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Proceedings Paper

Image registration for limited-view photoacoustic imaging using two linear array transducers
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Paper Abstract

Imaging complicated structures with photoacoustic (PA) modality when the field of view is limited can result in significant imaging artifacts or missing structures. Approaches to solve this problem include new reconstruction algorithms and specific transducer structures, such as hemi-spherical transducer arrays for breast cancer detection. However, most existing PA imaging techniques require either fullview complete projection data collection or complex and computationally-intensive reconstructions. Such approaches are not only time-consuming but also unsuitable for many clinical applications, because most clinical imaging hardware is constrained to limited reconstruction angles. In this paper, we present a method of using two commercial linear array transducers at different orientations to increase the view angle and thus improve the reconstruction of PA imaging. The method involves a two-step process. First, a calibration phantom is imaged to calibrate the relative position of these two linear transducers. Second, two PA images are obtained by a simple back projection algorithm and these images are registered using the information from the calibration process. The final registered image contains more detailed structures without the requirements of a specialized transducer or long processing time. Experimental results show that this method has the potential to provide good image quality using standard low-cost transducers.

Paper Details

Date Published: 11 March 2015
PDF: 6 pages
Proc. SPIE 9323, Photons Plus Ultrasound: Imaging and Sensing 2015, 932348 (11 March 2015); doi: 10.1117/12.2077740
Show Author Affiliations
Weihang Shu, Univ. of British Columbia (Canada)
Min Ai, Univ. of British Columbia (Canada)
Tim Salcudean, Univ. of British Columbia (Canada)
Robert Rohling, Univ. of British Columbia (Canada)
Purang Abolmaesumi, Univ. of British Columbia (Canada)
Shuo Tang, Univ. of British Columbia (Canada)

Published in SPIE Proceedings Vol. 9323:
Photons Plus Ultrasound: Imaging and Sensing 2015
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)

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