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    • 9. 发明申请
    • APTAMER LABELED WITH F-19 NUCLEUS FOR TARGETED MOLECULAR IMAGING BY MRI
    • 标有F-19核子的APTAMER通过MRI进行靶向分子成像
    • WO2012076191A1
    • 2012-06-14
    • PCT/EP2011/006255
    • 2011-12-12
    • MERCK PATENT GMBHGUENTHER, RalfHOCK, BjoernGOODMAN, SimonPIATER, Birgit
    • GUENTHER, RalfHOCK, BjoernGOODMAN, SimonPIATER, Birgit
    • A61K49/12
    • C12N15/115A61K49/12A61K49/126
    • Magnetic Resonance Imaging, usually based on 1 H as the magnetic nucleus, is an important diagnostic technique that is commonly used in hospitals for the diagnosis of disease. MRI allows for the non- invasive imaging of soft tissue with a superb spatial resolution. Magnetic Resonance Imaging based on 19 F instead of 1 H opens up new diagnostic possibilities. The 19 F nucleus has a high gyromagnetic ratio (40 MHz/T) and a natural isotopic abundance ratio of 100%. In the human body, 19 F containing structures are exclusively present in the form of solid salts in e.g. teeth and bones. As a consequence, the J2 relaxation times of the endogenous 19 F atoms are extremely short and the MR signal is hardly detectable, in other words, the lack of endogenous, 19 F-based structures with relatively high transverse relaxation times assures a very low background MR signal. Therefore, exogenous 19 F-based MRI contrast agents allow for "hot spot" imaging in a way similar to other techniques such as PET (positron emission tomography). As a useful extension of its diagnostic use, MRI is also proposed for the monitoring of the delivery of bio-active agents such as therapeutic or diagnostic agents. I.e., MRI can not only be used for treatment planning, but also to control local drug delivery under image guidance.
    • 磁共振成像通常以1H为磁核,是医院常用于诊断疾病的重要诊断技术。 MRI允许具有极好的空间分辨率的软组织的非侵入性成像。 基于19F而不是1H的磁共振成像开辟了新的诊断可能性。 19F核具有高回旋比(40MHz / T)和100%的天然同位素丰度比。 在人体中,含有19F的结构仅以例如固体盐的形式存在。 牙齿和骨头。 因此,内源性19F原子的J2松弛时间非常短,并且MR信号几乎不可检测,换句话说,缺乏具有相对较高的横向弛豫时间的内源性19F基结构,确保非常低的背景MR信号 。 因此,外源性基于19F的MRI造影剂允许以与PET(正电子发射断层摄影)等其他技术相似的方式进行“热点”成像。 作为其诊断用途的有用扩展,还提出了用于监测生物活性剂如治疗剂或诊断剂的递送的MRI。 即,MRI不仅可以用于治疗计划,还可以在图像引导下控制局部药物传播。