在激光间歇性热疗法后的大脑转移中的体积测量和扩散MRI纵向模式
Francesco Sanvito1,2, Jingwen Yao3,4, Gianluca Nocera3,4,5,6,7
1UCLA Brain Tumor Imaging Laboratory (BTIL), Center for Computer Vision and Imaging Biomarkers, University of California Los Angeles, Los Angeles, CA, USA. fsanvito@mednet.ucla.edu.
European radiology
|April 18, 2025
概括
用激光间歇性热疗法 (LITT) 治疗的大脑转移 (BM) 通常会显示早期扩大和扩散限制. 进展通常只有在3-4个月后才能检测到,因为早期的变化可以模仿治疗反应.
科学领域:
- 神经瘤学神经瘤学
- 放射学 放射学是一门学科.
- 神经外科 神经外科
背景情况:
- 激光间歇性热疗法 (LITT) 是对大脑转移 (BM) 的新兴治疗方法.
- 在BM的LITT之后的X光图案需要彻底的表征.
研究的目的:
- 为了描述LITT后的BM中的MRI变化.
- 根据成像发现,区分持久反应和早期进展.
主要方法:
- 从LITT治疗的BM患者的纵向MRI扫描进行了回顾性分析.
- 治疗反应的分类 (持续的反应,稳定的疾病,进展).
- 对增强对比度,不增强对比度和整个病变子区域的体积和扩散MRI变化的分析.
主要成果:
- 后LITT扫描显示病变普遍扩大,特别是在增强对比度的部分 (+77%).
- 表面扩散系数 (ADC) 显著下降 (-224 × 10−6 mm2/s),特别是在中央非增强元件中.
- 数学建模表明,响应的病变缩小了79.83天的中位数"伪半衰期",而进展的病变在27天的中位数后增长了.
- 最佳的后续扫描时间为23天和125天,在识别进展方面显示82%的准确性.
结论:
- 在LITT后,BM通常会出现早期体积增加和扩散限制.
- 响应的病变表明随着时间的推移,双指数收缩和扩散增加.
- 由于重叠的早期放射图案,往往只有在3-4个月后才能可靠地检测到进展.
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