申请人:Nycomed Imaging AS
公开号:US05795562A1
公开(公告)日:1998-08-18
The present invention relates to 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 -\x9b--(O).sub.m --CO--O--C(R.sup.1 R.sup.2)--O--CO--(O).sub.n --!- . 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. The contrast agents may be used in diagnostic applications such as ultrasound and MR imaging.
本发明涉及对比剂,其包括含气或产生气体的聚合物微粒和/或微气球,其中聚合物是含有式单元的可生物降解聚合物-\x9b--(O).sub.m --CO--O--C(R.sup.1 R.sup.2)--O--CO--(O).sub.n --!-。R.sup.1和R.sup.2分别表示氢或碳连接的一价有机基团,或共同形成碳连接的二价有机基团,m和n各自独立地为零或一。该对比剂可用于诊断应用,如超声和磁共振成像。