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Laminography is a special kind of X-ray tomography used for flat samples. When a flat sample like for example a printed circuit board is examined in a CT, the X-ray absorption in the sample will increase drastically when the long edge of the sample is nearly parallel to the direction of the X-rays. In such cases it is advantageous to tilt the sample, so the normal to its large plane is not parallel to the incident beam and then rotate the sample around this vector perpendicular to the large plane of the sample. With a CCD-camera radiographs are taken under different rotation angles and from these a 3D-image of the sample is calculated.


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