Department of Biomedical Engineering, Hefei University of Technology, Hefei, China.
Biomedical Engineering, Anhui Medical University, Hefei, China.
Technol Health Care. 2024;32(6):3967-3984. doi: 10.3233/THC-231452.
Ultrasound imaging has been widely used in clinical examination because of portability, safety, and low cost. However, there are still some main challenges of imaging quality that remain in conventional ultrasound systems.
Improving image quality of SA-based methods using an improved imaging mode named far-focus compound (FSC) imaging.
A far-focus compound (FSC) imaging based on full-aperture transmission and full-aperture reception is proposed in this paper. In transmission, it uses the full aperture to transmit the focused beam to ensure image resolution and emission of sound field energy. In reception, the full aperture is used to receive the reflected beam to ensure the image quality. A lag-one coherence-based zero-cross factor (LOCZF) is then implemented in FSC for improvement of contrast ratio (CR). The LOCZF uses lag-one coherence as zero-cross factorâs adaptive coefficient. Comparisons were made with several other weighting techniques by performing simulations and experiments for performance evaluation.
Results confirm that LOCZF applied to FSC offers a good image contrast and simultaneously the speckle pattern. For simulated cysts, CR improvement of LOCZF reaches 194.1%. For experimental cysts, CR improvement of LOCZF reaches 220%. From the in-vivo result, compared with FSC, CR improvement of LOCZF reaches 112.7%.
Proved gCNR performance. In addition, the LOCZF method shows good performance in experiments. The proposed method can be used as an effective weighting technique for improvement of image quality in ultrasound imaging.
由于便携性、安全性和低成本，超声成象已广泛应用于临床检查。然而，传统超声系统仍然存在一些成像质量的主要挑战。
使用名为远焦复合（FSC）成象的改进成象模式来提高基于 SA 的方法的图象质量。
本文提出了一种基于全孔径发射和全孔径接收的远焦复合（FSC）成象。在发射中，它使用全孔径来发射聚焦光束，以确保图象分辨率和发射声场能量。在接收中，使用全孔径接收反射光束，以确保图象质量。然后在 FSC 中实现基于滞后一相干的零交叉因子（LOCZF）以提高对比度比（CR）。LOCZF 使用滞后一相干作为零交叉因子的自适应系数。通过模拟和实验进行性能评估，对几种其它加权技术进行了比较。
结果证实，LOCZF 应用于 FSC 可提供良好的图象对比度和同时的斑点模式。对于模拟的囊肿，LOCZF 的 CR 提高了 194.1%。对于实验囊肿，LOCZF 的 CR 提高了 220%。从体内结果来看，与 FSC 相比，LOCZF 的 CR 提高了 112.7%。
证明了 gCNR 的性能。此外，LOCZF 方法在实验中表现出良好的性能。该方法可作为一种有效的加权技术，用于提高超声成象的图象质量。
