Devices and methods for automatically verifying, calibrating and surveying instruments for computer-assisted surgery
First Claim
1. A method for automatically verifying, calibrating or surveying an instrument, said instrument including a reference system, the method comprising:
- detecting a geometry of i) the instrument and ii) the reference system based on a scan of the instrument and the reference system;
calculating a three-dimensional model of the instrument based on the detected geometry of the instrument and the reference system;
verifying, calibrating or surveying the instrument based on the geometry of the three-dimensional model;
recording, via a camera unit, emission characteristics and/or reflection characteristics of the reference system from different angles of observation;
ascertaining from the emission characteristics and/or reflection characteristics a quality, condition or shape of the reference system or of individual markers of the reference system based on the angle of observation;
calculating an optical outline of the reference system from the ascertained quality, condition or shape of the reference system and/or of the individual markers of the reference system; and
combining the optical outline of the reference system with the ascertained quality, condition or shape of the reference system or with the individual markers of the reference system.
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Accused Products
Abstract
A device and method for automatically verifying, calibrating and surveying a navigable surgical instrument, wherein by means of a scanning device, the geometry of the instrument, in particular the shape of the functional elements (e.g., tips) and their spatial position with respect to an attachable reference system, are detected. By means of a data processing unit, a three-dimensional model of the instrument is calculated from the detected information concerning the geometry of the instrument including the reference system, wherein verification, calibration or surveying is performed with the aid of the ascertained information concerning the geometry of the instrument.
178 Citations
27 Claims
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1. A method for automatically verifying, calibrating or surveying an instrument, said instrument including a reference system, the method comprising:
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detecting a geometry of i) the instrument and ii) the reference system based on a scan of the instrument and the reference system; calculating a three-dimensional model of the instrument based on the detected geometry of the instrument and the reference system; verifying, calibrating or surveying the instrument based on the geometry of the three-dimensional model; recording, via a camera unit, emission characteristics and/or reflection characteristics of the reference system from different angles of observation; ascertaining from the emission characteristics and/or reflection characteristics a quality, condition or shape of the reference system or of individual markers of the reference system based on the angle of observation; calculating an optical outline of the reference system from the ascertained quality, condition or shape of the reference system and/or of the individual markers of the reference system; and combining the optical outline of the reference system with the ascertained quality, condition or shape of the reference system or with the individual markers of the reference system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for automatically verifying, calibrating or surveying an instrument, said instrument including a reference system, the method comprising:
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detecting a geometry of the instrument and the reference system based on a scan of the instrument and the reference system, wherein detecting comprises obtaining a first scan of the instrument at a first resolution; ascertaining a first geometric structure of the of the instrument based on the first scan; comparing the first geometric structure with geometric data stored in memory; and retrieving information stored in memory for the instrument based on the comparison; calculating a three-dimensional model of the instrument based on the detected geometry of the instrument and the reference system; and verifying, calibrating or surveying the instrument based on the geometry of the three-dimensional model. - View Dependent Claims (13, 14, 15)
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16. A method for automatically verifying, calibrating or surveying an instrument, said instrument including a reference system, the method comprising:
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detecting a geometry of the instrument and the reference system based on a scan of the instrument and the reference system; calculating a three-dimensional model of the instrument based on the detected geometry of the instrument and the reference system; and verifying, calibrating or surveying the instrument based on the geometry of the three-dimensional model, wherein surveying the instrument comprises obtaining a first scan of the instrument and reference system at a first resolution; calculating a three-dimensional model of the instrument from the first scan; providing the model on a display device; locating characteristic shapes forming the model; ascertaining a scan area based on the characteristic shapes; and obtaining a second scan of the ascertained scan area at a second resolution, wherein the second resolution is higher than the first resolution. - View Dependent Claims (17)
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18. A device for automatically verifying, calibrating or surveying an instrument, comprising:
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a scanning unit configured to detect a three-dimensional geometry of the instrument, a three-dimensional geometry of a reference system attachable on the instrument, and the geometry of the reference system relative to the geometry of the instrument, wherein the instrument can be rotated relative to the scanning unit; an infrared camera unit, wherein a spatial position of the camera unit with respect to the scanning unit is known or can be determined, and wherein the camera unit is operable to determine emission characteristics or reflection characteristics of the reference system and/or markers of the reference system; and a data processing unit communicatively coupled to the scanning unit and the infrared camera unit, the data processing unit configured to calculate a three-dimensional model of the instrument and ascertain a position of a functional element of the instrument, said calculation based on a characteristic arrangement of the reference system, based on the emission or reflection characteristics ascertain a condition, quality or a shape of the reference system or of individual markers of the reference system based on the angle of observation, calculate an optical outline of the reference system from the ascertained quality, condition or shape of the reference system and/or of the individual markers of the reference system, and combine the optical outline of the reference system with the ascertained quality, condition or shape of the reference system or with the individual markers of the reference system. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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27. A program embodied on a non-transitory computer-readable medium for automatically verifying, calibrating or surveying an instrument that includes a reference system, comprising:
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code that determines a geometry of i) the instrument and ii) the reference system, said determination based on scan data of the instrument and scan data of the reference system; code that calculates a three-dimensional model of the instrument based on the detected geometry of the instrument and the reference system; and code that verifies, calibrates or surveys the instrument based on the geometry of the three-dimensional model code that records emission characteristics and/or reflection characteristics of the reference system from different angles of observation; code that ascertains from the emission characteristics and/or reflection characteristics a quality, condition or shape of the reference system or of individual markers of the reference system based on the angle of observation; code that calculates an optical outline of the reference system from the ascertained quality, condition or shape of the reference system and/or of the individual markers of the reference system; and code that combines the optical outline of the reference system with the ascertained quality, condition or shape of the reference system or with the individual markers of the reference system.
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Specification