1-(3,17-Dihydroxy-10,13,16-trimethyl-1,2,3,4,7,8,9,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-17-yl)ethanone

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 类固醇和类固醇衍生物
• 英文名称: 1-(3,17-Dihydroxy-10,13,16-trimethyl-1,2,3,4,7,8,9,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-17-yl)ethanone
• 化学式: C₂₂H₃₄O₃
• 分子量: 346.5
• InChiKey: MDCCMZGGNCMFPQ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.3
• 重原子数：
  25
• 可旋转键数：
  1
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.86
• 拓扑面积：
  57.5
• 氢给体数：
  2
• 氢受体数：
  3

文献信息

• Method of forming subtraction images
  申请人：Arakawa Satoshi

  公开号：US20050195943A1

  公开（公告）日：2005-09-08

  A radiation image signal is acquired from a radiation image of an object before being injected with a contrast medium, and a radiation image signal is acquired from a radiation image of the same object after being injected with the contrast medium. A subtraction process for subtracting image signal components of a plurality of the thus acquired radiation image signals, which image signal components represent corresponding pixels in the radiation images represented by the plurality of the radiation image signals, from one another is performed. A contrasted radiation image, in which a pattern of a specific structure of the object having been contrasted with the contrast medium in the radiation image has been extracted or enhanced, is thus formed. The contrast medium is a liposome, which contains a hydrophobic iodine compound as a film forming constituent.

  在注入造影剂之前，从物体的辐射图像中获取辐射图像信号，在注入造影剂之后，从同一物体的辐射图像中获取辐射图像信号。执行一个减法过程，将由此获取的多个辐射图像信号的图像信号分量相互减去，这些图像信号分量代表多个辐射图像信号所代表的辐射图像中的相应像素。这样就形成了对比辐射图像，其中提取或增强了辐射图像中被对比介质对比的物体的特定结构的图案。对比介质是一种脂质体，它含有一种疏水性碘化合物作为成膜成分。