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转盘微型CT扫描仪用于小鼠动态 perfusion 成像:设计,实施和评估.

A J Allphin1, R Nadkarni1, D P Clark1

  • 1Quantitative Imaging and Analysis Lab, Department of Radiology, Duke University Medical Center, Durham, NC, United States of America.

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概括

一台新的桌面微型CT扫描仪为临床前研究提供高分辨率,低剂量动态成像. 这种先进的系统可以在小鼠中进行详细的 perfusion 映射,从而推动疾病研究.

关键词:
生物打印的幻影对比剂对比剂是一种对比剂.在微型CT中,我们可以使用微型CTperfusion 图像成像技术的使用在临床前的临床前.

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科学领域:

  • 医疗成像医学成像
  • 临床前研究 临床前研究
  • 生物医学工程 生物医学工程

背景情况:

  • 临床前成像需要高分辨率,低剂量动态能力.
  • 现有的微型CT系统在动态 perfusion 成像方面可能存在局限性.
  • 为了更好地了解体内疾病机制,需要取得进展.

研究的目的:

  • 推出一种新的桌面微型计算机断层扫描 (micro-CT) 扫描仪,用于小鼠的动态 perfusion 成像.
  • 提高高分辨率和低辐射剂量的临床前成像.
  • 评估系统的静态和动态性能,用于定量输液分析.

主要方法:

  • 开发了一个定制的桌面微型CT系统,用于循环和螺旋扫描.
  • 实现了3.125秒的时间分辨率和65微米的同位素声音尺寸的图像重建.
  • 验证了使用QA幻象的静态性能和使用3D生物打印幻象和体内小鼠模型的动态性能.

主要成果:

  • 静态性能符合空间分辨率和统一性的标准质量指标.
  • 动态幻影研究显示了线性血动力流量测量和精确的 perfusion 度量定量.
  • 在体内成像显示了小鼠大脑,肺和脏的详细 perfusion 地图,检测生理变异.

结论:

  • 新型转盘微型CT系统为高分辨率,低剂量动态临床前成像提供了显著的进步.
  • 该系统有效地捕捉了各种器官的动态输液,有助于研究阿尔茨海默氏症和心血管疾病等疾病.
  • 未来的发展将重点是改善时间分辨率,光谱能力,并纳入深度学习以进行增强分析.