Polymeric surfactant-encapsulated microbubbles and their use in
申请人:Nycomed Imaging AS
公开号:US05919434A1
公开(公告)日:1999-07-06
The present invention relates to polymer-based gas-containing contrast agents in which microbubbles of gas are encapsulated by non-polymerizable wall-forming block or graft copolymer surfactants. The polymer surfactants are preferably biodegradable and include block and graft copolymers containing linkages of formula (I): --(O).sub.m --CO--O--C(R.sup.1 R.sup.2)--O--CO--(O).sub.n --(I) where R.sup.1 and R.sup.2 each represent a hydrogen atom or a carbon-attached monovalent organic group, or R.sup.1 and R.sup.2 together form a carbon-attached divalent organic group and m and n are each zero or 1.
Contrast agents comprising gas-containing or gas-generating polymer
申请人:Nycomed Imaging AS
公开号:US05674468A1
公开(公告)日:1997-10-07
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 --(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.
Contrast agents comprising gas-containing or gas-generating
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.