单源双能CT单能量图像显示直肠癌腹膜返折的价值

发布时间：2018-01-11 03:15

本文关键词：单源双能CT单能量图像显示直肠癌腹膜返折的价值　出处：《中国临床医学影像杂志》2016年09期 　论文类型：期刊论文

【摘要】：目的:探讨单源双能CT单能量图像显示直肠癌腹膜返折的价值。方法:回顾性分析105例行单源双能CT扫描并经手术病理证实的直肠癌患者资料,由两位观察者对混合能量图像和40~140 keV每间隔10 keV而得到的11组单能量图像中腹膜返折的显示情况进行主观评分,对两位观察者各组评分结果的一致性进行Kappa检验;采用Mann-Whitney U检验将11组单能量图像的主观评分结果分别与混合能量图像进行比较;将混合能量图像与单能量评分最高组图像中直肠癌与腹膜返折位置关系与术中所见进行对照,应用卡方检验比较两组图像对肿瘤位置判断的符合率。结果:两位观察者对各组图像质量评分的一致性较好或一般。50~80 keV图像质量评分高于混合能量图像,差异均有统计学意义(P0.05),其中60 keV图像评分最高。混合能量图像与60 keV图像对直肠癌与腹膜返折位置关系的判断符合率分别为80.95%、89.52%,差异具有统计学意义(P0.05)。结论 :单源双能CT 50~80 keV图像显示腹膜返折的图像质量优于混合能量图像,以60 keV图像最佳,其对腹膜返折与直肠癌位置关系的判断符合率高于混合能量图像,具有一定临床价值。
[Abstract]:Objective: to evaluate the value of single source and dual energy CT in displaying peritoneal reflux of rectal cancer. Methods: 105 cases of rectal cancer with single source and dual energy CT scan proved by surgery and pathology were analyzed retrospectively. The display of peritoneal reflux in 11 groups of single energy images was evaluated by two observers on mixed energy images and 40,140 keV images at intervals of 10 keV. Kappa test was performed on the consistency of the scores of the two observers. The subjective scores of 11 groups of single energy images were compared with mixed energy images by Mann-Whitney U test. The relationship between the location of rectal cancer and peritoneal reflexes in the highest single energy score group and mixed energy images was compared with the intraoperative findings. Chi-square test was used to compare the coincidence rate of tumor location between two groups of images. Results: the consistency of image quality score between the two groups was better or average .500.80. KeV image quality score was higher than mixed energy image. The difference was statistically significant (P 0.05). Among them, 60 keV images had the highest score. The coincidence rates of mixed energy images and 60 keV images in judging the position of rectal cancer and peritoneal refraction were 80.955% and 89.52%, respectively. The difference was statistically significant (P 0.05). Conclusion: the image quality of single source and dual energy CT 5080 keV images is superior to that of mixed energy images. 60 keV images were the best, and the coincidence rate of peritoneal reflux and rectal cancer location was higher than that of mixed energy images, which had certain clinical value.
【作者单位】：大连医科大学附属第一医院放射科;
【分类号】：R735.37;R730.44
【正文快照】： 不同位置的直肠癌在治疗方案与预后判断方面均存在差异[1],腹膜返折是判定直肠癌病灶位于腹膜腔内外的重要标记[2],可以对直肠癌的术前评估提供有效参考。CT现已逐步成为直肠癌术前的常规检查,可以提供肿瘤浸润深度、范围及有无转移等重要信息。许多研究已经证实单源双能CT单

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