Optical surgical system having light sensor on its jaw and method for determining vessel size with angular distortion compensation
Inventors
Chaturvedi, Amal • Subramanian, Hariharan
Assignees
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Publication Number
US-11589852-B2
Publication Date
2023-02-28
Expiration Date
Abstract
A system and method for compensation of angular distortions in a system utilizing light emitters and light sensors disposed on non-parallel jaws may include determining a first point at a first side of a region of interest and a second point at a second side of the region of interest, determining a linear curve including the first and second points, and utilizing the linear curve to remove the angular distortion from the region of interest between the first and second points, A system and method for compensation of angular distortions may alternatively include modeling a non-pulsatile illumination pattern according to the intensities of individual emitters, comparing the pattern according to the model against a non-pulsatile illumination pattern detected using the light sensors, and varying the intensities of the individual emitters based on the comparison until angular distortion has been removed.
Core Innovation
The optical surgical system compensates for angular distortions during optical vessel sizing using a plurality of light emitters and a plurality of light sensors arranged on opposing non-parallel instrument jaws. The first and second surfaces are disposed on a pair of non-parallel jaws, with the light emitters disposed at a working end on the first surface and the light sensors disposed at the working end on the second surface opposing the first surface. A controller determines an illumination pattern from a non-pulsatile component of the signals received from the plurality of light sensors.
Within the illumination pattern, the controller determines a region of interest and identifies a first point at a first side of the region of interest and a second point at a second side of the region of interest. The controller determines a linear curve for the region of interest including the first and second points disposed about the region of interest. The controller utilizes the linear curve to remove the angular distortion from the region of interest between the first and second points.
Angular distortion compensation is supported by deriving an illumination-pattern correction based on point-based linear curve modeling of the non-pulsatile illumination pattern. The described approach relates the region of interest to an absorption profile and distinguishes pulsatile and non-pulsatile components to estimate vessel inner diameter and resting outer diameter. The system includes DC-profile processing such as region of interest detection and mirroring to enable diameter determination.
Claims Coverage
The provided claim set includes one independent claim defining an optical surgical system and controller-based angular-distortion compensation using a linear curve through two points around a region of interest, derived from a non-pulsatile illumination pattern. Dependent claims refine the region of interest, specify linear-curve parameterization, compensation computation, scope of correction, and adjustable non-parallel jaws.
Optical surgical system with angular distortion compensation using non-parallel jaws
An optical surgical system comprising a plurality of light emitters disposed at a working end on a first surface and a plurality of light sensors disposed at the working end on a second surface opposing the first surface, the first and second surfaces disposed on a pair of non-parallel jaws, and a controller configured to determine an illumination pattern from a non-pulsatile component of signals from the plurality of light sensors, determine a first point and a second point at respective sides of a region of interest within the illumination pattern, determine a linear curve for the region of interest including the first and second points, and utilize the linear curve to remove angular distortion from the region of interest between the first and second points.
The core inventive concept is deriving an illumination-pattern correction from a non-pulsatile component and removing angular distortion via a linear curve through two points about a region of interest, with refinements that specify the region of interest as an absorption profile, parameterize the linear curve using slope and offset, extend correction to the entire illumination pattern, and provide adjustable non-parallel jaws.
Stated Advantages
Compensates for angular distortions in a region of interest within an illumination pattern.
Enables vessel size determination using illumination-pattern processing that distinguishes non-pulsatile and pulsatile components.
Produces correlation between determined vessel diameters and conventional measurements in porcine arteries.
Documented Applications
Vessel sizing during optical surgical procedures by determining vessel inner diameter and resting outer diameter using DC-profile processing and angular distortion compensation.
Porcine artery experiments, including correlation of determined vessel diameters with conventional measurements in porcine arteries.
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