扩散MRI用于预测直肠癌对化疗辐射的反应
Andrzej Dzik-Jurasz1, Claudia Domenig, Mark George
1UK Cancer Research Clinical Magnetic Resonance Research Group, Institute of Cancer Research, Royal Marsden NHS Trust, Downs Road, Sutton SM2 5PT, UK. andrzej@icr.ac.uk
Lancet (London, England)
|July 31, 2002
概括
表面扩散系数 (ADC) 预测直肠癌的治疗反应. 较低的治疗前ADC值与化疗和化疗辐射后较大的瘤大小减少相关,有助于治疗规划.
科学领域:
- 在瘤学瘤学.
- 放射学 放射学是一门学科.
- 医疗成像医学成像
背景情况:
- 预测瘤对新辅助疗法的反应对于优化局部晚期直肠癌治疗策略至关重要.
- 表面扩散系数 (ADC) 是一种对组织水含量和细胞性敏感的磁共振成像 (MRI) 生物标志物,可能反映瘤缩.
研究的目的:
- 调查通过定量MRI扩散成像测量平均瘤水ADC与局部晚期直肠癌患者治疗反应之间的相关性.
- 评估预治疗前ADC在新辅助化疗和化疗辐射后瘤缩的预测价值.
主要方法:
- 使用定量磁共振扩散成像测量了14名患者的平均瘤水ADC.
- 在新辅助化疗和化疗辐射治疗之前和之后进行了ADC测量.
- 瘤反应的评估是治疗后瘤大小的百分比变化.
主要成果:
- 在化疗后的平均预治疗瘤水ADC和百分比大小变化之间观察到显著的负相关性 (r=-0.67,p=0.01).
- 在平均预治疗瘤水ADC和化学辐射后的百分比大小变化之间发现了更强的负相关性 (r=-0.83,p=0.001).
- 化学疗法后响应者中持续的低ADC值可能表明非活性的瘤组织减少.
结论:
- 预处理瘤水ADC是一种有价值的成像生物标志物,用于预测局部晚期直肠癌中新辅助疗法的反应.
- 治疗前较低的ADC值与较大的瘤缩有关,这表明早期治疗疗效评估的可能性.
- ADC测量可以帮助量身定制治疗策略和监测直肠癌管理中的治疗效果.
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