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Proceedings Paper

Combined photoacoustic and magneto-motive ultrasound imaging
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Paper Abstract

Ultrasound imaging can provide excellent resolution at reasonable depths while retaining the advantages of being nonionizing, cost-effective and portable. However, the contrast in ultrasound imaging is limited, and various ultrasoundbased techniques such as photoacoustic (PA) and magneto-motive ultrasound (MMUS) imaging have been developed to augment ultrasound imaging. Photoacoustic imaging enhances imaging contrast by visualizing the optical absorption of either tissue or injected contrast agents (e.g., gold or silver nanoparticles). MMUS imaging enhances the sensitivity and specificity of ultrasound based on the detection of magnetic nanoparticles perturbed by an external magnetic field. This paper presents integrated magneto-photo-acoustic (MPA) imaging - a fusion of complementary ultrasound-based imaging techniques. To demonstrate the feasibility of MPA imaging, porcine ex-vivo tissue experiments were performed using a dual contrast (magnetic/plasmonic) agent. Spatially co-registered and temporally consecutive ultrasound, photoacoustic, and magneto-motive ultrasound images of the same cross-section of tissue were obtained. Our ex-vivo results indicate that magneto-photo-acoustic imaging can be used to detect magnetic/plasmonic nanoparticles with high resolution, sensitivity and contrast. Therefore, our study suggests that magneto-photo-acoustic images can identify the morphological properties, molecular information and complementary functional information of the tissue.

Paper Details

Date Published: 23 February 2010
PDF: 7 pages
Proc. SPIE 7564, Photons Plus Ultrasound: Imaging and Sensing 2010, 756433 (23 February 2010); doi: 10.1117/12.842406
Show Author Affiliations
Min Qu, The Univ. of Texas at Austin (United States)
Seungsoo Kim, The Univ. of Texas at Austin (United States)
Mohammad Mehrmohammadi, The Univ. of Texas at Austin (United States)
Srivalleesha Mallidi, The Univ. of Texas at Austin (United States)
Pratixa Joshi, The Univ. of Texas at Austin (United States)
Kimberly Homan, The Univ. of Texas at Austin (United States)
Yun-Sheng Chen, The Univ. of Texas at Austin (United States)
Stanislav Emelianov, The Univ. of Texas at Austin (United States)


Published in SPIE Proceedings Vol. 7564:
Photons Plus Ultrasound: Imaging and Sensing 2010
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)

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