ISSN 1004-4140
CN 11-3017/P

双层探测器光谱CT单能量成像在泪道造影中的应用研究

宁先英, 胡柳, 范文亮, 余建明, 雷子乔

宁先英, 胡柳, 范文亮, 等. 双层探测器光谱CT单能量成像在泪道造影中的应用研究[J]. CT理论与应用研究(中英文), 2024, 33(6): 677-682. DOI: 10.15953/j.ctta.2024.144.
引用本文: 宁先英, 胡柳, 范文亮, 等. 双层探测器光谱CT单能量成像在泪道造影中的应用研究[J]. CT理论与应用研究(中英文), 2024, 33(6): 677-682. DOI: 10.15953/j.ctta.2024.144.
NING X Y, HU L, FAN W L, et al. The Application Value of Monoenergetic Imaging on Dual-layer Spectral Detector Computed Tomography in Dacryocystography[J]. CT Theory and Applications, 2024, 33(6): 677-682. DOI: 10.15953/j.ctta.2024.144. (in Chinese).
Citation: NING X Y, HU L, FAN W L, et al. The Application Value of Monoenergetic Imaging on Dual-layer Spectral Detector Computed Tomography in Dacryocystography[J]. CT Theory and Applications, 2024, 33(6): 677-682. DOI: 10.15953/j.ctta.2024.144. (in Chinese).

双层探测器光谱CT单能量成像在泪道造影中的应用研究

基金项目: 北京医学奖励基金会(YXJL-2022-0665-0186)。
详细信息
    作者简介:

    宁先英: 女,华中科技大学硕士,武汉协和医院放射科主管技师,主要从事CT技术工作,E-mail:ningxianying@163.com

    通讯作者:

    雷子乔: 男,武汉协和医院放射科技师长,华中科技大学教授、博士研究生导师,主要研究方向为CT、MR、DSA技术,E-mail:leiziqiaowhuh@163.com

  • 中图分类号: R  814

The Application Value of Monoenergetic Imaging on Dual-layer Spectral Detector Computed Tomography in Dacryocystography

  • 摘要:

    目的:探讨双层探测器光谱CT单能量成像在泪道造影中的临床应用价值。方法:对临床怀疑泪道阻塞的患者行光谱CT泪道扫描,将光谱CT的各单能量keV图像的信号噪声比(SNR)和对比噪声比(CNR)做比较,对图像质量进行主观评分,并对患者泪道阻塞部位和狭窄程度与手术或内镜比对进行诊断符合率评估。结果:50 keV图像的SNR为9.76±13.44,比70~200 keV图像的SNR高,有统计学意义;50 keV图像的CNR为10.24±13.88,比70~200 keV图像的CNR高,有统计学意义。50 keV和常规图像质量主观评分分别为(5,5)和(4,5),医师间主观评分一致性良好。结论:50 keV单能量图像显著提高CT泪道造影的信噪比和对比噪声比且主观评分一致性良好。

    Abstract:

    Objective: This study aimed to explore the value of monoenergetic imaging using dual-layer spectral detector computed tomography (CT) for dacryocystography. Methods: Dacryocystography was performed in patients with clinically suspected lacrimal duct obstruction using a Philips IQon dual-layer spectral detector CT. The objective evaluation included the signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of each monoenergetic image, subjective rating of image quality, and the site and degree of lacrimal duct obstruction. Results: The SNR and CNR of 50 keV images was 9.76±13.44 and 10.24±13.88, respectively, which were significantly lower than that of 70~200 keV images. The subjective scores for 50 keV and conventional image quality were (5, 5) and (4, 5), respectively, indicating good consistency in subjective scores among radiologists. Conclusion: The SNR and CNR of CT dacryocystography increased significantly at 50 keV.

  • 图  1   50~200 keV单能量图像SNR比较的P值热图

    Figure  1.   P-value heatmap for SNR comparison of 50~200 keV monoenergetic images

    图  2   50~200 keV单能量图像CNR比较的P值热图

    Figure  2.   P-value heatmap for CNR comparison of 50~200 keV monoenergetic images

    图  3   泪道造影骨窗50~200 keV单能量图像

    注:该病例为右侧泪道置管术后,左侧泪道注射对比剂后。(a)~(i)为50~130 keV骨窗单能量图。

    Figure  3.   Dacryocystography monoenergetic images of 50~200 keV

    表  1   50~200 keV单能量图像信噪比和对比噪声比的比较$ (\bar{x}\pm s) $

    Table  1   SNR and CNR comparison of 50~200 keV monoenergetic images

    项目 能量/ keV
    50 60 70 80 90 100 110 120
    SNR 9.76±13.44 7.29±9.23 5.01±4.55 4.43±3.38 4.46±3.32 4.50±3.26 4.53±3.17 4.56±3.09
    CNR 10.24±13.88 7.68±9.43 5.37±4.75 4.83±3.63 4.92±3.60 5.02±3.56 5.11±5.11 5.21±3.42
    130 140 150 160 170 180 190 200
    SNR 4.59±3.00 4.61±2.90 4.64±2.82 4.67±2.76 4.69±2.70 4.72±2.66 4.74±2.63 4.77±2.64
    CNR 5.30±3.33 5.38±3.23 5.47±3.16 5.55±3.10 5.62±3.02 5.69±2.97 5.76±2.94 5.83±2.94
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出版历程
  • 收稿日期:  2024-07-21
  • 修回日期:  2024-08-27
  • 录用日期:  2024-08-27
  • 网络出版日期:  2024-09-03
  • 刊出日期:  2024-11-04

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