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Portrait of Anders Tingberg. Photo

Anders Tingberg

Associate professor

Portrait of Anders Tingberg. Photo

A software tool for increased efficiency in observer performance studies in radiology

Author

  • S Borjesson
  • M Hakansson
  • M Bath
  • S Kheddache
  • S Svensson
  • Anders Tingberg
  • Anna Grahn
  • Mark Ruschin
  • Bengt Hemdal
  • Sören Mattsson
  • LG Mansson
Show all

Summary, in English

Observer performance studies are time-consurning tasks, both for the participating observers and for the scientists collecting and analysing the data. A possible way to optimise such studies is to perform them in a completely digital environment. A software tool-ViewDEX (Viewer for Digital Evaluation of X-ray images)-has been developed in Java, enabling it to function on almost any computer. ViewDEX is designed to handle several types of studies, such as visual grading analysis (VGA), image criteria scoring (ICS) and receiver operating characteristics (ROC). The results from each observer are saved in a log file, which can be exported for further analysis in, for example, a special software for analysing ROC results. By using ViewDEX for an ROC experiment, an evaluation rate of similar to 200 images per hour can be achieved, compared to similar to 25 images per hour using hard copy evaluation. The results are obtained within minutes of completion of the viewing. The risk of human errors in the process of data collection and analysis is also minimised. The viewer has been used in a major trial containing similar to 2700 images.

Department/s

  • Medical Radiation Physics, Malmö

Publishing year

2005

Language

English

Pages

45-52

Publication/Series

Radiation Protection Dosimetry

Volume

114

Issue

1-3

Document type

Journal article

Publisher

Oxford University Press

Topic

  • Radiology, Nuclear Medicine and Medical Imaging

Status

Published

Research group

  • Medical Radiation Physics, Malmö

ISBN/ISSN/Other

  • ISSN: 1742-3406