[1]时飞跃,柏正璐,秦航,等.西门子CT模拟机图像均匀性的长期稳定性分析[J].中国医学物理学杂志,2018,35(9):1035-1038.[doi:10.3969/j.issn.1005-202X.2018.09.008]
　SHI Feiyue,BAI Zhenglu,QIN Hang,et al.Long-term stability of image uniformity for a SIEMENS CT simulator[J].Chinese Journal of Medical Physics,2018,35(9):1035-1038.[doi:10.3969/j.issn.1005-202X.2018.09.008]
点击复制

西门子CT模拟机图像均匀性的长期稳定性分析()
分享到：

《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]

卷:
35卷
期数:
2018年第9期
页码:
1035-1038
栏目:
医学影像物理
出版日期:
2018-09-27

文章信息/Info

Title:
Long-term stability of image uniformity for a SIEMENS CT simulator
文章编号:
1005-202X（2018）09-1035-04
作者:
时飞跃1; 柏正璐2; 秦航2; 秦伟1; 林强2
1. 南京医科大学附属南京医院（南京市第一医院）肿瘤放疗中心，江苏南京210006；2. 南京医科大学附属南京医院（南京市第一 医院）医疗设备处，江苏南京210006
Author(s):
SHI Feiyue1;  BAI Zhenglu2;  QIN Hang2;  QINWei1;  LIN Qiang2
1. Radiation Therapy Center, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, China; 2. Department of Medical Equipment, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, China
关键词:
CT模拟机; 图像均匀性; 管电压; 长期稳定性
Keywords:
Keywords: CT simulator;  image uniformity;  tube voltage;  long-term stability
分类号:
R811.1
DOI:
10.3969/j.issn.1005-202X.2018.09.008
文献标志码:
A
摘要:
目的：分析使用水模体进行日常质量检测的数据，评价西门子Sensation Open CT模拟机图像均匀性的长期稳定 性。方法：使用水模体，调用日常质量检测程序Daily Quality Check，每月检测西门子Sensation Open CT模拟机，得到标 称管电压120 kV和140 kV两种情形的CT图像，通过手动勾画和计算得到图像均匀性的数据。对2017年3月~2018年2 月的CT图像均匀性数据进行统计学分析和比较研究。结果：在120 kV情形下，第1至第6层（层厚4.8 mm）图像均匀性 值分别为：（2.5±0.4）、（2.8±0.6）、（2.2±0.2）、（1.5±0.7）、（1.4±0.4）和（1.0±0.3）HU；在140 kV情形下，第1至第6层图像均匀 性值分别为：（2.0±0.2）、（3.0±0.4）、（1.5±0.5）、（0.7±0.4）、（0.5±0.2）和（0.7±0.5）HU。该CT模拟机的图像均匀性在这12个 月内的变化很小，所有值均在0～4 HU内。结论：在12 个月内，该西门子CT模拟机图像均匀性比较稳定，满足使用要 求。层面位置是影响图像均匀性的因素之一。
Abstract:
Abstract: Objective To analyze the data from routine quality assurance (QA) measurement using water phantom and assess the long-term stability of image uniformity for a SIEMENS Sensation Open CT simulator. Methods The SIEMENS Sensation Open CT simulator was tested monthly using a water phantom and Daily Quality Check program. The CT images under the nominal tube voltages of 120 and 140 kV were obtained. Then the values of image uniformity were obtained by manual delineation and calculation. Finally, statistical analysis and comparative study were conducted on the test data obtained between March 2017 and February 2018. Results Under the nominal tube voltage of 120 kV, the values of image uniformity for the first to sixth slices, with a slice thickness of 4.8 mm, were (2.5±0.4), (2.8±0.6), (2.2±0.2), (1.5±0.7), (1.4±0.4) and (1.0±0.3) HU, respectively; and under the nominal tube voltage of 140 kV, the corresponding values were (2.0±0.2), (3.0±0.4), (1.5±0.5), (0.7±0.4), (0.5± 0.2) and (0.7±0.5) HU, respectively. In the 12 months, all the values of image uniformity were within 4 HU and only had little changes. Conclusion In a time period of 12 months, the image uniformity for SIEMENS CT simulator is relatively stable and meets the requirements for application. The slice position is one of the factors affecting the image uniformity.

相似文献/References:

[1]时飞跃,柏正璐,秦伟. 西门子CT模拟机水的CT值、图像噪声和管电压长期稳定性分析[J].中国医学物理学杂志,2017,34(12):1232.[doi:DOI:10.3969/j.issn.1005-202X.2017.12.008]
　SHI Feiyue,BAI Zhenglu,QIN Wei. Long-term stability of CT number of water, image noise and tube voltage for a SIEMENS CT-simulator[J].Chinese Journal of Medical Physics,2017,34(9):1232.[doi:DOI:10.3969/j.issn.1005-202X.2017.12.008]
[2]时飞跃,秦伟,陈飞,等.呼吸时相和模体位置对4D-CT图像均匀性的影响[J].中国医学物理学杂志,2020,37(1):65.[doi:DOI:10.3969/j.issn.1005-202X.2020.01.013]
　SHI Feiyue,QIN Wei,et al.Effects of respiratory phase and phantom position on uniformity of 4D-CT image[J].Chinese Journal of Medical Physics,2020,37(9):65.[doi:DOI:10.3969/j.issn.1005-202X.2020.01.013]
[3]时飞跃,王敏,秦伟,等.DoseLab软件检测CT图像噪声的程序改进及应用分析[J].中国医学物理学杂志,2021,38(3):327.[doi:DOI:10.3969/j.issn.1005-202X.2021.03.011]
　SHI Feiyue,WANG Min,QIN Wei,et al.Improvement of DoseLab software program for CT image noise measurement and its application[J].Chinese Journal of Medical Physics,2021,38(9):327.[doi:DOI:10.3969/j.issn.1005-202X.2021.03.011]

备注/Memo

备注/Memo:
【收稿日期】2018-04-02 【基金项目】国家自然科学基金青年科学基金（81603674）；江苏省自 然科学基金青年基金（BK20161049） 【作者简介】时飞跃，博士，助理研究员，研究方向：肿瘤放射物理，Email: shifeiyue2013@126.com 【通信作者】秦航，高级工程师，研究方向：医疗设备的质量控制与管 理，E-mail: 18951670885@189.cn
更新日期/Last Update: 2018-09-28