Abstract: The invention relates to ultrasonic contrast agents comprising microparticles which comprise synthetic biodegradable polymer which is a polyalkylcyanoarylate and a gas and/or a fluid with a boiling point below 60.degree. C., processes for the preparation thereof and their use as diagnostic and therapeutic agents.
Type:
Grant
Filed:
June 7, 1995
Date of Patent:
June 6, 2000
Assignee:
Scharing Aktiengesellschaft
Inventors:
Michael Stein, Dieter Heldmann, Thomas Fritzsch, Joachim Siegert, Georg Roessling, Ulrich Speck