Diagnostic tomographic laser imaging apparatus

A - Human Necessities – 61 – B

Patent

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A61B 6/00 (2006.01) A61B 5/00 (2006.01) A61B 6/04 (2006.01)

Patent

CA 2223606

A laser imaging apparatus comprises (R) a platform (16) for supporting a female patient in frontdown, prone position, including an opening (20) permitting a breast of the patient to be vertically pendant below the surface of the platform; scanning mechanism including a multi-faceted mirror (38) adjacent the underside of the platform, the mirror being rotated about its own axis and orbited around the pendant breast; a source of coherent near infrared narrow light pulses operably directed to the multi-faceted mirror; optical reflectors directing the light pulses onto the facets of the mirror from a point spaced from the platform for reflection in a series of horizontal fan shaped beams through a breast pendant below the platform; photodetectors (40) operably disposed to detect the light pulses after passing through the breast; circuit for deriving voltages proportional to the intensity of the received pulses; and computer (10) programmed for storing and displaying images of tissue in the breast derived from the voltages.

Appareil d'imagerie laser ( R) constitué d'une plate-forme (16) destinée à soutenir une patiente dans une position allongée ventrale, comportant une ouverture (20) permettant à un sein de pendre verticalement sous la surface de la plate-forme, d'un mécanisme d'imagerie comportant un miroir à multiples facettes (38) adjacent à la face inférieure de la plate-forme, le miroir pouvant tourner sur son axe et autour du sein pendant, d'une source d'impulsions lumineuses cohérentes étroites proches de l'infrarouge dirigées sur le miroir à multiples facettes, de réflecteurs optiques orientant les impulsions lumineuses sur les facettes du miroir à partir d'un point situé à distance de la plate-forme, produisant par réflexion une série de rayons horizontaux en éventail traversant le sein pendant sous la plate-forme, de photodétecteurs (40) disposés de façon appropriée permettant de détecter les impulsions lumineuses après le passage dans le sein, d'un circuit permettant de dériver des tensions proportionnelles à l'intensité des impulsions reçues, et d'un ordinateur (10) programmé pour stocker et afficher des images de tissus du sein dérivées de ces tensions.

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