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Laplace deconvolution on the basis of time domain data and its application to Dynamic Contrast Enhanced imaging by Comte, Fabienne; Cuenod, Charles-A.; Pensky, Marianna; Rozenholc, Yves is a scholarly article available to read on EtoBox.

What is Laplace deconvolution on the basis of time domain data and its application to Dynamic Contrast Enhanced imaging about?

In the present paper we consider the problem of Laplace deconvolution with noisy discrete non-equally spaced observations on a finite time interval. We propose a new method for Laplace deconvolution which is based on expansions of the convolution kernel, the unknown function and the observed signal over Laguerre functions basis (which acts as a surrogate eigenfunction basis of the Laplace convolution operator) using regression setting. The expansion results in a small system of linear equations with the matrix of the system being triangular and Toeplitz. Due to this triangular structure, there is a common number $m$ of terms in the function expansions to control, which is realized via complexity penalty. The advantage of this methodology is that it leads to very fast computations, produces no boundary effects due to extension at zero and cut-off at $T$ and provides an estimator with the risk within a logarithmic factor of the oracle risk. We emphasize that, in the present paper, we consider the true observational model with possibly nonequispaced observations which are available on a finite interval of length $T$ which appears in many different contexts, and account for the bias as

Author

Comte, Fabienne; Cuenod, Charles-A.; Pensky, Marianna; Rozenholc, Yves

Published

2014

Language

EN