Systems and methods for measuring and characterizing interior surfaces of luminal structures
First Claim
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1. A method for generating a three-dimensional digital topographic model of a luminal surfaces of a body lumen, said method comprising:
- scanning a light pattern with a known geometry comprising at least one ring which circumscribes a cross-section of the lumen on the luminal surface from at least one illumination source over a number of first locations along a longitudinal axis within the lumen to reflect a geometric pattern of light from the luminal surface from each of said first locations;
detecting at least a portion of the reflected light pattern over the full cross-section circumscribing the body lumen with at least one light sensor at a number of second locations within the lumen, wherein said second locations are spaced-apart axially along the longitudinal axis from the first location;
determining an angle of the detected portion of the reflected light pattern with respect to the longitudinal axis using the light sensor; and
generating the three-dimensional digital topographic model of the luminal surface of the body lumen by triangulating the detected portion of the reflected light pattern from the projection and detection locationswherein triangulating comprises (1) determining a distance between the illumination source and the light sensor, and (2) calculating the position of the detected portion of the reflected light pattern based upon the angle of the reflected light pattern with respect to the longitudinal axis.
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Abstract
A digital topographic model of the luminal surface is generated by projecting an optical pattern on the luminal surface from the first location within the lumen. At least a portion of the projected pattern is detected from a second location within the lumen which is based apart from the first location. The dimensions of the luminal wall can be measured by triangulation in order to produce the digital topographic model of the body lumen.
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28 Claims
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1. A method for generating a three-dimensional digital topographic model of a luminal surfaces of a body lumen, said method comprising:
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scanning a light pattern with a known geometry comprising at least one ring which circumscribes a cross-section of the lumen on the luminal surface from at least one illumination source over a number of first locations along a longitudinal axis within the lumen to reflect a geometric pattern of light from the luminal surface from each of said first locations; detecting at least a portion of the reflected light pattern over the full cross-section circumscribing the body lumen with at least one light sensor at a number of second locations within the lumen, wherein said second locations are spaced-apart axially along the longitudinal axis from the first location; determining an angle of the detected portion of the reflected light pattern with respect to the longitudinal axis using the light sensor; and generating the three-dimensional digital topographic model of the luminal surface of the body lumen by triangulating the detected portion of the reflected light pattern from the projection and detection locations wherein triangulating comprises (1) determining a distance between the illumination source and the light sensor, and (2) calculating the position of the detected portion of the reflected light pattern based upon the angle of the reflected light pattern with respect to the longitudinal axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification