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Related Experiment Videos

Total body irradiation techniques and dosimetry.

A Dutreix, A Bridier

    Pathologie-Biologie
    |June 1, 1979
    PubMed
    Summary

    This study details total body irradiation (TBI) techniques using a 5.6 MV X-ray beam. In vivo dosimetry with semiconductor probes and thermoluminescent dosimeters ensured accurate dose delivery for cancer treatment.

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    Area of Science:

    • Medical Physics
    • Radiation Oncology

    Background:

    • Total body irradiation (TBI) is a critical component of certain cancer treatment regimens.
    • Accurate dosimetry is essential for effective TBI and minimizing side effects.

    Purpose of the Study:

    • To present the irradiation techniques and dosimetric methods for TBI at Institut Gustave Roussy.
    • To validate the accuracy of delivered doses using in vivo measurements.

    Main Methods:

    • TBI performed using a 5.6 MV X-ray beam from a Neptune linear accelerator.
    • Patients irradiated horizontally at a source-to-surface distance of 4.20 m.
    • In vivo dosimetry utilized Therados semiconductor probes for real-time monitoring and lithium fluoride thermoluminescent dosimeters for reference.

    Main Results:

    • A three-part TBI procedure delivered 8 Gy to the whole body, with lungs shielded to receive 4 Gy.
    • Mean nominal dose rate at the abdomen mid-plane was approximately 9 cGy/min.
    • In vivo measurements confirmed dose distribution and accuracy.

    Conclusions:

    • The described TBI techniques and in vivo dosimetry methods provide accurate and reliable dose delivery.
    • The approach ensures appropriate radiation doses to target tissues while protecting organs at risk like the lungs.

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