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首页> 外文期刊>Medical Imaging, IEEE Transactions on >High Range Resolution Ultrasonographic Vascular Imaging Using Frequency Domain Interferometry With the Capon Method
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High Range Resolution Ultrasonographic Vascular Imaging Using Frequency Domain Interferometry With the Capon Method

机译：使用Capon方法的频域干涉法进行高分辨率高分辨超声血管成像

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摘要

For high range resolution ultrasonographic vascular imaging, we apply frequency domain interferometry with the Capon method to a single frame of in-phase and quadrature (IQ) data acquired using a commercial ultrasonographic device with a 7.5 MHz linear array probe. In order to tailor the adaptive beamforming algorithm for ultrasonography we employ four techniques: frequency averaging, whitening, radio-frequency data oversampling, and the moving average. The proposed method had a range resolution of 0.05 mm in an ideal condition, and experimentally detected the boundary couple 0.17 mm apart, where the boundary couple was indistinguishable from a single boundary utilizing a B-mode image. Further, this algorithm could depict a swine femoral artery with a range beam width of 0.054 mm and an estimation error for the vessel wall thickness of 0.009 mm, whereas using a conventional method the range beam width and estimation error were 0.182 and 0.021 mm, respectively. The proposed method requires 7.7 s on a mobile PC with a single CPU for a $1times 3~{hbox {cm}}$ region of interest. These findings indicate the potential of the proposed method for the improvement of range resolution in ultrasonography without deterioration in temporal resolution, resulting in enhanced detection of vessel stenosis.
机译：对于高范围分辨率的超声血管成像，我们使用Capon方法将频域干涉术应用于使用带有7.5 MHz线性阵列探头的商业超声设备采集的单相和正交（IQ）数据帧。为了定制用于超声检查的自适应波束形成算法，我们采用了四种技术：频率平均，白化，射频数据过采样和移动平均值。所提出的方法在理想条件下具有0.05 mm的距离分辨率，并通过实验检测到相距0.17 mm的边界偶，其中使用B型图像可以将边界偶与单个边界区分开。此外，该算法可以描绘出猪的股动脉，其射束宽度为0.054 mm，血管壁厚度的估计误差为0.009 mm，而使用常规方法，射束宽度和估计误差分别为0.182和0.021 mm 。所提出的方法在具有单个CPU的移动PC上需要7.7 s的3倍$ {hbox {cm}} $感兴趣区域。这些发现表明，所提出的方法在提高超声检查中的距离分辨率而不会降低时间分辨率的情况下具有潜力，从而可以增强对血管狭窄的检测。

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