SynopsisMost radiology departments have had comprehensive quality assurance programmes up and running for many years. There are several tangible measures of the output of a radiological department in the form of workload, staffing, film quality, film retrieval, accuracy of reports, availability of reports, etc. There are also many less tangible aspects. In this paper, which attempts to cover most of the practical aspects of quality assurance in radiology, the programme is followed through from the initiation of the request for a radiological investigation right up to its possible influence on the outcome of the patient. The educational aspects are also addressed in this rapidly evolving field.