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

Weihang Shu; Min Ai; Tim Salcudean; Robert Rohling; Purang Abolmaesumi; Shuo Tang

doi:10.1117/12.2077740

11 March 2015 Image registration for limited-view photoacoustic imaging using two linear array transducers

Weihang Shu, Min Ai, Tim Salcudean, Robert Rohling, Purang Abolmaesumi, Shuo Tang

Proceedings Volume 9323, Photons Plus Ultrasound: Imaging and Sensing 2015; 932348 (2015) https://doi.org/10.1117/12.2077740
Event: SPIE BiOS, 2015, San Francisco, California, United States

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.

Citation Download Citation

Weihang Shu, Min Ai, Tim Salcudean, Robert Rohling, Purang Abolmaesumi, and Shuo Tang "Image registration for limited-view photoacoustic imaging using two linear array transducers", Proc. SPIE 9323, Photons Plus Ultrasound: Imaging and Sensing 2015, 932348 (11 March 2015); https://doi.org/10.1117/12.2077740

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