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相关概念视频

Computed Tomography01:10

Computed Tomography

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Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
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相关实验视频

Updated: Jul 1, 2025

3D Imaging of Soft-Tissue Samples using an X-ray Specific Staining Method and Nanoscopic Computed Tomography
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一个碳纳米管X射线源阵列,为新的多源形束计算机断层扫描仪设计.

Boyuan Li1, Christina R Inscoe1, Shuang Xu2

  • 1Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America.

Physics in medicine and biology
|March 12, 2024
PubMed
概括

一个新的碳纳米管 (CNT) 的X射线源阵列能够更快的多源圆束计算机断层扫描 (ms-CBCT) 成像. 这项技术显著减少了面成像中的散射和人工物,提高了诊断准确度.

关键词:
在CBCT中,CBCT是CBCT.碳纳米管的使用方法圆梁文物 圆梁文物现场发射X射线X射线.多种多种资源的多种资源.减少分散,减少分散.在X射线成像中使用X射线成像.

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相关实验视频

Last Updated: Jul 1, 2025

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科学领域:

  • 医疗成像医学成像
  • 材料科学 材料科学 材料科学
  • 物理 物理学 物理

背景情况:

  • 传统的形束计算断层扫描 (CBCT) 受到散射和形束文物的限制.
  • 这些文物可以降低图像质量,并影响面成像中的诊断准确性.

研究的目的:

  • 开发和描述一个快速扫描的碳纳米管 (CNT) 场辐射X射线源阵列.
  • 实现多源CBCT (ms-CBCT) 成像方案,克服传统CBCT的局限性.

主要方法:

  • 设计和制造了一个为ms-CBCT的八个焦点点的CNTX射线源阵列.
  • 使用外部聚合器来缩小X射线束角.
  • 用一个平板探测器连续旋转物体周围时,以轴向扫描了阵列.

主要成果:

  • 实现了一致的焦点尺寸 (1.10 ± 0.04 毫米 × 0.84 ± 0.03 毫米) 和光束角 (2.4 ° ± 0.08).
  • 证明了快速的X射线束切换 (上升/减弱时间为0.21毫秒/0.19毫秒).
  • 获得高剂量速率 (8245 μGy s-1没有Cu过器) 在运行周期中变化微不足道.

结论:

  • 开发的CNT x射线源阵列使得一个新的ms-CBCT系统成为可能.
  • 这种ms-CBCT方法有效地克服了传统CBCT固有的局限性.
  • 该系统在14.4秒的快速扫描时间内达到临床CBCT成像剂量水平.