Ray Imaging Systems

Early images of the X-ray sky were produced using collimated X-ray detectors, where a metal tube (called a 

FIGURE 1 Focusing geometry of a Wolter type I grazing incidence X-ray telescope constructed by a paraboloid followed by a hyperboloid cylindrical mirror. In X-ray telescopes a number (2,4, or hundreds) of such shells are nested, or placed one inside the other, to improve the X-ray gathering power of the mirror. 

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Figure 1 X-ray imaging system with calibration body and test sample...

To describe the X-ray imaging system the projection of 3D object points onto the 2D image plane, and nonlinear distortions inherent in the image detector system have to, be modelled. A parametric camera model based on a simple pinhole model to describe the projection in combination with a polynomal model of the nonlinear distortions is used to describe the X-ray imaging system. The parameters of the model are estimated using a two step approach. First the distortion parameters for fixed source and detector positions are calculated without any knowledge of the projection parameters. In a second step, the projection parameters are calculated for each image taken with the same source and detector positions but with different sample positions. 

Doering, E.R. Basart,. I.P. Gray,. I.N. Three-dimensional flaw reconstruction and dimensional analysis using a real-time X-ray imaging system. NDT-I-E International, Vol. 26(1), 1993, pp. 7-17. 

W. Xie, N. Chen, A.L. Abbott and R.W. Conners, Simulation of x-ray imaging systems for lugjage inspection in Proc. 2nd Explosives Detection Technology Symposium Aviation Security Technology Conference, 12—15 November 1996, Atlantic City, NJ, FAA (1997) 248—253. 

Migeon, S. 0. Weber, J.-C. Faugeres J. Saint-Paul, 1999. SCOPIX A new X-ray imaging system for core analysis. Geo-Marine Lett. 18 251-255. 

Digital X-ray imaging system An X-ray source coupled to a brightness amplifier and digital camera. This allows contrast improvement for fine detail and image enhancement. 

HARD X-RAY AND GAMMA-RAY IMAGING SYSTEMS UTILIZING GERMANIUM STRIP DETECTORS... 

Hard X-ray and gamma-ray Imaging systems utilizing Germanium strip detectors... 

Three-dimensional imaging has been developed from images obtained with multiple modalities, but computed tomography and magnetic resonance imaging represent the most common data sets in the musculoskeletal applications of 3D imaging. However, a recent X-ray imaging system (EOS) has also developed and may have potential useful indications in future. 

The EOS system is new X-ray imaging system unique in that it combines the advantages of 3D imaging, very low irradiation doses, and weight bearing fullbodyscanning of simultaneous face and profile. This result is the combination of two major innovations ... 

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