Ultrasound contrast agents having microbubbles of gas or a gas precursor encapsulated by non-proteinaceous crosslinked or polymerised amphiphilic moieties, e.g. in the form of micelles, exhibit good stability in vivo upon administration and may if desired incorporate biodegradable linkages so as to possess particular desired levels of biodegradability.
超声造影剂具有气泡或气体前体微囊,其被非蛋白交联或聚合的两性分子封装,例如以胶束形式,体内给药后表现出良好的稳定性,并且如有需要可以包含可
生物降解的连接,以具有特定所需的
生物降解
水平。