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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: May 1, 2026

Dynamic Lung Tumor Tracking for Stereotactic Ablative Body Radiation Therapy
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评估适应性放射治疗的CBCT校正算法

Caleb Sawyer1,2, Jihye Koo2, Arash Naghavi2

  • 1University of South Florida, Tampa, USA.

Technology in cancer research & treatment
|February 27, 2026
PubMed
概括
此摘要是机器生成的。

一个新的形束计算断层扫描 (CBCT) 校正算法显示了适应性放射治疗 (ART) 的前景. 这种方法可以通过每日CBCT扫描更快地进行治疗规划,而不会影响剂量的准确性.

关键词:
在CBCT中进行校正.在CBCT质量方面.适应性规划 适应性规划适应性辐射疗法 (ART)头部和部的规划 (H&N规划)肉瘤规划 计划中的肉瘤

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科学领域:

  • 医学物理 医学物理
  • 放射治疗技术 放射治疗技术
  • 图像处理 图像处理

背景情况:

  • 适应性放射治疗 (ART) 旨在提高治疗效率.
  • 每日形束计算断层扫描 (CBCT) 越来越多地用于放射治疗.
  • 准确的图像数据对于有效的适应性规划至关重要.

研究的目的:

  • 评估使用CBCT校正算法用于日常治疗计划的可行性.
  • 评估CBCT校正对ART中剂量计算准确性的影响.
  • 要确定算法是否可以减少重新模拟的需要.

主要方法:

  • 一个CBCT校正算法应用于幻影和患者数据.
  • 处理CBCT图像以减少文物,并计划匹配CT强度.
  • 在CT上生成的治疗计划在更正的CBCT上重新计算.
  • 用3%/2毫米的马分析分析了剂量差异.

主要成果:

  • CBCT校正算法在肺幻影上产生了高剂量一致.
  • 所有14个患者计划 (头,瘤) 在校正后都实现了>95%的马通过率.
  • 该算法有效地生成了纠正的CBCT用于治疗规划.

结论:

  • CBCT校正算法显示了更快的线下自适应规划的潜力.
  • 这种方法可以减少重复CT扫描 (重复模拟) 的需要.
  • 通过使用修正的CBCT数据来保持剂量计算的准确性.