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arXiv 2001.11460math.AP
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用局部数据反演辐射输运

Inverse Radiative Transport with Local Data

Francis J. Chung

摘要:

本文考虑辐射输运方程的反问题,其中边界源和测量值被限制在域$Ω$边界的单个子集$E$上。我们表明,这个问题可以得到解决,如果通过$E$的X射线变换线的限制是可逆的$Ω$。特别是,如果$Ω$是严格凸的,我们表明,这个本地数据问题可以解决全球每当$E$是一个开子集的边界。证明依赖于隔离和分析的第二项的冲突扩展的解决方案的RTE,基本上考虑光的散射正好一次内的域。

英文摘要:

We consider an inverse problem for a radiative transport equation (RTE) in which boundary sources and measurements are restricted to a single subset $E$ of the boundary of the domain $Ω$. We show that this problem can be solved globally if the restriction of the X-ray transform to lines through $E$ is invertible on $Ω$. In particular, if $Ω$ is strictly convex, we show that this local data problem can be solved globally whenever $E$ is an open subset of the boundary. The proof relies on isolation and analysis of the second term in the collision expansion for solutions to the RTE, essentially considering light which scatters exactly once inside the domain.

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