基于改进Otsu方法和自适应风驱动优化的颈总动脉超声图像内膜-中膜厚度全自动测量

IF 2.5 4区 医学 Q1 ACOUSTICS
Ultrasonic Imaging Pub Date : 2020-11-01 Epub Date: 2020-09-18 DOI:10.1177/0161734620956897
Kun Wang, Yuanyuan Pu, Yufeng Zhang, Pei Wang
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引用次数: 5

摘要

颈总动脉内膜中膜厚度(IMT)可用于预测动脉粥样硬化的发生风险。许多图像分割技术已被用于IMT测量。然而,超声图像中严重的噪声会导致错误的分割结果。为了提高对噪声的鲁棒性,提出了一种基于改进的Otsu方法和自适应风力优化技术的自动估计IMT的方法(记为“改进的Otsu- awdo”)。首先,采用一种先进的去斑滤波器,即“Nagare滤波器”来处理颈动脉超声图像中的斑点噪声。接下来,采用改进的模糊对比法(IFC)增强模糊滤光图像中的中膜复合体(IMC)区域。在此基础上,提出了一种自动提取感兴趣区域的方法。最后,利用改进的Otsu-AWDO对内膜腔内膜界面和中膜外膜界面进行分割。然后,使用6个不同数据集的156张b型颈动脉纵向超声图像来评估自动测量的性能。结果表明,该方法的绝对误差仅为10.1±9.6(平均±std单位μm)。此外,该方法的相关系数高达0.9922,偏差低至0.0007。通过与已有方法的比较,本文方法具有较强的鲁棒性,能够提供准确的IMT估计。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fully Automatic Measurement of Intima-Media Thickness in Ultrasound Images of the Common Carotid Artery Based on Improved Otsu's Method and Adaptive Wind Driven Optimization.

The intima media thickness (IMT) of the common carotid artery (CCA) can be used to predict the risk of atherosclerosis. Many image segmentation techniques have been used for IMT measurement. However, severe noise in the ultrasound image can lead to erroneous segmentation results. To improve the robustness to noise, a fully automatic method, based on an improved Otsu's method and an adaptive wind-driven optimization technique, is proposed for estimating the IMT (denoted as "improved Otsu-AWDO"). First, an advanced despeckling filter, i.e., " Nagare's filter" is used to address the speckle noise in the carotid ultrasound images. Next, an improved fuzzy contrast method (IFC) is used to enhance the region of the intima media complex (IMC) in the blurred filtered images. Then, a new method is used for automatic extraction of the region of interest (ROI). Finally, the lumen intima interface and media adventitia interface are segmented from the IMC using improved Otsu-AWDO. Then, 156 B-mode longitudinal carotid ultrasound images of six different datasets are used to evaluate the performance of the automatic measurements. The results indicate that the absolute error of proposed method is only 10.1 ± 9.6 (mean ± std in μm). Moreover, the proposed method has a correlation coefficient as high as 0.9922, and a bias as low as 0.0007. From comparison with previous methods, we can conclude that the proposed method has strong robustness and can provide accurate IMT estimations.

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来源期刊
Ultrasonic Imaging
Ultrasonic Imaging 医学-工程:生物医学
CiteScore
5.10
自引率
8.70%
发文量
15
审稿时长
>12 weeks
期刊介绍: Ultrasonic Imaging provides rapid publication for original and exceptional papers concerned with the development and application of ultrasonic-imaging technology. Ultrasonic Imaging publishes articles in the following areas: theoretical and experimental aspects of advanced methods and instrumentation for imaging
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