Abstract: X-ray computerized tomography (CT) is nowadays a standard radiological imaging technique in medical applications. CT would be ideal also for many industrial non-destructive testing in such cases we can use time enough for each separate test operation. As well known in medical CT, hundreds of projections are needed to reconstruct an accurate cross-sectional image of an object. But in industrial cases a process speed will put a time limit. We seldom have time to measure hundreds of projections of a cross section, neither can we rotate the object rapidly enough with control. So, from industrial point of view, Quality and Security Control can be realized economically only, if it is technically based on only few projections (1...3) using fixed geometry, i.e. one x-ray source-detector pair for each projection including special detectors and special image processing technique.!0
展开▼
