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Absorbed Dose Determination in Photon and Electron Beams

An International Code of Practice

Second Edition

Also available in:

English STI/DOC/010/277 92-0-100597-0
26.00 1997


This second edition contains eight additional pages, summarizing recommended changes resulting from a review of data and procedures presented in the first edition. Otherwise, the report remains unchanged. The report itself represents a step towards a universal code advising users in Secondary Standard Dosimetry Laboratories (SSDLs) and radiation therapy centres throughout the world on how to obtain the absorbed dose from a measurement of exposure or another appropriate quantity. As the numerical result of a physical measurement must be complemented by an assessment of its uncertainty, Appendix A to this Code gives a brief summary of a treatment uncertainties concept by A. Allisy and J.W. Müller from the Bureau International des Poids et Mesures (BIPM).Contents: 1. Introduction; 2. Radiation quantities and units; 3. Equipment; 4. Radiation quality specification and determination; 5. Measurement chain; 6. Formalism; 7. Determination of absorbed dose to water; 8. Details on correction factors; 9. The uncertainty in absorbed dose determination at the reference point; 10. Evaluation of Performance; Appendix A: Evaluation of uncertainties; Appendix B: Introduction to worksheets and flow diagrams.

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