This publication is supplementary to Technical Report Series No. 457: Dosimetry in Diagnostic Radiology: An International Code of Practice. It details the application of the code of practice, both in the area of standards laboratories and in clinical medical physics. New material in the areas of kerma area product (KAP) meter calibration and discussions on beam qualities appropriate for KAP meter and mammography measurements are presented. The results of diagnostic dosimetry implementation tests, along with recommendations for use of the code of practice, are discussed, including examples of computed tomography dose calculations and of the estimation of uncertainty.