Microlocally accurate solution of the inverse source problem of thermoacoustic tomography

Microlocally accurate solution of the inverse source problem of thermoacoustic tomography
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热声层析成像逆源问题的微局部精确求解

DOI:
10.1088/1361-6420/ab9c46
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发表时间:
2020
期刊:
影响因子:
2.1
通讯作者:
Kunyansky, L
Kunyansky, L
中科院分区:
数学2区
文献类型:
--
作者:
Eller, M;Hoskins, P;Kunyansky, L

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我们考虑热声和光声断层扫描的逆源问题,数据记录在部分围绕声波源的开放表面上。在声速恒定的假设下,我们开发了一种显式的非迭代重建程序,可以恢复所寻找源的 Radon 变换,直至无限平滑的加性误差项。然后可以通过 Radon 变换的逆变换找到源。我们的分析本质上是微局部的,并且不提供对如此获得的图像中的误差的规范估计。然而,数值模拟表明,这个误差在实际应用中相当小。对于数据在二维圆弧上给出的情况,我们还提出了该过程的渐近快速实现。
We consider the inverse source problem of thermo-and photoacoustic tomography, with data registered on an open surface partially surrounding the source of acoustic waves. Under the assumption of constant speed of sound we develop an explicit non-iterative reconstruction procedure that recovers the Radon transform of the sought source, up to an infinitely smooth additive error term. The source then can be found by inverting the Radon transform. Our analysis is microlocal in nature and does not provide a norm estimate on the error in the so obtained image. However, numerical simulations show that this error is quite small in practical terms. We also present an asymptotically fast implementation of this procedure for the case when the data are given on a circular arc in 2D.
DOI: --
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影响因子: 2
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发表时间: 1999-09-01
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