METHOD AND X-RAY COMPUTER TOMOGRAPH FOR THE NON-DESTRUCTIVE TESTING OF OBJECTS CONSTRUCTED FROM MATERIAL LAYERS BY MEANS OF X-RAY COMPUTER TOMOGRAPHY

摘要

In a method for the non-destructive testing of objects constructed from material layers (17) running substantially parallel to an x-y plane (E), grey-scale value profiles and associated gradient profiles are determined from object data, obtained using X-ray computer tomography, along a plurality of evaluation directions (A1 to A5) running parallel to the x-y plane (E) and at a plurality of positions (Si) in a z direction which runs perpendicular to the x-y plane (E). An associated structure direction (22) can be inferred for each material layer (17) by evaluating the gradient profiles since the absorption of X-rays has a preferred direction which can be discerned in one of the gradient profiles. Objects constructed from a plurality of material layers (17) can be simply and reliably checked in a non-destructive manner in this way.