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Does digital imaging decrease patient dose? A pilot study and review of the literature.

V Neofotistou1, V Tsapaki, S Kottou

  • 1Medical Physics Department, Athens General Hospital, 11527 Athens, Greece. evaneof@otenet.gr

Radiation Protection Dosimetry
|February 9, 2006
PubMed
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Digital imaging offers potential dose reduction, but actual patient doses vary significantly between European centers. Further clinical trials are needed to establish digital imaging quality standards and dose reference levels.

Area of Science:

  • Radiological Sciences
  • Medical Imaging Technology
  • Radiation Dose Optimization

Background:

  • Digital imaging equipment cost is often justified by its potential to decrease patient radiation dose.
  • Existing literature presents conflicting results regarding actual patient dose reductions with digital imaging modalities.
  • Variability in digital imaging quality criteria and post-processing parameters complicates dose comparisons.

Purpose of the Study:

  • To measure patients' entrance surface doses for simple radiographic examinations using computed radiography (CR) digital systems in European centers.
  • To investigate the variability in patient doses across different European centers utilizing digital imaging.

Main Methods:

  • Entrance surface doses were measured for three common radiographic examinations (chest LAT, chest PA).

Related Experiment Videos

  • Measurements were conducted in European healthcare facilities equipped with computed radiography (CR) digital systems.

    • Main Results:

    • Significant dose variations were observed between centers, ranging from 30% for chest LAT to 250% for chest PA examinations.
    • Inconsistent digital image quality criteria and post-processing techniques contribute to difficulties in dose comparisons.

    Conclusions:

    • Direct dose comparisons between conventional and digital systems, or between different digital units, are challenging due to current variability.
    • Clinical trials are essential to define standardized digital image quality reference levels that meet clinical requirements.
    • Establishing these reference levels will facilitate accurate dose assessments and optimization in digital radiography.