Ultrasonic processes and circuits for performing them

US5410516A · kind A · utility

Assignee

• SCHERING CORPORATION · US

Inventors

• Volkmar Uhlendorf · Berlin, DE
• Thomas Fritzsch · Berlin, DE
• Joachim Siegert · Berlin, DE

Key dates

• Filing date: Jun 14, 1993
• Grant date: Apr 25, 1995
• Expiry date: Jun 14, 2013

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S15/8979
• 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.