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Contrast-detail evaluation and dose assessment of eight digital chest radiography systems in clinical practice

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Abstract

The purpose of this study was to assess contrast-detail performance and effective dose of eight different digital chest radiography systems. Digital chest radiography systems from different manufacturers were included: one storage phosphor system, one selenium-coated drum system, and six direct readout systems including four thin-film transistor (TFT) systems and two charge-coupled device (CCD) systems. For measuring image quality, a contrast-detail test object was used in combination with a phantom that simulates the primary and scatter transmission through lung fields (LucAl). Six observers judged phantom images of each modality by soft-copy reading in a four-alternative-forced-choice experiment. The entrance dose was also measured, and the effective dose was calculated for an average patient. Contrast-detail curves were constructed from the observer data. The blocked two-way ANOVA test was used for statistical analysis. Significant difference in contrast-detail performance was found between the systems. Best contrast-detail performance was shown by a CCD system with slot-scan technology, and the selenium-coated drum system was compared to the other six systems (p values ≤0.003). Calculated effective dose varied between 0.010 mSv and 0.032 mSv. Significant differences in contrast-detail performance and effective dose levels were found between different digital chest radiography systems in clinical practice.

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Acknowledgements

The authors gratefully acknowledge the participation of the following persons in the panel of observers: J.P. van Delft, V. Schembri MSc, and D. Zweers BSc (Leiden University Medical Center, Department of Radiology).

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Authors and Affiliations

  1. Department of Radiology, C2S, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands

    Wouter J. H. Veldkamp, Lucia J. M. Kroft, Mireille V. Boot & Jacob Geleijns

  2. Department of Medical Statistics, C2S, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands

    Bart J. A. Mertens

  3. Department of Radiology, C2S, Leiden University Medical Center, PO Box 9600, 2300 RC, Leiden, The Netherlands

    Wouter J. H. Veldkamp

Authors
  1. Wouter J. H. Veldkamp
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  2. Lucia J. M. Kroft
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  3. Mireille V. Boot
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  4. Bart J. A. Mertens
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  5. Jacob Geleijns
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Correspondence to Wouter J. H. Veldkamp.

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Veldkamp, W.J.H., Kroft, L.J.M., Boot, M.V. et al. Contrast-detail evaluation and dose assessment of eight digital chest radiography systems in clinical practice. Eur Radiol 16, 333–341 (2006). https://doi.org/10.1007/s00330-005-2887-6

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  • DOI: https://doi.org/10.1007/s00330-005-2887-6

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