Survey of ultrasound therapy devices in Manitoba

In 1982 a survey was performed of 89 ultrasound therapy devices in use in medical and paramedical organizations in Manitoba. Field measurements of ultrasonic output power, intensity, and timer accuracy in the clinical operating range were made together with maximum output power and transducer operating frequency. Results of the measurements are presented and the performance characteristics of the units compared with manufacturers' performance criteria for ultrasound therapy devices as given in the Canadian Radiation Emitting Devices (RED) Act.