نتایج جستجو برای: algebraic reconstruction technique art
تعداد نتایج: 931843 فیلتر نتایج به سال:
In the long-distance space target detection, technique of laser reflection tomography (LRT) shows great power and attracts more attention for further study real use. However, targets are often non-cooperative, normally a 360° complete view projections cannot be obtained. Therefore, this article firstly introduces an improved LRT system design with advanced equipment non-cooperative detection to...
We determined the variations in seismic structure beneath southern California by using a tomographic method of inversion on teleseismic P delays recorded with the Southern California Array. The algorithm employed was a modified form of an Algebraic Reconstruction Technique (ART) used in medical X-ray imaging. Deconvolution with an empirically estimated point spread function was also used to hel...
Tomographic reconstruction is the process of reconstructing a 3-D object or its cross section from several of its 2-D projection images. The object is illuminated by a cone-beam of Xrays, where the signal is attenuated by the object. Due to its speed filtered back projection (FBP) still is state-of-the-art in 3-D reconstruction for clinical use where time matters. But considering the accuracy a...
Incomplete tomographic data sets such as limited view (missing wedge) data represent a well-known challenge for reconstruction algorithms, since they unavoidably lead to substantial image artefacts. Such data sets may occur in industrial computed tomography of limited access (e.g. extended components, fixed objects), directional opacity, limited sample life time or laminographic set-up. We pres...
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