The recognition and application of irradiation as a sanitary and phytosanitary treatment of food is becoming increasingly important. This report highlights the importance of proper dosimetry systems to ensure the compliance of trade in irradiated food with national and international standards. It provides the most recent data and information on radiation dosimetry as applied to food irradiation. Contents: 1. General aspects of food irradiation; 2. Fundamentals of dosimetry; 3. Irradiator design concepts; 4. Process validation; 5. Facility operation and process control; 6. Dosimetry systems; Appendix I: Dosimetry procedures: Fricke and PMMA; Appendix II: Calibration of spectrophotometers; Annex I: Practical irradiator designs; Annex II: Dosimetry requirements and applications: A checklist.