In this paper, we investigated a C-arm tomographic technique as a new three dimensional (3D) kidney imaging method for nephrolithiasis and kidney stone detection over view angle less than 180o. Our C-arm tomographic technique provides a series of two dimensional (2D) images with a single scan over 40o view angle. Experimental studies were performed with a kidney phantom that was formed from a p...

We formulate a block-iterative algorithmic scheme for the solution of systems of linear inequalities and/or equations and analyze its convergence. This study provides as special cases proofs of convergence of (i) the recently proposed component averaging (CAV) method of Censor, Gordon, and Gordon [Parallel Comput., 27 (2001), pp. 777–808], (ii) the recently proposed block-iterative CAV (BICAV) ...

Simultaneous algebraic reconstruction technique (SART) [1, 2] is an iterative method for solving inverse problems of form Ax(+n) = b. This type of problems arises for example in computed tomography reconstruction, in which case A is obtained from discrete Radon transform. In this paper, we provide several methods for derivation of SART and connections between SART and other methods. Using these...

Three-dimensional (3D) reconstruction of electron tomography (ET) has emerged as an important technique in analyzing structures of complex biological samples. However most of existing reconstruction methods are not suitable for extremely noisy and incomplete data conditions. We present an adaptive simultaneous algebraic reconstruction technique (ASART) in which a modified multilevel access sche...

The Bregman method is utilized to quantitatively improve the simultaneous reconstruction of absorption and scattering coefficients for both Jacobian-based and gradient-based methods in quantitative photoacoustic tomography with multiple optical excitations. It is the synergistic combination of Bregman method and the total-variation regularization in achieving the desired quantitative improvemen...

Floating hip injuries and ipsilateral femoral neck and shaft fractures are rare. Additionally, the simultaneous occurrence of these injuries is extremely rare, and only one case report of the simultaneous occurrence of these injuries has been published. Here, we report the case of a patient with ipsilateral acetabular and femoral neck and shaft fractures following a suicide attempt. The patient...

Introduction The combination of simultaneous multi-slice (SMS) acquisition with parallel imaging enables highly-accelerated MRI experiments [1,2]. However, most existing methods use highly structured k-space sampling, and require either prior knowledge of the coil sensitivity maps [1,2] or autocalibration data [3]. In this work, we propose a constrained reconstruction framework that works with ...