摘要:
A method of crosslinking a crosslinkable protein or carbohydrate substrate to form a crosslinked substrate in which the crosslinking groups are biodegradable. The crosslinking groups may comprise methylene diacrylate and the substrate can be galactose.
摘要:
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.
摘要:
The invention relates to certain substituted derivatives of aminopolycarboxylic acids and metal chelates thereof. The compounds are particularly suitable for use as diagnostic agent. For example, the compounds can be used as radiodiagnostic agents, detoxification agents and contrast agents for diagnostic imaging processes. In particular, the high relaxivity paramagnetic metal chelates of substituted aminopolycarboxylic acids are especially suited for use as magnetic resonance imaging contrast agents.
摘要:
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 -�--(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.
摘要:
This invention relates to ultrasound contrast agents in the form of microparticles comprising a biotolerable matrix (e.g. of a carbohydrate or an X-ray contrast agent) in association with a gas or a precursor therefor. The contrast agents are stabilized to enhance their in vivo stability and/or echogenicity by covalently modifying the structure of the matrix, e.g. to introduce crosslinking groups or to attach lipophilic groups and/or molecules. The covalent moieties may include biodegradable linkages to assist rapid subsequent elimination of the contrast agents from the system.
摘要:
This invention relates to ultrasound contrast agents in the form of microparticles comprising a biotolerable matrix (e.g. of a carbohydrate or an X-ray contrast agent) in association with a gas or a precursor therefor. The contrast agents are stabilized to enhance their in vivo stability and/or echogenicity by covalently modifying the structure of the matrix, e.g. to introduce crosslinking groups or to attach lipophilic groups and/or molecules. The covalent moieties may include biodegradable linkages to assist rapid subsequent elimination of the contrast agents from the system.
摘要:
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.
摘要:
Heterocyclic chelating agents and salts thereof of formula I: ##STR1## wherein X represents a bond, O or S, or a group CHR.sup.1 or NR.sup.3 ; each R.sup.1 represents H, a group OR.sup.3 or NR.sup.3 R.sup.3, or an alkyl or alkoxyalkyl group optionally substituted by a hydroxyl group or by a group NR.sup.3 R.sup.3 or CON.sup.3 R.sup.3 ;each R.sup.2 represents H, or an alkyl or alkoxy group optionally substituted by a hydroxyl or alkoxy group;each R.sup.3 represents H, an optionally hydroxylated alkyl group or a group CH.sub.2 Y;Y represents a group COZ, CON(OH)R.sup.4, POZ.sub.2 or SO.sub.2 Z,Z represents a group OR.sup.4, NR.sup.4 R.sup.4 or ##STR2## where each R.sup.11 is H, a hydroxyl group or an optionally hydroxylated alkyl group, s is 0, 1 or 2, and W is CHR.sup.11, NR.sup.11 or an oxygen atom; andeach R.sup.4 represents H, or an optionally mono- or poly-hydroxylated alkyl, alkoxyalkyl or polyalkoxyalkyl group;with the provisos that where s is 0 then W is CHR.sup.11 and that where X represents a bond or CHR.sup.1, at least one group R.sup.1 or R.sup.2 represents other than H or an unsubstituted alkyl group, A process for preparing these agents and methods of heavy metal detoxification using these agents are also described.
摘要翻译:式I的杂环螯合剂及其盐:其中X表示键,O或S,或CHR1或NR3基团; 每个R 1表示H,OR 3或NR 3 R 3基团或任选被羟基或NR 3 R 3或CON 3 R 3基团取代的烷基或烷氧基烷基; 每个R 2表示H或任选被羟基或烷氧基取代的烷基或烷氧基; 每个R 3表示H,任选羟基化的烷基或基团CH 2 Y; Y表示基团COZ,CON(OH)R4,POZ2或SO2Z,Z表示OR4,NR4R4或,其中每个R11为H,羟基或任选羟基化烷基,s为0,1或2 W是CHR 11,NR 11或氧原子; 并且每个R 4表示H或任选的单羟基化或多羟基化烷基,烷氧基烷基或聚烷氧基烷基; 条件是其中s为0,则W为CHR 11,并且其中X表示键或CHR,至少一个R 1或R 2基团不是H或未取代的烷基。A制备这些试剂的方法和重金属的方法 还描述了使用这些试剂的解毒。
摘要:
The present invention relates to contrast agents comprising microbubble-generating carbohydrate microparticles in admixture with an amphiphilic organic acid containing in excess of 20 carbon atoms. The contrast agents exhibit good stability and/or enhanced contrast effect and may be used in diagnostic applications such as ultrasound and MR imaging.
摘要:
There is provided a contrast medium composition comprising: (a) a first contrast agent comprising a physiologically tolerable manganese compound together with an uptake promoter, having a manganese concentration of at least 0.3 mM or being in a dosage unit form containing at least 300 .mu.mol manganese, wherein the uptake promoter comprises a physiologically tolerable reducing compound containing an .alpha.-hydroxy ketone group or a physiologically tolerable acid containing .alpha.- and/or .beta.- hydroxy or amino groups, or a salt thereof, and/or vitamin D; together with (b) a second contrast agent.Such compositions are particularly suitable for imaging of the liver.