Ultrasonic processes and circuits for carrying out those processes

US5678553A · kind A · utility

Assignee

• SCHERING CORPORATION · US

Inventors

• Volkmar Uhlendorf · Berlin, DE
• Christian Hoffmann · Leonberg, DE
• Thomas Fritzsch · Berlin, DE

Key dates

• Filing date: Nov 1, 1994
• Grant date: Oct 21, 1997
• Expiry date: Nov 1, 2014

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S7/52038
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A process for selective graphic representation and/or evaluation of the Doppler spectrum of objects limitedly resistant to sonic intensity, for example biological organs and tissues, by an ultrasonic process wherein a material is introduced in the examination area to be acoustically irradiated, nonlinear oscillations are produced in the examination area by irradiated ultrasonic waves and the signal is evaluated by an ultrasonic converter. Also, a circuit for carrying out the above process is disclosed.