METHOD FOR OBTAINING OBJECT INTERNAL STRUCTURE IMAGE BY MEANS OF PENETRATING RADIATION

摘要

A method of nondestructive investigation of the internal structure of an object uses deflected penetrating radiation. In one embodiment, an incident penetrating radiation flow (4) with angular divergence restricted by a collimator (3) passes through an object (5) to create the radiation flow (6) registered by a direction-selective detector (10). Typically, the directivity pattern of detector (10) selects a desired angle and has a width no larger than twice the local angular divergence of the incident penetrating radiation flow (4). The desired angle can be the maxima of a scattering pattern for a substance suspected of being in object (5). To improve the quality and range of measurements, the local restrictions of radiation flow (4) is fulfilled in the two intersecting planes; and detector (10) and/or incident radiation flow (4) can be swept through a range of orientations to detect radiation deflected at a range of angles larger than the directivity pattern detector (10) has when fixed.