| 摘要 |
The method makes it possible to reconstitute the shape and position of objects (1) in space from at least three projections of these objects, obtained by transmitting waves which are affected by passing through these objects. …<??>For each point of these projections (P1, P2), the distance (li, di) travelled through an object by each ray emanating from one of the sources is determined, the volume (ABCD) which contains the object (1) and the rays emanating from the two sources which pass through this object is determined, the distances (li, di) travelled by the rays in the object are plotted starting from the outer boundaries of the volume (ABCD) containing the object, in order to define a space necessarily interior to the object, then starting from the latter by plotting distances, a space necessarily exterior to the object and more confined than the initial volume. …<??>Used to reconstitute an object in space starting from a reduced number of projections. …<IMAGE>… |
