Contrast agents comprising gas-containing or gas-generating polymer microparticles or microballoons

US5676925A · kind A · utility

Assignee

• NYCOMED IMAGING AS · NO

Inventors

• Jo Klaveness · Oslo, NO
• Pal Rongved · Oslo, NO
• Jan Solberg · Oslo, NO
• Per Strande · Oslo, NO
• Unni Nordby Wiggen · Rasta, NO
• Keith Redford · Hagan, NO

Key dates

• Filing date: Jun 7, 1995
• Grant date: Oct 14, 1997
• Expiry date: Jun 7, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T436/24
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Contrast agents comprising gas-containing or gas-generating polymer microparticles and/or microballoons, in which the polymer is a biodegradable polymer containing units of formula EQU --(O).sub.m --CO--O--C(R.sup.1 R.sup.2)--O--CO--(O).sub.n -- (wherein R.sup.1 and R.sup.2 each represent hydrogen or a carbon-attached monovalent organic group or together form a carbon-attached divalent organic group, and m and n are each independently zero or one) may be used in diagnostic applications such as ultrasound and MR imaging.