Christian Doppler Laboratory for Photoacoustic Imaging and Laser Ultrasonics, Altenberger Strasse 69, A-4040 Linz, Austria.
J Acoust Soc Am. 2012 May;131(5):3763-74. doi: 10.1121/1.3699194.
Understanding and compensating ultrasound attenuation losses is an important issue in photoacoustic imaging. To contribute to this effort, simulated attenuated time domain waveforms are compared to experimental waveforms. The experimental waveforms are acquired by transmitting broadband ultrasound pulses through distilled water and porcine fat tissue. Three well-known modeling approaches are examined in detail with regard to accuracy and computation time. Furthermore, the influence of attenuation on imaging resolution is addressed. In the present paper, the focus lies on the calculation of attenuated detector signals. The results, however, also provide clues about the quality of image reconstruction.
理解和补偿超声衰减损失是光声成象中的一个重要问题。为了对此有所贡献，模拟衰减的时域波形与实验波形进行了比较。实验波形是通过传输宽带超声脉冲穿过蒸馏水和猪脂肪组织获得的。对三种著名的建模方法在准确性和计算时间方面进行了详细的研究。此外，还讨论了衰减对成象分辨率的影响。在本文中，重点放在衰减的探测器信号的计算上。然而，结果也提供了关于图象重建质量的线索。
