High Range Resolution Ultrasonographic Vascular Imaging Using Frequency Domain Interferometry with the Capon Method
High Range Resolution Ultrasonographic Vascular Imaging Using Frequency Domain Interferometry with the Capon Method
复制标题
使用频域干涉测量法和 Capon 方法进行高范围分辨率超声血管成像
DOI：
10.1109/tmi.2011.2170847
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
T.Sato
中科院分区：
文献类型：
--
作者：
H.Taki;K.Taki;T.Sakamoto;M.Yamakawa;T.Shi ina;M.Kudo;T.Sato
对于高范围分辨率的超声血管成像，我们应用频域干涉与Capon方法的单帧的同相和正交（IQ）数据采集使用商业超声设备与7.5 MHz的线性阵列探头。为了定制超声检查的自适应波束形成算法，我们采用四种技术：频率平均，白化，射频数据过采样，和移动平均。所提出的方法在理想条件下具有0.05 mm的范围分辨率，并且实验检测到相距0.17 mm的边界耦合，其中边界耦合与利用B模式图像的单个边界不可区分。此外，该算法可以用0.054 mm的范围波束宽度和0.009 mm的血管壁厚度的估计误差描绘猪股动脉，而使用常规方法，范围波束宽度和估计误差分别为0.182和0.021 mm。该方法需要7.7 s的移动的PC与一个单一的CPU为1 × 3 cm的感兴趣区域。这些研究结果表明，所提出的方法的潜力，在超声检查的范围分辨率的改善，而不会恶化的时间分辨率，从而提高检测血管狭窄。
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 1 × 3 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.