单指数和多重数学模型在局部晚期直肠癌对新辅助化学放射治疗的反应中的预测值
Mi Zhou1, Mengyuan Chen2, Meining Chen3
1sichuan provincial orthopedics hospital, Chengdu, China.
Abdominal radiology (New York)
|September 14, 2024
概括
先进的扩散加权成像模型,特别是连续时间随机步行 (CTRW) 模型,在预测局部晚期直肠癌 (LARC) 中新辅助化学放射治疗 (nCRT) 响应方面表现有前途. 这些成像标记可以评估治疗的有效性和nCRT后的瘤下降阶段.
科学领域:
- 放射学 放射学是一门学科.
- 在瘤学瘤学.
- 医疗成像医学成像
背景情况:
- 局部晚期直肠癌 (LARC) 需要有效的新辅助化学放射治疗 (nCRT) 来改善结果.
- 准确预测nCRT反应对于个性化治疗策略至关重要.
- 扩散权重成像 (DWI) 提供了对组织微观结构的洞察,可能预测治疗反应.
研究的目的:
- 评估单指数和多重数学DWI模型对LARC患者nCRT反应的预测能力.
- 评估各种DWI参数预测病理完整反应 (pCR) 和瘤下降阶段 (T-下降阶段) 的能力.
主要方法:
- 一项针对103名接受nCRT的LARC患者的前性研究.
- 使用3.0-T扫描仪获得了酒后驾驶的MRI扫描.
- 来自明显扩散系数 (ADC),伸展指数模型 (SEM),连续时间随机步行 (CTRW) 和分数顺序微积分 (FROC) 模型的参数被分析.
主要成果:
- 在nCRT后的pCR组中,几个DWI参数 (SEM-α,SEM-DDC,CTRW-α,CTRW-β,CTRW-D,FROC-β,ADC) 在pCR组显著更高.
- CTRW (α+β+D) 在预测pCR方面表现最好 (AUC=0.840).
- 在nCRT前的CTRW (α+β) 预测pCR具有90.3%的灵敏度和43.1%的特异性 (AUC=0.652).
- CTRW (α+D) 在nCRT后的T下阶段评估中表现强 (AUC=0.877).
结论:
- 来自CTRW模型的成像标记物具有很大的潜力,可以在nCRT之前预测瘤反应.
- 基于CTRW的参数对于在LARC患者的nCRT后评估pCR和T下降阶段是有价值的.
- 这些发现支持在LARC中使用先进的DWI模型来评估治疗反应.
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