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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >The influences of ambiguity phase aberration profiles on focusing quality in the very near field-part II: dynamic range focusing on reception
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The influences of ambiguity phase aberration profiles on focusing quality in the very near field-part II: dynamic range focusing on reception

机译:模糊相位像差轮廓对非常近场部分II中聚焦质量的影响:动态范围聚焦于接收

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For pt. I see ibid., vol. 49, no. 1, p. 57-71 (2002). The influences of ambiguity phase aberration profiles, including constant, tilted, and quadratic profiles, on focusing quality have been quantitatively analyzed with the very near field approximation for single range focusing on transmission. In this paper, their influences are analyzed in a very different situation: dynamic range focusing on reception, which is commonly used in medical ultrasound imaging for beam formation on reception. It is shown that the results for dynamic range focusing on reception are dramatically different from those for single range focusing on transmission. For example, constant phase aberration profiles are harmless to focusing quality for single range focusing on transmission but become harmful for dynamic range focusing on reception. The analysis also shows that, compared with single range focusing on transmission, dynamic range focusing on reception is much more sensitive to ambiguity phase aberration profiles, which have adverse effects on focusing quality even in the near field and far field. These significant differences are caused by the fundamental differences between single range focusing and dynamic range focusing as well as between transmission and reception. Numerical and simulation results are also derived to test the correctness and accuracy of the theoretical results.
机译:对于pt。我看同上。 49号1页57-71(2002)。包括恒定,倾斜和二次轮廓在内的模糊相位像差轮廓对聚焦质量的影响已通过非常近场近似(针对聚焦于透射的单个范围)进行了定量分析。在本文中,将在非常不同的情况下分析它们的影响:动态范围聚焦于接收,这通常在医学超声成像中用于在接收时形成波束。结果表明,聚焦于接收的动态范围的结果与聚焦于发射的单范围的结果截然不同。例如,恒定相位像差轮廓对于聚焦于发射的单个范围的聚焦质量无害,但对于聚焦于接收的动态范围则有害。分析还表明,与专注于发射的单个范围相比,专注于接收的动态范围对模糊相差像差更为敏感,即使在近场和远场中,模糊相差也会对聚焦质量产生不利影响。这些重大差异是由单范围聚焦和动态范围聚焦之间以及发送和接收之间的根本差异引起的。还导出了数值和仿真结果,以测试理论结果的正确性和准确性。

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