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[Quality assurance of Doppler sonographic procedures].

For new diagnostic procedures, such as Doppler sonography, measures for quality assessment are of particular importance. Certificates are required by the professional authorities attesting adequate training and practical experience. In addition, minimum technical requirements for the equipment are laid down. The scientific associations may give advice in the preparation of training programme. They can also propose suitable trainers and training centres. For the doctor, Doppler sonography is only one link in the chain of the diagnostic procedures for vascular disease. It should only be employed when the investigation is clearly directed and if the user is familiar with the methods concerned. The decision to undertake further diagnostic examinations, which frequently involve risks, and the therapeutic consequences demand clinical experience and the cooperation of the individual clinical disciplines involved.