Experimental Study of Aperiodic Plane Wave Imaging for Ultrafast 3-D Ultrasound Imaging.
Experimental Study of Aperiodic Plane Wave Imaging for Ultrafast 3-D Ultrasound Imaging.
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DOI：
10.1109/tbme.2022.3152212
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发表时间：
2022-08
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虽然以不同角度引导多个平面波（PWs）的平面波成像（PWI）可以实现超快的三维（3-D）超声成像，但在图像质量和帧率之间仍然存在一个具有挑战性的权衡。为了应对这一挑战，我们最近提出了非周期PWI (APWI)，并进行了数学分析和模拟研究。在本文中，我们论证了APWI的可行性，并通过模拟实验和体内实验对其性能进行了评价。对同心圆环角型APWI （APWI- c）和向日葵型APWI （APWI- s）进行评价。为了验证该方法的有效性，将实验结果与仿真结果在空间分辨率和主副瓣比方面进行了比较。此外，通过使用商用模体，将APWI与传统PWI的性能进行了比较。为了研究APWI的临床应用潜力，还进行了模拟胆结石的幻影研究和活体颈动脉实验。在幻体研究中，APWI方法提供的对比度比PWI高约2-3 dB。在一个胆结石模拟实验中，所提出的方法产生的三维渲染的结石图像比PWI更接近真实的结石。在活体颈动脉图像中，APWI减少了动脉内的杂波伪影。幻影和活体研究表明，APWI在不影响空间分辨率和帧率的情况下增强了对比度。实验证明了APWI在超快速三维超声成像中的可行性和优越性。
Although plane wave imaging (PWI) with multiple plane waves (PWs) steered at different angles enables ultrafast three-dimensional (3-D) ultrasonic imaging, there is still a challenging tradeoff between image quality and frame rate. To address this challenge, we recently proposed the aperiodic PWI (APWI) with mathematical analysis and simulation study. In this paper, we demonstrate the feasibility of APWI and evaluate the performance with phantom and in vivo experiments. APWI with a concentric ring angle pattern (APWI-C) and APWI with a sunflower pattern (APWI-S) are evaluated. For experimental verification of the methods, the experimental results are compared with simulation results in terms of the spatial resolution and the mainlobe-to-sidelobe ratio. In addition, the performance of APWI is compared with that of conventional PWI by using a commercial phantom. To examine the potential for clinical use of APWI, a gallstone-mimicking phantom study and an in vivo carotid artery experiment are also conducted. In the phantom study, the APWI methods provide a contrast ratio approximately 2–3 dB higher than that of PWI. In a gallstone mimicking experiment, the proposed methods yield 3-D rendered stone images more similar to the real stones than PWI. In the in vivo carotid artery images, APWI reduces the clutter artifacts inside the artery. Phantom and in vivo studies show that the APWI enhances the contrast without compromising the spatial resolution and frame rate. This study experimentally demonstrates the feasibility and advantage of APWI for ultrafast 3-D ultrasonic imaging.