The acoustic radiation force impulse (ARFI) has been widely used in transient shear wave elasticity imaging (SWEI). For SWEI based on focused ARFI, the highest image quality exists inside the focal zone due to the limitation of the depth of focus and diffraction. Consequently, the areas outside the focal zone and in the near field present poor image quality. To address the limitations of the focused beam, we introduce Bessel apodized ARFI that enhances image quality and improves the depth of focus. The objective of this study is to evaluate the feasibility of SWEI based on Bessel ARF in simulation and experiment. We report measurements of elastogram image quality and depth of field in tissue-mimicking phantoms and ex vivo liver tissue. Our results demonstrate improved depth of field, image quality, and shear wave speed (SWS) estimation accuracy using Bessel push beams. As a result, Bessel ARF enlarges the field of view of elastograms. The signal-to-noise ratio (SNR) of Bessel SWEI is improved 26% compared with focused SWEI in homogeneous phantom. The estimated SWS by Bessel SWEI is closer to the measured SWS from a clinical scanner with an error of 0.3% compared to 2.4% with a focused beam. In heterogeneous phantoms, the contrast-to-noise ratios (CNRs) of shallow and deep inclusions are improved by 8.79 and 3.33 dB, respectively, under Bessel ARF. We also compare the results between Bessel SWEI and supersonic shear imaging (SSI), and the SNR of Bessel SWEI is improved by 8.1%. Compared with SSI, Bessel SWEI shows more accurate SWS estimates in high stiffness inclusions. Finally, Bessel SWEI can generate higher quality elastograms with less energy than conventional SSI.

中文翻译：

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使用非衍射贝塞尔切趾声辐射力的剪切波弹性成像。

声辐射力脉冲 (ARFI) 已广泛用于瞬态剪切波弹性成像 (SWEI)。对于基于聚焦 ARFI 的 SWEI，由于聚焦深度和衍射的限制，聚焦区域内的图像质量最高。因此，聚焦区外和近场中的区域呈现较差的图像质量。为了解决聚焦光束的局限性，我们引入了贝塞尔切趾 ARFI，它可以提高图像质量并改善焦深。本研究的目的是评估基于贝塞尔ARF的SWEI在仿真和实验中的可行性。我们报告了模拟组织模型和离体肝组织中弹性图图像质量和景深的测量结果。我们的结果表明景深、图像质量、和使用贝塞尔推梁的剪切波速度 (SWS) 估计精度。因此，Bessel ARF 扩大了弹性图的视野。与均匀体模中的聚焦 SWEI 相比，Bessel SWEI 的信噪比 (SNR) 提高了 26%。Bessel SWEI 估计的 SWS 更接近临床扫描仪测得的 SWS，误差为 0.3%，而聚焦光束的误差为 2.4%。在异质模型中，在贝塞尔 ARF 下，浅层和深层夹杂物的对比度噪声比 (CNR) 分别提高了 8.79 和 3.33 dB。我们还比较了贝塞尔 SWEI 和超声剪切成像 (SSI) 的结果，贝塞尔 SWEI 的信噪比提高了 8.1%。与 SSI 相比，Bessel SWEI 在高刚度夹杂物中显示出更准确的 SWS 估计。最后，