摘要
目的评估MRI/CT影像融合对鼻咽癌靶区勾画的精确性。方法对2009年1月～2009年6月收治的初治鼻咽癌患者32例,分别基于MRI/CT融合图像及增强CT图像勾画GTV并计算比值,定义比值介于0.9与1.1之间为两种靶区勾画方法体积接近,否则为差异明显。结果两种靶区勾画方法体积接近的仅8例,占25%,而75%的病例,两者体积差异明显。差异明显病例与其鼻咽肿瘤在MRI及CT影像中所显示的侵犯范围不同有关。结论由于MRI在显示鼻咽肿瘤方面明显优于CT,但却不能完全替代CT,MRI/CT影像融合能把MRI与CT图像结合,互补不足,其显示鼻咽肿瘤的情况优于单独的MRI或CT图像,故MRI/CT融合图像能提高靶区勾画的准确性,更利于精确放疗的实施。
Objective To study the influence of CT/MRI fusion image on precise definition of the target volumes of nasopharyngeal carcinoma. Methods We compared CT/MRI fusion image and enhance CT image on definition of the gross tumor volume（GTV） and calculated their ratio in 32 patients with nasopharyngeal carcinoma between January 2009 and June 2009. When the ratio was between 0. 9 and 1.1 ,we defined that both definitions of GTV were similar,otherwise we defined that they were difference. Results GTV were similar in 8 patients （25%）, and were difference in other patients （75 % ）. The difference was due to the different encroaching areas displayed in MRI and CT images. Conclusion MRI is superior to but could not replace CT in the delineation of target volumes in patients with nasopharyngeal carcinoma. CT/MRI fusion image could improve the accuracy of the target delineation.
出处
《实用癌症杂志》
2010年第2期172-174,共3页
The Practical Journal of Cancer
