Telecentric scale projection system for real-time in-situ surgical metrology

摘要

TELECENTRIC SCALE PROJECTION SYSTEM FOR REAL-TIME IN-SITU SURGICAL METROLOGY A system and method for determining endoscopic dimensional measurements including a projector assembly (110) comprising a light source for projecting light through a telecentric lens (135) and into a surgical site, and a mask (140) coupled to the projector assembly. Light projected from the light source projects through the mask (140). The projected light through the mask (140) may be a collimated pattern which does not significantly change in size as a function of the distance to a projected plane. The projected light patterns may include multiple wavelengths of light for measurements of different features of tissue and may be produced using a laser in conjunction with a light shaping optical diffuser, or using a light emitting diode in conjunction with a light shaping optical diffuser, or using a spatial filter. The projected light patterns may take the form of concentric rings with each ring representing a radius of a given dimension. ,-~100 "iP" ------------- - 110 135 140