremen, 2800 Bremen 33, Fed. Rep. of Germany

A propos de : Paul Tomalik

Department of Medical Physics, FB 1, University of Bremen, 2800 Bremen 33, Fed. Rep. of Germany