标题：面神经管64排螺旋CT低剂量扫描的临床应用

      作者：王伟，罗敏，李敏龙，谢刚，钱勇
    (自贡市第四人民医院放射科，四川 自贡 643000)

      卷次： 2016年27卷10期

      【摘要】 目的 探讨面神经管64排螺旋CT低剂量扫描临床应用的可行性。方法 收集2015年3~9月临床
怀疑颞骨、鼻副窦病变行64排螺旋CT且无面神经疾病患者88例，采用随机单盲法分成常规剂量组(A组)和三组不
同扫描参数的低剂量组(B-D组)，每组22例。常规剂量组使用参数为120 kV/240 mA，低剂量组的扫描参数分别为
B组(100 kV/240 mA)、C组(100 kV/120 mA)、D组(100 kV/80 mA)。采集图像由2名放射诊断主治医师及以上人员
共同进行分析，包括图像质量评分、记录图像噪声和辐射剂量。图像质量评分的统计分析使用 Kruskal-Wallis H秩
和检验，噪声分析使用单因素方差分析。结果 A、B、C、D四组的图像质量评分分别为20.0分(19.5，20.0)、19.5分
(19.5，20.0)、19.5分 (19.5，20.0)和 19.5分 (19.5，20.0)，CT值分别为 (2 258.43±90.65) Hu、(2 289.00±43.89) Hu、
(2 298.82±46.86) Hu、(2 299.89±48.05) Hu，四组比较差异均无统计学意义(P>0.05)，图像能够满足诊断要求；B、C、D
三组CT剂量指数、有效剂量E与常规剂量组比较均有不同程度的降低，以D组分别下降79.3%、79.2%最为显著，患
者接受的辐射剂量明显降低。结论 100 kV/80 mA可作为64排螺旋CT面神经管低剂量扫描优化参数阈值。

      【关键词】 面神经管；低剂量扫描；64排螺旋CT；图像质量

      【中图分类号】 R445 【文献标识码】 A 【文章编号】 1003—6350（2016）10—1567—03


Clinical application of low-dose scan solution in 64-slice spiral computed tomography of the facial canal.
WANG
Wei, LUO Min, LI Min-long, XIE Gang, QIAN Yong. Department of Radiology, the Fourth People's Hospital of Zigong,
Zigong 643000, Sichuan CHINA

【Abstract】 Objective To explore the clinical feasibility of low dose scan solution in 64-slice spiral computed
tomography of the facial canal. Methods From March 2015 to September 2015, a total of 88 patients suspected of
temporal bone and paranasal sinus lesions, who had no facial nerve disease and underwent 64-slice spiral CT scan, were
randomly divided into routine dose group (A group, 120 kV/240 mA) and 3 different scan parameters of low-dose groups
[B group (100 kV/240 mA), C group (100 kV/120 mA), D group (100 kV/80 mA)], with 22 cases in each group. The col-
lected images were evaluated by at least 2 diagnostic radiology doctors in terms of image quality score, recording im-
age noise and radiation dose. Image quality score and image noise were analyzed respectively by Kruskal-Wallis H
test and one-way ANVOA. Results The image quality scores of A, B, C, D groups were respectively 20.0 points
(19.5, 20.0), 19.5 points (19.5, 20.0), 19.5 points (19.5, 20.0), 19.5 points (19.5, 20.0); The CT values were respectively
(2 258.43±90.65) Hu, (2 289.00±43.89) Hu, (2 298.82±46.86) Hu, (2 299.89±48.05) Hu. There were no statistically signifi-
cant differences in our groups in term of image quality scores and CT values (P>0.05). The images of the four groups all can
satisfy the diagnostic requirements. Compared with routine dose group, the CT dose index and the effect dose E in B, C, D
groups had different degrees of reduction, among which D group had the most significant decreases by 79.3% and
79.2%, respectively. The received radiation dose of patients was significantly reduced. Conclusion The scanning condition
of 100 kV/80 mA can be used as a facial canal low-dose scan threshold optimization parameter in 64-slice spiral CT.

      【Key words】 Facial canal; Low-dose scan; 64-slice spiral computed tomography; Image quality
·论 著·
6350.2016.10.006