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The IAEA/WHO TLD postal programme for radiotherapy hospitals
1Dosimetry and Medical Radiation Physics Section, International Atomic Energy Agency, Vienna, Austria.
Summary
The International Atomic Energy Agency (IAEA) postal TLD audits improve radiotherapy beam calibration in developing nations. While progress is evident, dosimetry practices require further enhancement for global consistency.
Area of Science:
- Medical Physics
- Radiotherapy Dosimetry
- International Health Standards
Background:
- The International Atomic Energy Agency (IAEA) and World Health Organization (WHO) have conducted postal TLD audits since 1969.
- These audits verify radiotherapy beam calibration in developing countries.
Purpose of the Study:
- To report on recent improvements in the IAEA/WHO TLD program's efficiency.
- To assess the impact of these changes on radiotherapy dosimetry in developing countries.
Main Methods:
- Increased participant numbers and reduced turnaround time for TLD audit results.
- Implementation of a follow-up program for hospitals with results outside the +/- 5% acceptance limits.
- Transfer of IAEA TLD audit experience and methodology to national levels, including guidelines and technical support.
Main Results:
- Over 30 years, over 3300 clinical photon beams at ~1000 hospitals have been audited.
- Initial audit success rates are 65%, improving to over 80% for repeat audits.
- National TLD networks are being established with IAEA support.
Conclusions:
- Radiotherapy dosimetry in developing countries is gradually improving.
- Significant revisions are still needed to align dosimetry practices with international standards.
- Enhanced dosimetry is crucial for ensuring effective and safe modern radiotherapy.