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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Comparison Between Multiline Transmission and Diverging Wave Imaging: Assessment of Image Quality and Motion Estimation Accuracy
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Comparison Between Multiline Transmission and Diverging Wave Imaging: Assessment of Image Quality and Motion Estimation Accuracy

机译：多线传输和发散波成像之间的比较：图像质量和运动估计精度的评估

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摘要

High frame rate imaging is particularly important in echocardiography for better assessment of the cardiac function. Several studies showed that diverging wave imaging (DWI) and multiline transmission (MLT) are promising methods for achieving a high temporal resolution. The aim of this study was to compare MLT and compounded motion compensation (MoCo) DWI for the same transmitted power, same frame rates [image quality and speckle tracking echocardiography (STE) assessment], and same packet size [tissue Doppler imaging (TDI) assessment]. Our results on static images showed that MLT outperforms DW in terms of resolution (by 30% on average). However, in terms of contrast, MLT outperforms DW only for the depth of 11 cm (by 40% on average), the result being reversed at a depth of 4 cm (by 27% on average). In vitro results on a spinning phantom at nine different velocities showed that similar STE axial errors (up to 2.3% difference in median errors and up to 2.1% difference in the interquartile ranges) are obtained with both ultrafast methods. On the other hand, the median lateral STE estimates were up to 13% more accurate with DW than with MLT. On the contrary, the accuracy of TDI was only up to similar to 3% better with MLT, but the achievable DW Doppler frame rate was up to 20 times higher. However, our overall results showed that the choice of one method relative to the other is therefore dependent on the application. More precisely, in terms of image quality, DW is more suitable for imaging structures at low depths, while MLT can provide an improved image quality at the focal point that can be placed at higher depths. In terms of motion estimation, DW is more suitable for color Doppler-related applications, while MLT could be used to estimate velocities along selected lines of the image.
机译：高帧频成像在超声心动图检查中对于更好地评估心脏功能特别重要。多项研究表明，发散波成像（DWI）和多线传输（MLT）是实现高时间分辨率的有前途的方法。这项研究的目的是比较MLT和复合运动补偿（MoCo）DWI在相同的发射功率，相同的帧频[图像质量和斑点跟踪超声心动图（STE）评估]和相同的数据包大小[组织多普勒成像（TDI）评定]。我们在静态图像上的结果表明，在分辨率方面，MLT优于DW（平均30％）。但是，就对比度而言，MLT仅在11 cm的深度（平均40％）上优于DW，结果在4 cm的深度（平均27％）上相反。两种不同的超快方法在旋转的幻象上以九种不同速度进行的体外结果表明，相似的STE轴向误差（中值误差差异最大2.3％，四分位间距差异最大2.1％）。另一方面，DW的横向STE估计中值比MLT的准确率高13％。相反，使用MLT时，TDI的精度仅高出约3％，但可实现的DW多普勒帧速率却高出20倍。但是，我们的总体结果表明，因此选择一种方法相对于另一种方法取决于应用程序。更准确地说，就图像质量而言，DW更适合于低深度的成像结构，而MLT可以在可以放置在较高深度的焦点处提供改进的图像质量。在运动估计方面，DW更适合与彩色多普勒相关的应用，而MLT可用于估计沿图像选定线的速度。

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