Patent ID: 6243601
Filing Date: 2001-06-05
Classification: A61B

Abstract:
Transillumination instrument comprising:a source of non-ionizing radiation;an object imaging section in which objects to be imaged are positioned;a detector for receiving said non-ionizing radiation after it has traversed through an object in said object imaging section; anda mechanical discriminator positioned adjacent to said detector and spaced away from said source by said object imaging section, said mechanical discriminator comprising at least one passage through which non-ionizing radiation which passes strait through an object in said object imaging section can traverse and be detected by said detector, but which prevents stray radiation which does not pass straight through said object from traversing the passage in the mechanical discriminator comprising a first opening and a second opening, the first and second openings connected by light-absorbing walls defining the passage from the first opening to the second opening, and wherein said passage has a ratio of diameter to length of 1/10 or less.