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工业CT系统密度分辨率的影响因素

郭智敏, 齐子诚, 乔日东, 倪培君

郭智敏, 齐子诚, 乔日东, 倪培君. 工业CT系统密度分辨率的影响因素[J]. 无损检测, 2010, 32(11): 898-902.
引用本文: 郭智敏, 齐子诚, 乔日东, 倪培君. 工业CT系统密度分辨率的影响因素[J]. 无损检测, 2010, 32(11): 898-902.
GUO Zhi-Min, QI Zi-Cheng, QIAO Ri-Dong, NI Pei-Jun. The Influencing Factors in Industrial CT Density Resolution[J]. Nondestructive Testing, 2010, 32(11): 898-902.
Citation: GUO Zhi-Min, QI Zi-Cheng, QIAO Ri-Dong, NI Pei-Jun. The Influencing Factors in Industrial CT Density Resolution[J]. Nondestructive Testing, 2010, 32(11): 898-902.

工业CT系统密度分辨率的影响因素

详细信息
    作者简介:

    郭智敏(1982-), 男, 硕士研究生, 主要从事工业CT检测技术研究。

  • 中图分类号: TG115.28

The Influencing Factors in Industrial CT Density Resolution

  • 摘要: 密度分辨率是CT系统性能的重要参数, 噪声级别影响着CT系统的密度分辨率并与之存在弱正相关性, 而电压、电流和重建范围等工艺因素直接影响CT系统的量子噪声。采用圆盘法来研究不同工艺因素对工业CT系统密度分辨率的影响。在此基础上, 探讨在相同功率下, 使用工业CT系统测试不同材料(铝合金、钛合金或有机玻璃)时达到最佳密度分辨率时的扫描参数。
    Abstract: Density resolution is an important parameter of CT system. Noise and density resolution were found to have a statistically significant positive correlation. To research the relationship between the scanning parameters(tube voltage, tube current, field of reconstruction and so on, which had significant influences on noise level) and density resolution, the disc phantom method was introduced and applied in the practical testing of an industrial X-ray CT under certain acquisition conditions. Then the results were demonstrated and discussed. At last, this paper discussed the parameters of the best density resolution under the same power.
  • [1] Hye Jung Park, Seung Eun Jung, Young Joon Lee, et al. The relationship between subjective and objective parameters in CT phantom image evaluation[J]. Korean J Radiol, 2009, 10(5): 490.
    [2] 张朝宗, 郭志平, 张朋, 等.工业CT技术和原理[M].北京: 科学出版社, 2009: 51-67.
    [3] ASTM E 1695—1995 Standard Test Method for Measurement of CT System Performance[S].
    [4] Chao EH, Toth TL, Bromberg NB. A statistical method of defining low contrast detectability[J]. Radiology, 2000, 217(Suppl S): 162.
    [5] GJB 5311—2004 工业射线层析成像(CT)检测[S].
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出版历程
  • 收稿日期:  2009-10-29
  • 刊出日期:  2010-11-09

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