| 摘要 |
FIELD: physics. ^ SUBSTANCE: characteristics of an object are determined based on mean free path length of penetrating radiation. An incident beam of penetrating radiation is generated, said beam being characterised by direction of propagation and energy distribution. Groups of detector elements are placed in the zone of the penetrating radiation beam in which each detector element is characterised by a field of view. The field of view of each detector element is collimated. Radiation scattered by the group of voxels of the object under investigation is detected, where each voxel is the intersection the field of view of at least one detector element with the direction of propagation of the incident penetrating radiation beam. Attenuation of the scattered penetrating radiation between pairs of voxels is calculated, where each voxel from the said pair corresponds to at least one of two directions of propagation of the incident penetrating radiation beam. ^ EFFECT: more accurate determination of characteristics of a monitored object. ^ 14 cl, 11 dwg |
