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Fast Monte Carlo simulations of ultrasound-modulated light using a graphics processing unit

Leung, TS; Powell, S; (2010) Fast Monte Carlo simulations of ultrasound-modulated light using a graphics processing unit. Journal of Biomedical Optics , 15 (5) , Article 055007. 10.1117/1.3495729. Green open access

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Abstract

Ultrasound-modulated optical tomography (UOT) is based on "tagging" light in turbid media with focused ultrasound. In comparison to diffuse optical imaging, UOT can potentially offer a better spatial resolution. The existing Monte Carlo (MC) model for simulating ultrasound-modulated light is central processing unit (CPU) based and has been employed in several UOT related studies. We reimplemented the MC model with a graphics processing unit [(GPU), Nvidia GeForce 9800] that can execute the algorithm up to 125 times faster than its CPU (Intel Core Quad) counterpart for a particular set of optical and acoustic parameters. We also show that the incorporation of ultrasound propagation in photon migration modeling increases the computational time considerably, by a factor of at least 6, in one case, even with a GPU. With slight adjustment to the code, MC simulations were also performed to demonstrate the effect of ultrasonic modulation on the speckle pattern generated by the light model (available as animation). This was computed in 4 s with our GPU implementation as compared to 290 s using the CPU. (C) 2010 Society of Photo-Optical Instrumentation Engineers. [DOI: 10.1117/1.3495729]

Type: Article
Title: Fast Monte Carlo simulations of ultrasound-modulated light using a graphics processing unit
Open access status: An open access version is available from UCL Discovery
DOI: 10.1117/1.3495729
Publisher version: http://dx.doi.org/10.1117/1.3495729
Language: English
Additional information: Copyright 2010 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Keywords: ultrasound modulated optical tomography, acousto-optics, Monte Carlo, graphics processing unit, compute unified device architecture, MULTIPLY SCATTERED-LIGHT, OPTICAL TOMOGRAPHY, MEDIA, MECHANISMS, TRANSPORT, PHOTONS, TISSUE
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/546675
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