Limited-view multi-source quantitative photoacoustic tomography. (6th May 2015)

• Record Type: Journal Article
• Authors: Gao, Hao; Feng, Jing; Song, Liang
• Is Part Of: Inverse problems. Volume 31:Number 6(2015:Jun.)
• Publication Date: 2015-05-06
• Subjects: photoacoustic tomography -- numerical inverse problem -- numerical optimization; Inverse problems (Differential equations) -- Periodicals; 515.357
• DOI: 10.1088/0266-5611/31/6/065004
• Languages: English
• ISSNs: 0266-5611

Abstract

Abstract: A limited-view scheme is proposed for multi-source quantitative photoacoustic tomography (MS-QPAT), in which the acoustic measurements following each optical illumination are acquired on the partial boundary near the optical source instead of the entire boundary, namely the limited-view MS-QPAT. The proposed limited-view scheme has an improved signal-to-noise ratio when the data are measured near the optical source, and reduces the acquisition time of the imaging system with a single or limited-view acoustic detector. A limited-view MS-QPAT example is to acquire acoustic data following each of 90 optical illuminations, in contrast to acoustic data for each of 90 optical illuminations under the conventional MS-QPAT setting. However, due to the incomplete data, the initial acoustic pressure can no longer be stably reconstructed that serves as an intermediate step in the conventional two-step reconstruction that first reconstructs the initial acoustic pressure and then the optical coefficients. Therefore the direct reconstruction of optical coefficients is considered using the coupled opto-acoustic forward model. The reconstruction algorithm is based on the quasi-Newton method, i.e. limited-memory BFGS with efficient adjoint computations of objective function gradients, and the sparsity-regularized formulation is also considered with tensor framelet sparsity transform and solved by the alternating direction method of multipliers.