Zobrazeno 1 - 10
of 93
pro vyhledávání: '"Javaherian, Ashkan"'
Acoustic wave equation seeks to describe wavefield in terms of a volumetric radiation source, $s$, or a surface source. For the latter, an associated boundary-value problem yields a description for the wavefield in terms of a Kirchhoff-Helmholtz or R
Externí odkaz:
http://arxiv.org/abs/2212.04466
Autor:
Javaherian, Ashkan
This study proposes a Hessian-free ray-born inversion approach for biomedical ultrasound tomography. The proposed approach is a more efficient version of the ray-born inversion approach proposed in [3]. Using these approaches, the propagation of acou
Externí odkaz:
http://arxiv.org/abs/2211.00316
Autor:
Javaherian, Ashkan, Cox, Ben
An efficient and accurate image reconstruction algorithm for ultrasound tomography (UST) is described and demonstrated, which can recover accurate sound speed distribution from acoustic time series measurements made in soft tissue. The approach is ba
Externí odkaz:
http://arxiv.org/abs/2105.14098
Ultrasound Tomography has seen a revival of interest in the past decade, especially for breast imaging, due to improvements in both ultrasound and computing hardware. In particular, three-dimensional ultrasound tomography, a fully tomographic method
Externí odkaz:
http://arxiv.org/abs/2005.11204
Autor:
Javaherian, Ashkan, Holman, Sean
Quantitative photo-acoustic tomography (QPAT) seeks to reconstruct a distribution of optical attenuation coefficients inside a sample from a set of time series of pressure data that is measured outside the sample. The associated inverse problems invo
Externí odkaz:
http://arxiv.org/abs/1810.11685
Autor:
Javaherian, Ashkan, Holman, Sean
We present an optimization framework for photo-acoustic tomography of brain based on a system of coupled equations that describe the propagation of sound waves in linear isotropic inhomogeneous and lossy elastic media with the absorption and physical
Externí odkaz:
http://arxiv.org/abs/1802.04054
Autor:
Javaherian, Ashkan, Holman, Sean
Inspired by the recent advances on minimizing nonsmooth or bound-constrained convex functions on models using varying degrees of fidelity, we propose a line search multigrid (MG) method for full-wave iterative image reconstruction in photoacoustic to
Externí odkaz:
http://arxiv.org/abs/1603.02329
Publikováno v:
In Applied Mathematical Modelling November 2016 40(21-22):8985-9000
Autor:
Javaherian, Ashkan
This study proposes a Hessian-inversion-free ray-born inversion approach for biomedical ultrasound tomography. The proposed approach is a more efficient version of the ray-born inversion approach proposed in [3]. Using these approaches, the propagati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9b16fc1bb44abc80bfc6da14b906b6a
http://arxiv.org/abs/2211.00316
http://arxiv.org/abs/2211.00316
Publikováno v:
In Journal of Visual Communication and Image Representation October 2013 24(7):773-785