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Related Experiment Videos

Abdominal regional hyperthermia with an annular phased array.

M D Sapozink, F A Gibbs, M J Egger

    Journal of Clinical Oncology : Official Journal of the American Society of Clinical Oncology
    |May 1, 1986
    PubMed
    Summary
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    This pilot study explored regional hyperthermia (HT) combined with radiotherapy for advanced abdominal cancers. While objective responses were limited, many patients experienced significant symptomatic palliation.

    Area of Science:

    • Oncology
    • Medical Physics
    • Clinical Research

    Background:

    • Advanced upper-abdominal malignancies present significant treatment challenges.
    • Integration of hyperthermia with radiotherapy is an evolving area in cancer therapy.
    • Pilot studies are crucial for evaluating novel treatment modalities.

    Purpose of the Study:

    • To assess the feasibility and toxicity of regional hyperthermia (HT) using the BSD-1000 system with an annular phased array (AA) applicator.
    • To evaluate the efficacy of HT combined with concurrent radiotherapy in patients with advanced upper-abdominal malignancy.
    • To analyze thermal dosimetry and patient outcomes, including response rates and survival.

    Main Methods:

    • Twenty-eight patients with advanced upper-abdominal malignancy were treated with regional hyperthermia (HT) and concurrent radiotherapy.

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  • Hyperthermia was delivered using the BSD-1000 HT system and an annular phased array (AA) applicator.
  • Thermal mapping, dosimetry, and toxicity assessments were performed; objective response and survival data were collected.

    • Main Results:

    • The treatment was generally tolerated, with acute toxicities including pain, systemic stress, and nausea/vomiting.
    • Systemic stress was the primary power-limiting factor for hyperthermia delivery.
    • The objective response rate was 18% (all partial responses), but 43% of patients achieved effective symptomatic palliation. Responders survived significantly longer.

    Conclusions:

    • Regional hyperthermia combined with low-dose radiotherapy can achieve symptomatic palliation in advanced abdominal cancers.
    • Toxicity, particularly systemic stress, requires careful management.
    • Further research is warranted to optimize HT parameters and patient selection for improved outcomes.