[Radiation dose and image quality of noncontrast chest CT in domestic and imported main stream manufacturers].

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  • Additional Information
    • Source:
      Publisher: Zhonghua yi xue hui Country of Publication: China NLM ID: 7511141 Publication Model: Print Cited Medium: Print ISSN: 0376-2491 (Print) Linking ISSN: 03762491 NLM ISO Abbreviation: Zhonghua Yi Xue Za Zhi Subsets: MEDLINE
    • Publication Information:
      Publication: Beijing : Zhonghua yi xue hui
      Original Publication: Beijing : Zhonghua yi xue hui.
    • Subject Terms:
    • Abstract:
      Objective: To compare the radiation dose and image quality of noncontrast chest CT and detection of ground-glass opacity pulmonary nodules (GGN) in domestic 128-slice spiral CT with the other CT scanners from three main stream manufacturers. Methods: From May 8, 2018 to October 31, 2018, noncontrast chest CT images from Neusoft 128-slice CT (75 males, 25 females, (42±16) years), dual-source 64-slice CT (53 males, 47 females, (50±16) years) and dual-source 128-slice CT scanners(69 males, 31 females, (62±17) years), Toshiba 128-slice CT (51 males, 49 females, (58±13) years) and GE 128-slice CT scanner (55 males, 45 females, (60±10) years) were collected in Eastern Theater Command and Tianjin People's Hospital. Radiation dose and image quality were evaluated.GGN detected both in Neusoft CT and dual-source CT scanners were used to analyze the displaying ability of lesions. Results: The noise in lung window of Neusoft CT ((37.8±4.9) HU) was higher than that of other mainstream CT scanners, and the noise in mediastinal window ((8.4±1.9) HU) was lower than that of GE 128-slice CT ((9.8±3.2) HU), but higher than that of dual-source CT and Toshiba 128-slice CT ((6.9±3.5)HU) ( P <0.05). The absolute value of lung SNR in Neusoft CT was lower than that of other mainstream CT scanners, and the SNR in aorta (4.6±1.3) was lower than those of dual-source CT and Toshiba 128-slice CT(6.8±2.2) ( P< 0.05), but was not statistically significant compared with GE 128-slice CT (5.0±1.7). The mean CT value of upper lung ((-863±31) HU) at Neusoft CT was higher than 128-row dual-source CT ((-869±35) HU), and the mean CT value of aorta ((37±7) HU) was lower than that of Toshiba 128-slice CT((42±7) HU) and GE 128-slice CT ((45±9) HU) ( P <0.05), while the mean CT values of the remaining lung and aorta were not statistically significant ( P >0.05). The two readers had good to excellent consistency for image quality in five scanners (the highest kappa value=0.984). The delineation ability of Neusoft CT for GGN boundary was lower than that of dual-source CT ( P <0.05), but had similar abilities to display the solid components, lobulation, burring, vacuoles, vascular bundle sign and pleural depression sign of GGN (all P >0.05). Radiation dose of Neusoft CT was lower than Toshiba 128-slice CT, but higher than dual-source 64-sliceCT and GE 128-slice CT scanners ( P <0.05). Conclusions: With lower radiation dose than Toshiba 128-slice CT, Neusoft CT chest examination can meet the requirements of clinical diagnosis, but higher radiation dose and the lower image quality than dual-source CT and GE 128-slice CT shown in this study indicate further improvement is needed in terms of software and hardware.
    • Grant Information:
      2017YFC0113400 The National Key Research and Development Program of China
    • Contributed Indexing:
      Keywords: Image quality; Radiation dosage; Solitary pulmonary nodule; Tomography, X-ray
      Local Abstract: [Publisher, Chinese] 目的: 分析东软128层螺旋CT(以下简称东软CT)与其他3种主流CT设备胸部平扫的图像质量、辐射剂量及评估肺磨玻璃结节(GGN)的性能。 方法: 回顾性分析东部战区总医院2018年5月8日至10月31日东软128层CT[男75例、女25例,年龄(42±16)岁]、西门子双源64层CT[男53例、女47例,年龄(50±16)岁]和双源128层CT[男69例、女31例,年龄(62±17)岁]及天津市人民医院东芝128层CT[男51例、女49例,年龄(58±13)岁]和GE 128层CT[男55例、女45例,年龄(60±10)岁]胸部平扫图像各100例。进行客观和主观图像质量评估,记录辐射剂量参数。选取同时在东软CT和双源CT检测到的GGN,分析对GGN细节的显示能力。 结果: 东软CT的肺窗噪声[(37.8±4.9)HU]高于主流CT,纵隔窗噪声[(8.4±1.9)HU]低于GE 128层CT[(9.8±3.2)HU],高于双源CT和东芝128层CT[(6.9±3.5)HU](均 P <0.05)。东软CT的肺信号噪声比(SNR)绝对值低于主流CT(均 P <0.05),主动脉SNR(4.6±1.3)低于双源CT和东芝128层CT(6.8±2.2)( P <0.05),但与GE 128层CT(5.0±1.7)比较差异无统计学意义。东软CT的上肺平均分[(-863±31)HU]高于双源128层CT[(-869±35)HU],主动脉平均分[(37±7)HU]低于东芝128层CT[(42±7)HU]和GE 128层CT[(45±9)HU](均 P <0.05),余肺和主动脉平均分比较差异无统计学意义。两名评分者对图像质量的评估均具有较高的一致性(最高 kappa 值0.984)。东软CT对GGN边界的勾画能力次于双源CT( P <0.05),但对GGN的实性成分、分叶、毛刺、空泡、血管集束征及胸膜凹陷征的显示能力相当( P >0.05)。东软CT辐射剂量低于东芝128层CT,高于双源64层CT和GE 128层CT(均 P <0.05)。 结论: 东软CT胸部平扫能满足临床诊断要求,其辐射剂量明显低于东芝128层CT,但高于双源CT和GE 128层CT,图像质量低,因此还需要从软硬件上进一步改善。.
    • Publication Date:
      Date Created: 20200422 Date Completed: 20200601 Latest Revision: 20200601
    • Publication Date:
      20231215
    • Accession Number:
      10.3760/cma.j.cn112137-20190903-01957
    • Accession Number:
      32311878