实用医学杂志 ›› 2024, Vol. 40 ›› Issue (22): 3119-3123.doi: 10.3969/j.issn.1006-5725.2024.22.001

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磁共振影像学改变评估肝癌立体定向放疗精度的研究进展

叶惠玲1,2,钟仁明1()   

  1. 1.四川大学华西临床医学院/华西医院放射物理技术中心 (四川 成都 610041 )
    2.四川大学华西医院医学装备;创新研究中心 (四川 成都 610041 )
  • 收稿日期:2024-08-01 出版日期:2024-11-25 发布日期:2024-11-25
  • 通讯作者: 钟仁明 E-mail:zrm_100@163.com
  • 作者简介:钟仁明,肿瘤学博士,主任技师,硕士研究生导师,美国斯坦福大学访问学者,四川大学华西医院放射物理技术中心书记。从事放疗领域医疗、教学、科研20余年。四川省海外高层次留学归国人员、四川省学术和技术带头人后备人选、西部放射治疗协会放射治疗技术专业委员会副主任委员、四川省国际医学交流促进会精确放射治疗专业委员会常委、四川省肿瘤学会人工智能与大数据专委会常委。在国内外学术期刊发表论文100余篇,并作为项目负责人/主要参与者参与国家自然科学基金青年基金项目、面上项目、省科技厅项目15项,计算机软件著作权1项,四川省科学技术进步奖(科技进步类)三等奖1项。主编、副主编、参编教材著作4部。
  • 基金资助:
    四川省科技计划项目(24ZDYF1028)

Progress in assessing the treatment accuracy of liver stereotactic body radiotherapy through post-therapeutic magnetic resonance imaging morphologic alterations

Huiling YE1,2,Renming. ZHONG1()   

  1. *.Radiotherapy Physics & Technology Center,Cancer Center,West China Hospital,Sichuan University,Chengdu 610041,Sichuan,China
    *.Innovation Institute for Integration of Medicine and Engineering,Med?X Center for Manufacturing,West China Hospital,Sichuan University,Chengdu 610041,Sichuan,China
  • Received:2024-08-01 Online:2024-11-25 Published:2024-11-25
  • Contact: Renming. ZHONG E-mail:zrm_100@163.com

摘要:

在原发性肝癌和转移性肝癌治疗中,可以采用立体定向放射治疗技术(SBRT)给予肿瘤高剂量以达到消融治疗的效果。由于SBRT单次高剂量的特点,使其对放疗精度有更高的要求。尤其是肝癌受摆位误差与呼吸运动的影响,需要同时使用呼吸运动管理和影像引导。然而,现有研究者报道的放疗精度验证均使用模体进行间接验证,而不是在患者治疗实施过程中进行在体验证,使得最终的治疗精度受到怀疑。肝脏在接受一定放射治疗剂量后会在磁共振影像中呈现相应的形态学改变,可以反映放射治疗的精度。该文将就肝癌体部立体定向放射治疗后磁共振影像改变的发生原理、表现形式和出现时间、精度评价方式、临床困境及未来发展方向进行讨论分析。

关键词: 磁共振影像, 体部立体定向放射治疗, 肝癌, 呼吸运动管理

Abstract:

In the treatment of primary liver cancer and metastatic liver cancer, stereotactic body radiotherapy (SBRT) can be utilized to administer high doses of radiation for achieving ablative therapeutic effects. Given the singular nature of delivering high-dose radiation through SBRT, a higher level of precision is required in radiation therapy. Particularly, liver cancer is susceptible to positioning errors and respiratory motion, necessitating the implementation of respiratory motion management and image guidance techniques. However, existing accuracy verification methods for radiation therapy primarily rely on phantom studies, making it challenging to conduct in?vivo verification during treatment execution. Research has indicated that the liver exhibits corresponding morphological changes in magnetic resonance imaging following exposure to specific doses of radiation therapy, thereby serving as an indicator for assessing treatment accuracy. This article aims to discuss and analyze the principles underlying magnetic resonance imaging alterations after stereotactic body radiotherapy for liver cancer, including their manifestations, timing of appearance, evaluation methodologies for accuracy assessment, clinical challenges encountered during implementation, as well as future directions for development.

Key words: magnetic resonance imaging, stereotactic body radiotherapy, liver cancer, respiratory motion management strategy

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