Donghui Lu

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Scoliosis, the abnormal lateral curvature of the spine, is an idiopathic disease often suffered by teenagers. Normally medical doctors use X-rays to measure the Cobb angle, and then assess the severity of scoliosis with it. In this paper, we point out the superiorities of image processing technique through analyzing the existing methods in the diagnosis of(More)
Combining the Fourier diffraction theorem and the nonuniform fast Fourier transform (NUFFT), this paper describes a new efficient approach for Lamb wave diffraction tomography. Frequency-domain sampling distribution corresponding to crosshole configuration and fan beam configuration is respectively studied. It shows that crosshole projection leaves large(More)
Computed Tomography(CT) is one of the successful methods, in which mathematical theories are combined with engineering technology. Volume CT will replace the cross-sectional CT that has been widely used. In this paper two new cone vertex orbits, which are circle-and-arc and regular triangular pyramid lines, have been proposed and their complete conditions(More)
Ultrasonic Lamb wave nondestructive evaluation (NDE) is one useful mean to insure the structure integrity of fiber-reinforced composites. In order to take full advantage of the information contained in Lamb wave testing, it is very helpful to have a clear understanding on Lamb wave propagation characteristics in the nondestructive evaluation of these(More)
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