[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):1232-1235.[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(12):1232-1235.[doi:DOI:10.3969/j.issn.1005-202X.2017.12.008]
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 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()
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《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]

卷:
34卷
期数:
2017年第12期
页码:
1232-1235
栏目:
医学影像物理
出版日期:
2017-12-20

文章信息/Info

Title:
 Long-term stability of CT number of water, image noise and tube voltage for a SIEMENS CT-simulator
文章编号:
1005-202X(2017)12-1232-04
作者:
 时飞跃1柏正璐2秦伟1
 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 Wei1
 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模拟机水的CT值图像噪声管电压长期稳定性
Keywords:
 Keywords: CT-simulator CT number of water image noise tube voltage long-term stability
分类号:
R811.1
DOI:
DOI:10.3969/j.issn.1005-202X.2017.12.008
文献标志码:
A
摘要:
 【摘 要】 目的:分析使用水模体进行日常质量检测得到的数据,评价西门子Sensation Open CT模拟机水的CT值、图像噪声和管电压的长期稳定性。 方法:使用水模体,调用日常质量检测程序,每月检测西门子Sensation Open CT模拟机,得到标称管电压120和140 kV两种情形水的CT值、图像噪声和管电压的检测数据。对2013年7月~2016年4月共34个月的检测数据进行统计分析。 结果:120 kV情形:第1~6层(层厚4.8 mm)水的CT值分别为:(0.05±0.47)、(0.75±0.36)、(0.08±0.50)、(-1.21±0.46)、(-0.53±0.45)、(-0.62±0.45) HU。140 kV情形:第1~6层水的CT值分别为:(0.07±0.50)、(1.01±0.42)、(0.11±0.41)、(-1.36±0.51)、(-1.24±0.38)、(-1.01±0.45) HU。120和140 kV两种情形的图像噪声分别为(10.32±0.05)、(9.42±0.06) HU。标称管电压120 kV情形,检测到管电压值119.8 kV 28次,120.0 kV 6次;标称管电压140 kV情形,检测到管电压值139.8 kV 18次,139.6 kV 16次。 结论:由统计数据可见,在34个月中,该西门子CT模拟机水的CT值、图像噪声和管电压比较稳定,满足使用要求。
Abstract:
 Abstract: Objective To evaluate the long-term stability of the CT number of water, image noise and tube voltage for a SIEMENS Sensation Open CT-simulator by analyzing the data from routine quality assurance measurements using water phantom. Methods SIEMENS Sensation Open CT-simulator was tested monthly by a water phantom and routine quality assurance program. We obtained the CT number of water, image noise and tube voltage when the nominal tube voltages was 120 or 140 kV. Statistical analysis was conducted on the test data of 34 months from July 2013 to April 2016. Results At the nominal tube voltages of 120 kV, the CT number of water for the first to the sixed slice (slice thickness: 4.8 mm) were (0.05±0.47), (0.75±0.36), (0.08±0.50), (-1.21±0.46), (-0.53±0.45) and (-0.62±0.45) HU, respectively; and at 140 kV, the corresponding CT number of water for six slices were (0.07±0.50), (1.01±0.42), (0.11±0.41), (-1.36±0.51), (-1.24±0.38) and (-1.01 ±0.45) HU, respectively. The image noises at the nominal tube voltages of 120 and 140 kV were (10.32±0.05) and (9.42±0.06) HU. When the nominal tube voltage was 120 kV, we detected 28 times of 119.8 kV (tube voltage) and 6 times of 120.0 kV; when the nominal tube voltage was 140 kV, we detected 18 times of 139.8 kV and 16 times of 139.6 kV. Conclusion The statistical data shows that in the 34 months, the CT number of water, image noise and tube voltage for SIEMENS CT-simulator are stable and meet the operating requirements.

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备注/Memo

备注/Memo:
 【收稿日期】2017-09-25
【基金项目】江苏省高校自然科学研究面上项目(15KJB360004)
【作者简介】时飞跃,研究方向:肿瘤放射物理,E-mail: shifeiyue2013@126.com
更新日期/Last Update: 2017-12-21