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Quantitative thyroid fluorescent scanning: technique and clinical experience.

J H Thrall, M T Gillen, M C Johnson

    AJR. American Journal of Roentgenology
    |March 1, 1978
    PubMed
    Summary
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    This study introduces a computer-free fluorescence scanning method to measure thyroid iodine content. The technique accurately quantifies iodine levels in various thyroid disorders, offering new insights into thyroid status.

    Area of Science:

    • Endocrinology
    • Medical Physics
    • Nuclear Medicine

    Background:

    • Thyroid iodine content is a crucial parameter for assessing thyroid function and disease.
    • Accurate quantification of thyroid iodine is essential for diagnosis and management.
    • Existing methods may be complex or require advanced computational resources.

    Purpose of the Study:

    • To describe and validate a modified fluorescence scanning system for quantifying thyroid gland iodine content.
    • To assess the feasibility of a computer-free method for in-vivo iodine measurement.
    • To evaluate thyroid iodine levels across various thyroid disorders.

    Main Methods:

    • Utilized a modified fluorescence scanning system with single channel analyzers and digital scalers.
    • Determined net counts from iodine k-alpha x-rays.

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  • Calibrated system response using thyroid phantoms with known iodine quantities.

    • Main Results:

    • Quantified thyroid iodine content in 250 patients with diverse thyroid conditions.
    • Established baseline iodine levels in euthyroid individuals (10.1 +/- 3.9 mg).
    • Reported distinct iodine levels for Graves' disease (24.4 +/- 9.9 mg), goiters (16.1 +/- 7.4 mg), hypothyroidism (0.5 mg), and multinodular goiter (7.3 +/- 4.1 mg).
    • Follow-up studies showed correlations between iodine levels, thyroid status, and treatment outcomes.

    Conclusions:

    • The fluorescence scanning technique provides a reliable method for quantifying thyroid iodine content without a computer.
    • The method offers valuable, previously unavailable information on thyroid iodine status.
    • Further clinical evaluation is needed to establish the full role of this technique in thyroid diagnostics.