A Canada wide survey of the diagnostic, therapeutic, and surgical applications of ultrasound in medicine was conducted in the Fall of 1977. A total of 4154 questionnaires were sent to 1341 hospitals, 1887 chiropractors, 300 physiotherapists, and 726 sports medicine clinics. 62% of the questionnaires were returned, 40% of these completed. The comprehensive questionnaire provides information on the type of equipment used, the operator qualifications, the patient exposure, the number of patients treated, and adverse effects. Statistics of the results of the survey will be presented. The survey is believed to be the most detailed study undertaken to date of the use of ultrasound in medicine, and the results will be of interest to all ultrasound regulatory bodies and physicians working in the field.