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[Dosimetric studies using glass fibers]

S Gripp1, F W Häsing, H Büker

  • 1Klinik für Strahlentherapie der RWTH Aachen.

Strahlentherapie Und Onkologie : Organ Der Deutschen Rontgengesellschaft ... [Et Al]
|January 1, 1994
PubMed
Summary
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This study developed a lead-doped silica fiber optic dosimeter for real-time radiation measurement. The fiber shows linear dose response and is suitable for clinical applications, offering an alternative to traditional dosimeters.

Area of Science:

  • Materials Science: Development of novel optical fiber sensors.
  • Medical Physics: Application of dosimetry in clinical radiation therapy.

Context:

  • Ionizing radiation can cause glass discoloration, which is proportional to the absorbed radiation dose.
  • Accurate real-time dosimetry is crucial for effective radiation therapy and patient safety.

Purpose:

  • To develop a small-volume, real-time optical dosimeter using doped glass fiber for clinical applications.
  • To assess the feasibility of using radiation-induced optical loss in glass fibers for absorbed dose measurement.

Summary:

  • A lead-doped silica fiber dosimeter was investigated for its response to ionizing radiation.
  • The fiber exhibited a linear dose-response from 0 to 112 Gy with minimal energy dependence above 1 MeV.
  • Real-time measurements with high spatial resolution and low detection limits (0.04 Gy) were achieved.

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Impact:

  • This optical fiber dosimeter offers real-time, in-vivo dosimetry capabilities, surpassing limitations of traditional methods like thermoluminescence dosimeters (TLDs).
  • The technology has the potential to improve radiation therapy precision and patient outcomes by enabling immediate dose monitoring.