摘要:
The invention relates to a modification of electron spin resonance enhanced magnetic resonance imaging (ESREMRI) in which two magnetically responsive materials (contrast agents) are introduced into the sample being investigated, one contrast agent serving as an ESREMRI free induction decay signal enhancing agent and the other as enhancement suppressing agent. In this way, image contrast may be enhanced further for regions in which the suppressing agent distributes poorly or not at all or which the suppressing agent reaches at a later time than the enhancing agent.
摘要:
The present invention relates to a method of imaging of an animate human or non-human animal body, which method comprises: administering parenterally to said body a particulate material comprising a matrix or membrane material and at least one contrast generating species, which matrix or membrane material is responsive to a pre-selected physiological parameter whereby to alter the contrast efficacy of said species in response to a change in the value of said parameter; generating image data of at least part of said body in which said species is present; and generating therefrom a signal indicative of the value or variation of said parameter in said part of said body. The invention also relates to contrast media for imaging a physiological parameter.
摘要:
The present invention relates to devices and methods for melting a solid polarised sample while retaining a high level of polarisation. In an embodiment of the present invention a sample is polarised in a sample-retaining cup in a strong magnetic field in a polarising means in a cryostat and then melted inside the cryostat by melting means such as a laser connected by an optical fibre to the interior of the cryostat.
摘要:
The use in diagnostic imaging, in particular X-ray, MRI, ultrasound and scintigraphy, of contrast agents comprising bismuth clusters and/or organic bismuth compounds, and contrast media containing such bismuth compounds. The bismuth compounds are also useful in therapy, in particular as antimicrobial agents and antiulcer agents. Novel bismuth compounds are also disclosed.
摘要:
The invention provides low viscosity iodinated aryl compounds, useful as X-ray contrast agents, of formula I ##STR1## (wherein n is 0 or 1, and where n is 1 each C.sub.6 R.sub.5 moeity may be the same or different; each group R is a hydrogen atom, an iodine atom or a hydrophilic moiety M or M.sub.1, two or three non-adjacent R groups in each C.sub.6 R.sub.5 moiety being iodine and at least one, and preferably two or three, R groups in each C.sub.6 R.sub.5 moiety being M or M.sub.1 moieties; X denotes a bond or a group providing a 1 to 7 atom chain linking two C.sub.6 R.sub.5 moieties or, where n is 0, X denotes a group R; each M independently is a non-ionic hydrophilic moiety; and each M.sub.1 independently represents a C.sub.1-4 alkyl group substituted by at least one hydroxyl group and optionally linked to the phenyl ring via a carbonyl, sulphone or sulphoxide group, at least one R group being an M.sub.1 moiety; with the proviso that where n is zero either at least one M.sub.1 group other than a hydroxymethyl or 1,2-dihydroxyethyl group is present or then if one hydroxymethyl or 1,2-dihydroxyethyl M.sub.1 group is present at least one nitrogen-attached or hydroxylated-C.sub.3-4 alkyl moiety-containing M group is also present) and isomers thereof.
摘要翻译:本发明提供了可用作式I的X射线对比剂的低粘度碘化芳基化合物(其中n为0或1,并且其中n为1,每个C 6 R 5的摩尔可以相同或不同;每个基团R为氢原子 ,碘原子或亲水部分M或M1,每个C 6 R 5部分中两个或三个不相邻的R基团是碘,并且每个C 6 R 5部分中至少一个,优选两个或三个R基团是M或M1部分; X 表示提供连接两个C 6 R 5部分的1至7个原子链的键或基团,或其中n为0,X表示基团R;每个M独立地为非离子亲水部分;并且每个M 1独立地表示C 1-4烷基 至少一个被至少一个羟基取代并且任选地通过羰基,砜或亚砜基团与苯环连接的基团,至少一个R基团是M1部分;条件是其中n为0,或者至少一个除了 存在羟甲基或1,2-二羟乙基, 甲基或1,2-二羟乙基M1基团存在,还存在至少一个含氮连接或羟基化的含C3-4烷基部分的M基团)及其异构体。
摘要:
There is provided a contrast medium composition comprising: (a) a first contrast agent comprising a physiologically tolerable manganese compound, a physiologically tolerable reducing compound containing an .alpha.-hydroxy ketone group, or salt thereof, having a manganese concentration of at least 0.3 mM or being in a dosage unit form containing at least 300 .mu.mol manganese, together with (b) a second contrast agent. Such compositions have been found to be particularly suited to imaging of the liver.
