呼吸功能的四维计算机断层扫描改变了肺癌放射治疗后的呼吸功能
Shiho Wada1, Tomohiro Itonaga1, Ryuji Mikami1
1Department of Radiology, Tokyo Medical University Hospital, Tokyo, JPN.
Cureus
|February 23, 2026
概括
这份病例报告显示,放射治疗可以导致长期的肺功能变化. 四维计算机断层扫描 (4DCT) 揭示了肺癌治疗后与剂量相关的通风下降.
科学领域:
- 肺部成像扫描 肺部成像扫描
- 辐射瘤学 辐射瘤学
- 医学物理 医学物理
背景情况:
- 放射治疗 (RT) 对肺癌治疗至关重要,但其对区域肺功能的长期影响尚未完全理解.
- 评估治疗后的肺部变化对于患者管理和肺部保存策略至关重要.
研究的目的:
- 为了研究辐射剂量与肺癌放射治疗后区域肺功能纵向变化之间的关联.
- 评估基于可变形图像注册 (DIR) 的四维计算机断层扫描 (4DCT) 通风成像在单个患者病例中的实用性.
主要方法:
- 一名患有IIIA期肺癌的患者接受了化疗放射治疗.
- 基于可变形图像记录 (DIR) 的4DCT通风成像在RT前,RT后6个月和RT后1年进行.
- 分析重点是照射和非照射肺部区域的体积和功能变化.
主要成果:
- 被辐射的右上叶体积减少,随着时间的推移,收缩率增加.
- 在RT后一年,未经辐射的左下叶体积增加了11%,收缩率略有下降.
- 4DCT衍生的通风显示了持续的,与剂量相关的下降,即使在低剂量区域,一年后RT.
结论:
- 这一案例表明,将功能成像与解剖CT整合起来,可以帮助RT后的随访和肺部保护.
- 研究结果突出显示,在肺癌放射治疗后,可能存在与剂量相关的长期通风障碍.
- 局限性包括单个患者设计,DIR依赖性和缺乏肺功能测试.
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