Schichtauflösende Röntgen-Durchstrahlung mit Hilfe der Computer-Laminografie

X-ray computerised laminography (CL) resonstructs cross sections of an object with high resolution. In case of the conventional laminography, well known as radiographic technique, x-ray source and detector system perform movements on rotary or straight lines in two different planes relative to the fixed object, or the source is stationary and both the object and the detector rotate synchronously. Computerised laminography only needs a linear moving of the object relative to the stationary fan-beam and the stationary detector system. Projections measured of different object positions are computer aided reorganised. This reorganised projections are identical to the data collection as used in computerised tomography (CT) with parallel beam geometry. Therefore the in CT well known algorithms as ART can be used for reconstruction of laminograms. In nondestructive testing purpose CL is suited for investigations of large extended objectslike as process control of sophisticated electronics bo ards. it is not necessary that the whole object is completely in the fan-beam during the whole measurement. Results from simulations and experiments are reported and discussed in view of resolutions.