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German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with...
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The most common cardiovascular diagnostic test is an X-ray. It produces images of the heart, blood vessels, and adjacent structures.
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An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...
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相关实验视频

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Contrast Enhanced Vessel Imaging using MicroCT
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通过干涉度相对照X射线技术进行船舶成像.

Tohoru Takeda1, Atsushi Momose, Jin Wu

  • 1Institute of Clinical Medicine, University of Tsukuba, Tsukuba-shi, Ibaraki, Japan. ttakeda@md.tsukuba.ac.jp

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|April 10, 2002
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概括

相对照X射线成像可以清楚地看到软组织中的小血管,与传统方法相比,提供更高的细节. 这种技术使用生理盐水来增强血管结构的成像,使用低剂量的X射线.

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科学领域:

  • 医疗成像医学成像
  • 生物物理学的生物物理.
  • 射线光学X射线光学

背景情况:

  • 与吸收对比方法相比,相对比X射线成像对低原子数元素 (H,C,N,O) 的灵敏度明显更高.
  • 精确的血管结构成像对于理解器官和瘤生物学至关重要.
  • 这项研究研究了选择性血管造影,在生理材料上使用相对比.

研究的目的:

  • 评估相对比X射线成像用于选择性血管造影的潜力.
  • 为了比较相位对比成像与吸收对比成像的疗效,用于可视化血管.

主要方法:

  • 阶段对比X射线成像使用同步X射线源进行.
  • 测量了各种生理溶液和人工血液的折射率 (delta) 的差异.
  • 由于其高对比度,为血管成像选择了生理盐水.

主要成果:

  • 阶段对比X射线成像清楚地显示了大于0.03毫米的血管在切割的老鼠和子肝脏中.
  • 吸收对比X射线成像未能揭示这些小血管.
  • 微球对比度增强的吸收对比图像仅显示在可比的X射线剂量下,门静脉大于0.1毫米.

结论:

  • 阶段对比的X射线成像可以使用生理盐水清晰地描绘血管.
  • 该技术需要显著降低X射线剂量,以有效的血管成像.