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Related Experiment Videos

Tissue doses in the upper gastrointestinal fluoroscopy examination.

O H Suleiman1, J Anderson, B Jones

  • 1Office of Training and Assistance, Food and Drug Administration, Rockville, Md. 20857.

Radiology
|March 1, 1991
PubMed
Summary

A new method estimates radiation tissue doses from upper gastrointestinal fluoroscopy. This approach quantizes fluoroscopy into discrete X-ray fields, enabling accurate dose calculation for organs like the thyroid and lungs.

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Area of Science:

  • Medical Physics
  • Radiology
  • Radiation Dosimetry

Background:

  • Upper gastrointestinal fluoroscopy is a common diagnostic imaging procedure.
  • Accurate estimation of radiation dose to specific tissues during fluoroscopy is crucial for patient safety.
  • Existing methods may not fully capture the complexities of dynamic fluoroscopic examinations.

Purpose of the Study:

  • To develop and validate a method for estimating tissue radiation doses during upper gastrointestinal fluoroscopy.
  • To quantify radiation exposure to organs such as the thyroid, uterus, lungs, and active bone marrow.

Main Methods:

  • Developed a method to estimate tissue doses from upper gastrointestinal fluoroscopy examinations.
  • Measured technical parameters of the clinical examination.

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  • Partitioned the dynamic examination into discrete X-ray fields and generated corresponding tissue dose tables using a computer program.

    • Main Results:

    • Fluoroscopy times in a sample of eight patients ranged from 108 to 183 seconds.
    • Radiation exposures ranged from 2.3 to 7.2 mC/kg (9.1-28 R).
    • Specific organ doses were quantified: thyroid (0.15-3.5 mGy), uterus (0.16-1.0 mGy), lungs (0.90-4.2 mGy), and active bone marrow (0.81-5.4 mGy).

    Conclusions:

    • The developed method enables the calculation of tissue doses for entire dynamic fluoroscopy examinations.
    • This approach provides valuable data for assessing radiation risks associated with upper GI fluoroscopy.
    • Further studies with larger patient cohorts are warranted to confirm these findings.