首都医科大学学报 ›› 2018, Vol. 39 ›› Issue (2): 185-189.doi: 10.3969/j.issn.1006-7795.2018.02.006

• 影像新技术的临床与科研应用 • 上一篇    下一篇

多层螺旋CT低剂量扫描在CT引导下氩氦刀治疗肺癌时的应用价值

李胜鳌, 李琦, 曹春婕, 董洪瑜, 李杰, 张秋奂, 王京源, 华海琴, 王志群   

  1. 北京中医药大学东方医院放射科, 北京 100078
  • 收稿日期:2018-02-27 出版日期:2018-03-21 发布日期:2018-04-14
  • 通讯作者: 王志群 E-mail:wangzhiqun@126.com

Value of multi-slice spiral CT low-dose scanning program in the argon-helium cryotherapy of lung cancer under the guidance of CT

Li Shengao, Li Qi, Cao Chunjie, Dong Hongyu, Li Jie, Zhang Qiuhuan, Wang Jingyuan, Hua Haiqin, Wang Zhiqun   

  1. Radiology Department, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing 100078, China
  • Received:2018-02-27 Online:2018-03-21 Published:2018-04-14

摘要: 目的 探讨多层螺旋CT低剂量扫描在CT引导下氩氦刀治疗肺癌时减少辐射剂量的可行性。方法 采用数字表法随机选取52例行氩氦刀手术的肺癌患者,分低剂量组(A组)和常规剂量组(B组);A组(22例)扫描方案为120 kV、自动管电流调节技术(automatic tube current modulation,ATCM)(15~60 mA),B组(30例)扫描方案为120 kV、ATCM(50~600 mA);比较两组图像质量(肺纹理、纵隔结构、肿瘤形态、冰球形态)、辐射剂量指数(CT dose index volume,CTDIvol)、肿瘤CT值、图像噪声SD值。结果 辐射剂量指数CTDIvol组间差异具有统计学意义(P<0.01),A组较B组的辐射剂量指数下降80.90%;氩氦刀治疗前后两组肿瘤的CT值、图像噪声SD值差异均无统计学意义(P>0.05)。两组间肺纹理图像评分比较,差异有统计学意义(P=0.020),B组评分优于A组;其余两组间的各项图像质量评分差异无统计学意义(P>0.05)。结论 CT引导下氩氦刀治疗肺癌时应用低剂量扫描不影响术中穿刺定位的准确性、安全性及术中术后对冷冻效果的评估,且能够有效降低患者辐射剂量。

关键词: 低剂量, 肺癌, 电子计算机断层扫描, 氩氦刀, 图像质量

Abstract: Objective To explore the feasibility of reducing radiation dose in argon-helium cryotherapy under multi-slice spiral CT guidance using low-dose scanning program. Methods Fifty-two patients with lung tumor, treated with argon-helium cryoprotective surgery, were divided into low dose group (group A) and conventional group (group B).The group A patients (22 patients) and group B (30 patients) were treated respectively by low dose scanning program with 120 kV, ATCM (15-60 mA) and 120 kV, ATCM (50-600 mA). The image quality (argon helium cryoides, the frozen ice hockey), radiation dose CTDI, image noise were observed and evaluated. Results The radiation dose index between two groups was significant difference (P<0.05). Compared with group B, the radiation dose index in group A was decreased by 80.90%. The difference of CT value and image noise between two groups has not significant difference (P > 0.05). There difference in the image quality score between group A and group B have statistically significant (P=0.020).The other score about image evaluating was not significant difference between two group (P > 0.05). Conclusion In the lung cancer under CT guidance of argon-helium cryotherapy, the low-dose scanning program not only reduced the radiation dose of patients effectively but also ensure the accuracy, safety of the treatment.

Key words: low-dose, lung cancer, computed tomography, argon-helium cryotherapy, image quality

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