5 February 2018 Vector extrapolation methods for accelerating iterative reconstruction methods in limited-data photoacoustic tomography
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Abstract
As limited data photoacoustic tomographic image reconstruction problem is known to be ill-posed, the iterative reconstruction methods were proven to be effective in terms of providing good quality initial pressure distribution. Often, these iterative methods require a large number of iterations to converge to a solution, in turn making the image reconstruction procedure computationally inefficient. In this work, two variants of vector polynomial extrapolation techniques were deployed to accelerate two standard iterative photoacoustic image reconstruction algorithms, including regularized steepest descent and total variation regularization methods. It is shown using numerical and experimental phantom cases that these extrapolation methods that are proposed in this work can provide significant acceleration (as high as 4.7 times) along with added advantage of improving reconstructed image quality.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)
Navchetan Awasthi, Sandeep Kumar Kalva, Manojit Pramanik, Phaneendra K. Yalavarthy, "Vector extrapolation methods for accelerating iterative reconstruction methods in limited-data photoacoustic tomography," Journal of Biomedical Optics 23(7), 071204 (5 February 2018). https://doi.org/10.1117/1.JBO.23.7.071204 . Submission: Received: 29 September 2017; Accepted: 8 January 2018
Received: 29 September 2017; Accepted: 8 January 2018; Published: 5 February 2018
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