Collimator for tomography

Collimator for tomoscintigraphy, which is to be placed in front of the sensitive crystal of a gamma camera, of the type comprising a plurality of adjacent parallel tubes to be traversed lengthwise by the radiation from the organ under observation, characterized in that it is constituted by several juxtaposed sets of tubes, each set of tubes having the direction of its tubes selectively oriented toward the same organ under observation via orientation means for controlling the orientation, this direction corresponding to that of the tube placed substantially in the center of the set, so as to define, for each set, an incidence angle corresponding to a scintigraphic image of the organ under observation, so as to permit with each step of rotation of the gamma camera, selective registration of information corresponding to as many images as there are sets in the collimator.