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Radionuclide study in pulmonary sequestration.

K Kawakami, S Tada, N Katsuyama

    Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine
    |March 1, 1978
    PubMed
    Summary
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    Radionuclide imaging revealed abnormal blood supply in pulmonary sequestration. A delay in radioactive tracer arrival in the affected lung confirmed systemic arterial supply, differentiating it from typical pulmonary artery flow.

    Area of Science:

    • Medical Imaging
    • Nuclear Medicine
    • Cardiovascular Physiology

    Background:

    • Pulmonary sequestration is a rare congenital lung malformation.
    • Diagnosing the source of blood supply is crucial for treatment planning.
    • Aberrant systemic arterial supply is a key characteristic.

    Observation:

    • A patient with suspected left lower lobe sequestration underwent radionuclide hemodynamic study.
    • Two regions of interest were placed over the lower lung fields.
    • Technetium-99m (Tc-99m) albumin was injected intravenously.

    Findings:

    • Radioactivity appeared in the left lung region 8-10 seconds later than the right.
    • This delay indicated a slower transit time to the sequestration.
    • The findings supported an aberrant systemic arterial supply to the sequestered lung segment.

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    Implications:

    • Radionuclide imaging effectively demonstrates aberrant systemic arterial supply in pulmonary sequestration.
    • This technique aids in differentiating sequestration from other lung pathologies.
    • Accurate diagnosis facilitates appropriate surgical or interventional management.