探讨检查前准备对直肠癌高分辨率MRI检查质量的影响，评估2种不同直肠充盈方法肠道准备方法的应用价值。

总结中山大学附属第一医院2014年11月至2015年6月间73例直肠癌患者的高分辨率MRI检查资料，探讨分别以水和超声耦合剂作为直肠肠腔内对比剂2种直肠充盈方法的肠道准备的舒适满意度和对直肠癌高分辨率MRI扫描检查图像质量的影响。

73例患者均顺利完成高分辨率MRI检查。患者扫描前直肠充盈的准备舒适满意度总体有效率为86.30%(63/73)；图像质量良好率为90.41%(66/73)。MRI扫描前以水和超声耦合剂2种直肠充盈方法的舒适满意度比较差异具有统计学意义(77.14% vs.94.14%，χ²＝19.98，P<0.001)。以水和超声耦合剂2种直肠充盈方法的直肠癌高分辨率MRI扫描的图像质量比较差异有统计学意义(82.86% vs.97.37%，χ²＝29.91，P<0.001)。

直肠癌的高分辨MRI检查中，适量使用超声耦合剂能够明显提高患者检查的舒适满意度，并且能提高MRI图像质量。

To investigate the effect of different methods of preparation on the quality of rectal MRI examination, and to evaluate the application value of the two different rectal fillings.

The high resolution MRI examination data of 73 patients with rectal carcinoma from November 2014 to June 2015 in First Affiliated Hospital of Sun Yat-sen University were summarized.The rectal contrast agents were water and coupling gel filling in the two groups before examination, respectively.The comfort and satisfaction index of patients and the quality of high-resolution MRI imaging were compared between the two groups.

All the patients finished the examination effectively.The comfort index of patients reached 86.3%(63/73)in total, and the quality of imaging deserved well was as much as 90.41%(66/73)overall.Significant differences were found in the comfort index(77.14% vs.94.14%, χ²=19.98, P<0.001)and quality of MRI imaging(82.86% vs.97.37%, χ²=29.91, P<0.001)of patients with water and coupling gel.

Appropriate use of coupling gel filling in rectum can improve the comfort and satisfaction index of patient and the quality of MRI imaging in high-resolution MRI imaging examination for rectal carcinoma patients.