The present application discloses treating water insoluble nanoparticles, particularly nanoparticles of metals and metal compounds which find utility in diagnostic imaging such as MR and X-ray imaging, with an alpha-hydroxyphosphonic acid conjugate with a hydrophilic moiety to render the nanoparticles sufficiently hydrophilic to find utility in diagnostic imaging. Among the modified hydrophilic nanoparticles disclosed are those in which the hydrophilic moieties of the modifying conjugate are ethylene oxide based polymers and copolymers and zwitterions and the nanoparticles are composed of transition metal oxides such as superparamagnetic iron oxide and tantalum oxide. Disclosed are nanoparticles which are sufficiently hydrophilic to form stable aqueous colloidal suspensions. Also disclosed is diagnostic imaging such as MR and X-ray using the modified hydrophilic nanoparticles as contrast agents.
本申请公开了一种处理
水不溶性纳米颗粒的方法,特别是处理在诊断成像中有用的
金属和
金属化合物纳米颗粒,例如MR和X射线成像,使用具有亲
水性基团的α-羟基
膦酸共轭物将纳米颗粒进行修饰,使其具有足够的亲
水性在诊断成像中发挥作用。其中修改的亲
水性纳米颗粒包括以
乙烯氧基聚合物和共聚物以及离子性分子为基础的修饰共轭物的亲
水性基团和由过渡金属氧化物组成的纳米颗粒,例如超顺磁性
铁氧体和
钽氧化物。还公开了足够亲
水性以形成稳定
水溶胶悬浮液的纳米颗粒。同时还公开了使用修改后的亲
水性纳米颗粒作为对比剂进行诊断成像,例如MR和X射线成像。