Journal of X-Ray Science and Technology - Volume 13, issue 1

Authors: Lou, Hong | Zhang, Qizhi | Gibson, Clayton | Li, Senhu | Jiang, Huabei

Article Type: Research Article

Abstract: A hand/joint radiograph from systems such as C-arm is a two-dimensional (2D) projection of a three-dimensional (3D) object. In this paper we describe a simple tomosynthesis algorithm that is particularly suited for 3D imaging of joints based on a C-arm system. The algorithm is tested and evaluated using projections from simulated joints and projections generated with a C-arm system from joints formed by chicken bones. The results obtained demonstrate that the algorithm is able to provide …accurate 3D reconstruction of joint structures. Show more

Citation: Journal of X-Ray Science and Technology, vol. 13, no. 1, pp. 1-8, 2005

Authors: Li, Hui | Zhang, Zhaotian | Tian, Jie

Article Type: Research Article

Abstract: Computed tomography plays an important role in industrial non-destructive testing, medical applications, astronomy and many other fields to analyze inner structures of scanned objects. This article addresses a new development of non-destructive testing software platform to efficiently detect inner flaws of space industrial components. As the key of our software, reconstruction algorithms of 2D industrial computed tomography including preprocess of raw data, re-arrange algorithm and filtered back-projection algorithms have been described in …detail in this article. Experimental results with four groups of real raw data from China Aerospace Science and Technology Corporation confirmed the accuracy of the reconstruction algorithm in our software. Forward algorithm of 2D industrial computed tomography is another important component of our software, which conveniently generates parallel-beam and fan-beam raw data with given parameters. Show more

Keywords: reconstruction algorithms, forward algorithms, industrial CT, imaging data preprocess

Citation: Journal of X-Ray Science and Technology, vol. 13, no. 1, pp. 9-21, 2005

Authors: Primout, M.

Article Type: Research Article

Abstract: In the context of target optimization for multi-keV x-ray production in laser experiment, we have adapted a method for visual observation of the conversion efficiency calculated from a large number of 1-D hydro-radiative simulations. A Monte Carlo method based on uniformly distributed random values for parameters in predefinite ranges has been used. The conversion efficiency can be considered as one constraint which leads to correlations between parameters. In addition, the sensitivity of the conversion efficiency to …the various target and laser parameters appears visually. Show more

Citation: Journal of X-Ray Science and Technology, vol. 13, no. 1, pp. 23-36, 2005

Authors: Lee, Susanne M. | Formica, Sarah P.

Article Type: Research Article

Abstract: Many different performance measures are used to characterize x-ray optics, sometimes resulting in radically different rankings. This makes it difficult, even for practitioners intimately involved in the field, to compare results from different optics and for different applications. To truly understand and appreciate advances in a specific type of optic – polycapillary optics – different methods of optic comparison are evaluated and their relevance explained. These methods include transmission efficiency, flux, flux …density, equivalent distance, normalized gain, insertion gain, and effective capture angle. Polycapillary focusing optics with varying input and output parameters are compared using these different performance standards. Show more

Keywords: polycapillary optics, transmission efficiency, equivalent distance, normalized gain, insertion gain, effective capture angle

Citation: Journal of X-Ray Science and Technology, vol. 13, no. 1, pp. 37-47, 2005

Authors: Wang, Jing | Wang, Ge | Jiang, Ming

Article Type: Research Article

Abstract: In previous studies, we developed a blind deblurring algorithm based on the edge-to-noise ratio (ENR) and EM algorithm to improve the quality of spiral CT images. In this work, we apply the Wiener filter in place of the EM algorithm to improve the timing performance. The algorithm works well in patient studies. After fully automatic blind deblurring, the conspicuity of the submillimeter features of the cochlea image is substantially improved. The new ENR-Wiener blind deblurring approach …significantly improves the computation speed with comparable image quality in previous studies. Show more

Citation: Journal of X-Ray Science and Technology, vol. 13, no. 1, pp. 49-60, 2005

Article Type: Other

Citation: Journal of X-Ray Science and Technology, vol. 13, no. 1, pp. 61-62, 2005