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首页> 外文期刊>Inverse Problems: An International Journal of Inverse Problems, Inverse Methods and Computerised Inversion of Data >Joint reconstruction of the initial pressure and speed of sound distributions from combined photoacoustic and ultrasound tomography measurements
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Joint reconstruction of the initial pressure and speed of sound distributions from combined photoacoustic and ultrasound tomography measurements

机译:联合重建初始压力和声音分布速度的初始压力和超声波断层摄影测量

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摘要

The initial pressure and speed of sound (SOS) distributions cannot both be stably recovered from photoacoustic computed tomography (PACT) measurements alone. Adjunct ultrasound computed tomography (USCT) measurements can be employed to estimate the SOS distribution. Under the conventional image reconstruction approach for combined PACT/USCT systems, the SOS is estimated from the USCT measurements alone and the initial pressure is estimated from the PACT measurements by use of the previously estimated SOS. This approach ignores the acoustic information in the PACT measurements and may require many USCT measurements to accurately reconstruct the SOS. In this work, a joint reconstruction method where the SOS and initial pressure distributions are simultaneously estimated from combined PACT/USCT measurements is proposed. This approach allows accurate estimation of both the initial pressure distribution and the SOS distribution while requiring few USCT measurements.
机译:声音(SOS)分布的初始压力和速度不能单独从光声计算机断层扫描(PACT)测量稳定地恢复。 可以采用辅助超声计算断层扫描(USCT)测量来估计SOS分布。 在用于组合PACT / USCT系统的传统图像重建方法下,SOS单独估计来自USCT测量,并且通过使用先前估计的SOS从PATT测量估计初始压力。 该方法忽略了PACT测量中的声学信息,并且可能需要许多USCT测量来准确地重建SOS。 在这项工作中,提出了一个联合重建方法,其中SOS和初始压力分布同时估计来自组合的PACT / USCT测量。 这种方法允许准确地估计初始压力分布和SOS分布,同时需要少量USCT测量。

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