This proceedings presents a refereed selection of papers that were given at the symposium held in Vienna in November 2002. Emphasis was placed on dosimetry for therapeutic applications of radiation in medicine. However, some papers deal with dosimetry in diagnostic radiology and nuclear medicine. Although many dosimetry techniques are discussed, calorimetry is featured in one session exclusively. Many papers deal with dosimetry standards, protocols and comparisons. The need for accurate dosimetry for the treatment of cancer was a common thread throughout the symposium.