超声局部智能特征增强方法的研究

      HD Scope+: Research on Local Enhancement of Ultrasound Imaging

      • 摘要: 在超声成像过程中,发射策略、自适应波束形成方法以及图像后处理链路的优化,能够有效改善图像分辨率和对比度。然而,这些技术的直接融合不可避免地带来了资源消耗增加,导致超声实时成像性能急剧降低。因此,超声诊断的实时性和图像质量面临无法兼顾的难题。针对以上问题,本研究提出一种能够在保证不损失成像实时性的前提下改善局部图像质量的成像方法。该方法能够综合考虑不同成像场景的需求,在局部区域针对性地设计一组或多组信号处理链路,从而实现噪声抑制、细节增强等智能特征增强功能。体模测试结果表明,睿瞳模式的噪声抑制功能在对比度(CR)、对比度噪声比(CNR)和广义对比度噪声比(gCNR)方面相比于常规B模式图像的平均提升了59.05%、0.63dB以及0.0207。睿瞳模式下的细节增强功能在半峰全宽(FWHM)指标方面最大提升了77.12%。人体血管瘤和胰腺囊肿诊断结果表明,睿瞳模式能够提供更丰富的局部图像特征,从而辅助提高超声诊断的准确性。

         

        Abstract: In the process of ultrasound imaging, optimizing the transmit sequence strategy, adaptive beamforming algorithms, and image post-processing can significantly improve spatial resolution and tissue contrast. However, the direct integration of these advanced techniques invariably escalates the consumption of computational resource, causing a significant decrease in real-time imaging. This creates a critical trade-off challenge between real-time performance and image quality in ultrasonic diagnosis. In order to solve this problem, in this study, we introduce an imaging method that selectively enhances regional image quality while preserving real-time capability. This method can comprehensively consider the needs of different imaging scenarios and design one or more signal processing links specifically in local areas, thereby achieving intelligent characteristic enhancement functions such as Noise Suppression and Texture Enhancement. The results of the phantom test show that the Noise Suppression function of HD Scope+ has improved by an average of 59.05%, 0.63dB, and 0.0207 in contrast ratio (CR), contrast-to-noise ratio (CNR), and generalized contrast-to-noise ratio (gCNR) indexes compared to those of conventional B-images. In addition, the Texture Enhancement function of the HD Scope+ has increased the −6 dB fullwidth at half-maximum (FWHM) index by a maximum of 77.12%. The diagnostic results of hemangioma and pancreatic cyst indicate that the HD Scope+ can provide richer local image characteristic, which is helpful for improving the accuracy of ultrasound diagnosis.

         

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