Medical ultrasound
A contrast medium for medical ultrasonography is a formulation of encapsulated gaseous microbubbles to increase echogenicity of blood, discovered by Dr Raymond Gramiak in 1968 and named contrast-enhanced ultrasound. This contrast medical imaging modality is clinically used throughout the world, in particular for echocardiography in the United States and for ultrasound radiology in Europe and Asia.
Ultrasonic toothbrush
The first ultrasonic toothbrush, initially branded Ultima and later Ultrasonex by Sonex Corporation, was first patented in the USA in 1992 by Robert T. Bock, the same year the FDA gave it approval for daily home use. Initially, the Ultima worked only on ultrasound. A few years later, a motor was added to the Ultrasonex brush, which provided additional sonic vibration. Sonex was then sold to Salton, Inc., who began distributing the product in the USA and many other countries. In 2008, Salton Corporation’s new owners decide to exit the oral hygiene market and since then, several new companies started selling ultrasonic toothbrushes such as the Ultreo, Megasonex, and Emmi-Dent brands. In addition, in late 2012, Robert T. Bock created a new Ultrasonic toothbrush, the Smilex Ultrasonic Toothbrush using updated technology. Today, most ultrasonic toothbrushes simultaneously work in the ultrasonic mode together with sonic vibration. , the only Ultrasonic toothbrushes being marketed are the brands Emmi-Dent, Megasonex and Smilex.