Composition in the form of a shaped device, for use as a fiducial marker in tissues in the animal body, in radiotherapy and/or radiosurgery, characterized in that it comprises:—a core consisting of a colloidal dispersion of metal nanoparticles and/or oxides or metal salts having X-ray-contrast properties, where said nanoparticles are stabilized with surfactants, polymers or capping agents in a liquid vehicle, and—a polymeric casing that encapsulates the core, said device having a minimum size of not less than 500 microns and a maximum size not greater than 3000 microns.
形装置形式的组合物,可用作动物体内组织的靶标,用于放射治疗和/或放射外科手术,其特征在于该组合物包括-由具有 X 射线对比特性的
金属纳米颗粒和/或
氧化物或
金属盐的胶体分散体组成的内核,其中所述纳米颗粒在液体载体中用
表面活性剂、
聚合物或封盖剂稳定;以及封装内核的
聚合物外壳,所述装置的最小尺寸不小于 500 微米,最大尺寸不大于 3000 微米。