多种影像学技术在食管癌放疗后疗效评估中的应用

Application of imaging techniques in evaluation of radiotherapeutic effect for esophageal carcinoma

目前公认的食管癌放疗后近期疗效的评价标准为食管X线钡餐造影三级分类法，但该方法仍存在一定的局限性。CT从形态学方面观察食管壁及转移灶的变化情况；正电子发射计算机断层扫描可观察病变组织的代谢活动；而磁共振的弥散加权成像可以通过组织内部水分子扩散运动的改变观察放疗后食管病变的坏死情况。综合多种手段对食管癌疗效评估已成为一种趋势。

The gold standard evaluation criteria of radiotherapeutic effect at the present time is the three-level classification of X-ray barium meal. However, this method has certain limitations. Morphological changes in esophagus wail and metastases after radiotherapy can be observed on computed tomography scanning. A positron emission tomography scan is a sensitive imaging test to observe the metabolic activity in pathologic cells and tissues. And diffusion-weighted magnetic resonance imaging could provide the esophageal tumor necrosis information ＇after radiotherapy by observing the changes of water molecular diffusion. With the development of medical imaging techniques, using various means in a comprehensive way to evaluate radiotherapeutie effect for esophageal carcinoma patients may become a trend.