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Related Experiment Videos

Fluoroscopy without the grid: a method of reducing the radiation dose

P Drury, A Robinson

    The British Journal of Radiology
    |February 1, 1980
    PubMed
    Summary

    Removing the anti-scatter grid during pediatric fluoroscopy and radiography significantly reduces patient radiation dose. Diagnostic image quality remains acceptable for many contrast examinations in children, balancing dose reduction with clinical needs.

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    Area of Science:

    • Medical Imaging
    • Radiology
    • Pediatric Imaging

    Background:

    • Anti-scatter grids are standard in fluoroscopy to improve image contrast.
    • Routine use of anti-scatter grids increases patient radiation dose.
    • Pediatric radiology departments perform numerous contrast examinations.

    Purpose of the Study:

    • To evaluate the impact of removing the anti-scatter grid on radiation dose and diagnostic image quality in pediatric fluoroscopy.
    • To assess the diagnostic acceptability of reduced contrast in pediatric contrast examinations.
    • To measure the contrast improvement factor of anti-scatter grids.

    Main Methods:

    • Conducted over 80 contrast examinations with the anti-scatter grid removed.
    • Assessed image quality and diagnostic acceptability qualitatively.

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  • Measured the contrast improvement factor using tissue-equivalent phantoms of varying thicknesses.

    • Main Results:

    • Removing the anti-scatter grid approximately halved patient radiation dose during fluoroscopy and radiography.
    • Diagnostic contrast loss was acceptable for many pediatric contrast examinations.
    • Anti-scatter grids significantly improve contrast, but clinical relevance varies with imaging goals.

    Conclusions:

    • The anti-scatter grid can be removed for many pediatric contrast examinations to reduce radiation dose without compromising diagnostic quality.
    • Radiologists should use discretion regarding anti-scatter grid use in pediatric fluoroscopy.
    • Fluoroscopic equipment should allow for easy grid removal and reintroduction.