Ashkan Javaherian

Ashkan Javaherian

Position: Postdoctoral Research Associate
Room: Malet Place Engineering Building, 3.23
Address: Department of Medical Physics and Biomedical Engineering
University College London
Malet Place Engineering Building
Gower Street, London, WC1E 6BT


I got my BSc and MSc degrees in Biomedical Engineering, respectively majoring in Bioelectric and Radio-medical engineering, from Shiraz university in Iran. After a PhD in Applied Mathematics at the University of Manchester, I joined the Biomedical Ultrasound Group (BUG) at UCL.  In the BUG group, I am working on ray-based methods for medical ultrasound computed tomography. Under supervision of Dr. Ben Cox, I developed a refraction-corrected ray-based method for full-3D ultrasound tomography of the breast.

During my PhD, I worked on the application of inverse problems, specifically iterative variational approaches, in Photoacoustic Tomography (PAT) and Quantitative Photoacoustic Tomography (QPAT). Under supervision of Dr. Sean Holman, I established an iterative framework for Photo-acoustic tomography of the brain using an adjoint-assisted inversion approach that accounts for absorption and dispersion. I also proposed a linearised inversion method for a single-stage simultaneous reconstruction of the optical parameters from the PAT time series. Using some realistic simulation studies, I showed that a linearised version of the single-stage problem of QPAT can significantly improve the image reconstruction, compared to the nonlinear gradient-based methods.

Journal Publications


M. Bakaric; P. Miloro; A. Javaherian; B. T. Cox; B. E. Treeby; M. D. Brown

Measurement of the ultrasound attenuation and dispersion in 3D-printed photopolymer materials from 1 to 3.5 MHz Journal Article

In: J. Acoust. Soc. Am., 150 (4), pp. 2798-2805, 2021.

Links | BibTeX


A. Javaherian; B. T. Cox

Ray-based inversion accounting for scattering for biomedical ultrasound tomography Journal Article

In: Inverse Problems, 37 (11), pp. 115003, 2021.

Links | BibTeX


A. Javaherian; F. Lucka; B. T. Cox

Refraction-corrected ray-based inversion for three-dimensional ultrasound tomography of the breast Journal Article

In: Inverse Problems, 36 , pp. 125010, 2020.

Links | BibTeX


A. Javaherian; S. Holman

Direct quantitative photoacoustic tomography for realistic acoustic media Journal Article

In: Inverse Problems, 35 (8), pp. 084004, 2019.

Links | BibTeX


A. Javaherian; S. Holman

A continuous adjoint for photoacoustic tomography of the brain Journal Article

In: Inverse Problems, 34 (8), pp. 085003, 2018.

Links | BibTeX

Conference Publications

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