摘要:
The invention provides iodinated bis phenyl compounds, useful as X-ray contrast agents, of formula I ##STR1## (wherein each C.sub.6 R.sub.5 moeity may be the same or different; each R denotes a hydrogen or iodine atom or a group M, two or three non-adjacent R groups on each C.sub.6 R.sub.5 moiety denoting iodine atoms and one, two or three R groups on each C.sub.6 R.sub.5 moiety denoting M groups;X denotes a group providing a 1, 2 or 3 atom chain linking the two C.sub.6 R.sub.5 groups, preferably where X is or contains in the bridging chain a carbonyloxy group each C.sub.6 R.sub.5 group being a triodophenyl group or a group in which each R is other than hydrogen; and each M is independently a non-ionic hydrophilic moiety, M preferably being a non-ionic hydrophilic moiety comprising a monohydroxy- or polyhydroxy-alkyl group) and isomers, especially stereoisomers and rotamers, thereof.
摘要翻译:本发明提供了可用作式I的X射线造影剂的碘化双苯基化合物(其中每个C 6 R 5的摩尔可以相同或不同;每个R表示氢或碘原子或基团M,两个或三个不相邻的 每个C6R5部分上的R基团表示碘原子,每个C6R5部分上含有一个,两个或三个R基团,表示M基团; X表示提供连接两个C 6 R 5基团的1,2或3个原子链的基团,优选X为或含有 在该桥连环中,每个C 6 R 5基团为三苯基或每个R不为氢的基团,每个M独立地为非离子亲水部分,M优选为包含单羟基的非离子亲水部分 - 或多羟基 - 烷基)和异构体,特别是立体异构体和旋转异构体。
摘要:
The invention provides low viscosity iodinated aryl compounds, useful as X-ray contrast agents, of formula I ##STR1## (wherein n is 0 or 1, and where n is 1 each C.sub.6 R.sub.5 moeity may be the same or different; each group R is a hydrogen atom, an iodine atom or a hydrophilic moiety M or M.sub.1, two or three non-adjacent R groups in each C.sub.6 R.sub.5 moiety being iodine and at least one, and preferably two or three, R groups in each C.sub.6 R.sub.5 moiety being M or M.sub.1 moieties; X denotes a bond or a group providing a 1 to 7 atom chain linking two C.sub.6 R.sub.5 moieties or, where n is 0, X denotes a group R; each M independently is a non-ionic hydrophilic moiety; and each M.sub.1 independently represents a C.sub.1-4 alkyl group substituted by at least one hydroxyl group and optionally linked to the phenyl ring via a carbonyl, sulphone or sulphoxide group, at least one R group being an M.sub.1 moiety; with the proviso that where n is zero either at least one M.sub.1 group other than a hydroxymethyl or 1,2-dihydroxyethyl group is present or then if one hydroxymethyl or 1,2-dihydroxyethyl M.sub.1 group is present at least one nitrogen-attached or hydroxylated-C.sub.3-4 alkyl moiety-containing M group is also present) and isomers thereof.
摘要翻译:本发明提供了低分子量的碘化芳基化合物,其可用作式I(I)的X射线造影剂(其中n为0或1,并且其中n为1,每个C 6 R 5的摩尔可以相同或不同;每个 基团R是氢原子,碘原子或亲水部分M或M1,每个C 6 R 5部分中两个或三个不相邻的R基团是碘,并且每个C 6 R 5部分中至少一个,优选两个或三个R基团是 M或M1部分; X表示提供连接两个C 6 R 5部分的1至7个原子链的键或基团,或其中n为0,X表示基团R;每个M独立地为非离子亲水部分;并且每个M1 独立地表示被至少一个羟基取代并且任选地通过羰基,砜或亚砜基团连接到苯环的C 1-4烷基,至少一个R基团是M 1部分;条件是其中n为0, 存在除羟甲基或1,2-二羟乙基之外的至少一个M1基团 如果存在一个羟甲基或1,2-二羟乙基M1基团,则还存在至少一个含氮连接或羟基化的含C3-4烷基部分的M基团)及其异构体。
摘要:
The present invention relates to a method of generating an electron spin resonance enhanced magnetic resonance image of a sample which comprises introducing into the sample a magnetic resonance signal enhancing amount of a free radical and generating an enhanced electron spin resonance image of the sample. The method comprises using as the free radical an inert triarylmethyl free radical, wherein each aryl moiety of said triarylmethyl radical, which may be identical or different, comprises an optionally substituted 6-membered carbocyclic or thienyl ring. The invention also relates to the use of trityls in ESR imaging.
摘要:
The present invention provides the use of a persistent .pi.-system free radical for the manufacture of a contrast medium for use in magnetic resonance imaging, wherein the electron delocalising .pi.-system of said radical comprises at least one homo or heterocyclic ring, said radical being other than the chloranil semiquinone anion radical or a trityl radical. Also provided are magnetic resonance imaging contrast media containing and methods using such radicals.