PROCESS FOR THE PRODUCTION OF POLYMERIC MICROPARTICLES, MICROPARTICLES THAT ARE PRODUCED ACCORDING TO THIS PROCESS AS WELL AS THEIR USE IN MEDICAL DIAGNOSIS

摘要

The invention concerns a process for producing gas-containing microparticles for use in ultrasound diagnostics and with wall material formed from polyesters of .alpha.-, .beta.-, or .gamma.-hydroxycarboxylic acids. The invention also concerns particles produced using the process in question and the use of such particles in medical diagnostics.