摘要
目的 探讨自动管电流技术联合迭代算法在颈部CT扫描中的应用价值。方法 连续收集行颈部CT扫描（平扫＋增强）的患者80例，按随机数表法分为实验组和对照组，各40例。实验组平扫、增强均采用自动管电流技术＋迭代算法重建，对照组平扫、增强均采用固定管电流200 mAs＋滤波反投影法重建。对两组平扫、增强图像均进行主观评分、客观评价[甲状腺、斜方肌、胸锁乳突肌、颌下腺、翼外肌、脑组织的噪声值（SD）]。比较两组的有效剂量（E）。结果 实验组平扫、增强的E均低于对照组，差异有统计学意义（t=-2.451、-2.451，P〈0.05）。实验组平扫、增强图像主观评分均高于对照组，差异有统计学意义（Z=-1.969、-2.056，P〈0.05）；实验组平扫、增强图像甲状腺、斜方肌、胸锁乳突肌、颌下腺的SD均低于对照组，差异有统计学意义（t=2.400、2.516、2.120、2.411、4.134、4.674、2.711、2.892，P〈0.05）。两组平扫、增强图像翼外肌、脑组织的SD差异均无统计学意义（P〉0.05）。结论 自动管电流技术联合迭代算法在颈部CT扫描中，在提高图像质量的同时，可有效降低辐射剂量。
Objective To explore application of automatic tube current modulation combined with iterative reconstruction in CT scanning （non-enhanced and enhanced） of neck. Methods A total of 80 patients with CT scanning of neck were randomly divided into test group（n=40, automatic tube current modulation,iterative reconstruction） and control group（n=40,200 mAs, filtered-back-projection reconstruction）. Subjective scores and objective evaluation of two groups were evaluated. Evaluation included image noise（SD） of thyroid gland, trapezius muscle, sternocleidomastoid muscle, submandibular gland, lateral pterygoid muscle and brain tissue. Effective dose （E） was compared. Results The E of non-enhanced and enhanced scanning in test group was lower than that of control group with the statistically significant difference（t=-2.451, -2.451, P〈0.05）. The subjective scores of non-enhanced and enhanced scanning in test group were higher than those of control group with the statistically significant difference （Z=-1.969, -2.056, P〈0.05）, while SD of thyroid gland, trapezius muscle, sternocleidomastoid muscle, submandibular gland in test group were lower than that of control group with the statistically significant difference（t=2.400,2.516,2.120,2.411,4.134,4.674,2.711,2.892, P〈0.05）. There were no significant differences in SD of lateral pterygoid muscle, brain tissue of non-enhanced and enhanced scanning between two groups （P〉0.05）. Conclusions Automatic tube current modulation combined with iterative reconstruction in CT scanning of neck could improve image quality, and reduce effectively radiation dose.
作者
胡仕北
何长久
青浩渺
刘舫
李海烈
夏谦
李德珊
周鹏
Hu Shibei;He Changfiu;Qing Haomiao;Liu Fang;Li Hailie;Xia Qian;Li Deshan;Zhou Peng(Sichuan Cancer Hospital ＆ Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610041, China)
出处
《中华放射医学与防护杂志》
CAS
CSCD
北大核心
2017年第11期875-879,共5页
Chinese Journal of Radiological Medicine and Protection
基金
四川省科技计划项目（2017JY0080）
关键词
颈部
辐射剂量
迭代重建
自动管电流技术
Neck
Radiation dosage
Iterative reconstruction
ATCM technique
