Abstract: A method for detecting a position and an operating state of an active surgical instrument. The active surgical instrument emits or influences/modifies at least one electromagnetic field in an active operating state. The method includes the steps of positioning a first sensor in order to detect the electromagnetic field emitted or influenced by the active surgical instrument in the active operating state at a known position, detecting the electromagnetic field emitted or influenced by the active surgical instrument in the active operating state by means of the first sensor, generating an output signal by means of the first sensor, the output signal indicating the detection of the electromagnetic field emitted or influenced by the active surgical instrument by means of the first sensor, and ascertaining the position and operating state of the active surgical instrument on the basis of the output signal and the known position of the first sensor.

Abstract: A method for incorporating tomographically obtained image data from a patient into a system for surgical planning and/or intraoperative navigation involves tomographic image data or image data obtained by X-ray recordings from at least one defined body area of the patient by at least one first recording appliance, wherein a first reference body having at least one surface is arranged on the patient and is recorded by the first recording appliance at the same time. The recorded image data representing the first reference body are compared with known geometric data from the first reference body in order to obtain distortion information. The recorded image data are equalized by a computation unit based on the distortion information to obtain equalized image data which have further image data from the same body area superimposed to obtain superimposed image data that is presented on a display.

Abstract: A method for presenting image data, in which an optical implement captures the position and positional information is obtained thus and, with the aid of the positional information, image data are determined and displayed or processed further. The image data to be displayed are at least in part based on virtual image data, not real image data captured directly by the optical implement. These virtual image data represent an object or body part situated in the field of view of the optical implement. Within the scope of the method, real image data are recorded by means of the optical implement, the position and/or alignment of the optical implement is captured simultaneously and positional information is derived therefrom.

Abstract: The invention relates to a method for assigning position values, detected by means of a position detection system, to a topographic image of an object or body part, which comprises the following steps: providing a topographic model of an object or body part, scanning a surface of the object or body, detecting position values during the scanning and assigning detected position values to corresponding positions in the topographic model, the detected position values being assigned to points of a virtual surface of the topographic model, which has a distance from a model surface which corresponds to a radius of a partly spherical scanning tip of a scanning instrument, by means of which the surface of the object or body part is scanned in each case.

Abstract: A method for checking situation and position data of an instrument with at least a first section having at least a first sensor and at least a second sensor. The method encompasses the metrological determination of the situation or position, or its change, of the first sensor and the second sensor, determining a variable feature of the spatial reference between the situation or position of the first sensor and the situation or position of the second sensor at least at a first point in time, at a second point in time and at a third point in time. The method further encompasses determining, by means of a criterion, whether a difference of the variable feature between a first expression at a first point in time and a second expression at a second point in time still exists at a third point in time.

Abstract: The invention relates to a device for connecting a medical instrument to a position-detecting system, the device having a localization element. The medical instrument has an instrument shaft, an instrument tip and an operating point. At least one localization element for determining position information for the device within a coordinate system of the position-detecting system can be provided on the device, the device having at least one retaining means for attaching the localization element to the medical instrument.

Abstract: A registration method and device for detecting the position and alignment of an object or body part in relation to a position detection system, the method arranging a reference sensor on the object or body part and/or on an image sensor unit, detecting the position of the reference sensor by means of the position detection system, photogrammetrically detecting a surface of the object or body part by means of the image sensor unit, producing a surface model of the object or body part on the basis of the photogrammetrically detected information, determining the position of the reference sensor in the surface model, and correlating the surface model with a coordinate system of the position detection system on the basis of the determined position of the reference sensor in the surface model and on the basis of the position of the reference sensor detected by means of the position detection system.

Abstract: A registration method and device for detecting the position and alignment of an object or body part in relation to a position detection system, the method arranging a reference sensor on the object or body part and/or on an image sensor unit, detecting the position of the reference sensor by means of the position detection system, photogrammetrically detecting a surface of the object or body part by means of the image sensor unit, producing a surface model of the object or body part on the basis of the photogrammetrically detected information, determining the position of the reference sensor in the surface model, and correlating the surface model with a coordinate system of the position detection system on the basis of the determined position of the reference sensor in the surface model and on the basis of the position of the reference sensor detected by means of the position detection system.

Abstract: The invention relates to a method for assigning position values, detected by means of a position detection system, to a topographic image of an object or body part, which comprises the following steps: providing a topographic model of an object or body part, scanning a surface of the object or body, detecting position values during the scanning and assigning detected position values to corresponding positions in the topographic model, the detected position values being assigned to points of a virtual surface of the topographic model, which has a distance from a model surface which corresponds to a radius of a partly spherical scanning tip of a scanning instrument, by means of which the surface of the object or body part is scanned in each case.

Abstract: A method for presenting image data, in which an optical implement captures the position and positional information is obtained thus and, with the aid of the positional information, image data are determined and displayed or processed further. The image data to be displayed are at least in part based on virtual image data, not real image data captured directly by the optical implement. These virtual image data represent an object or body part situated in the field of view of the optical implement. Within the scope of the method, real image data are recorded by means of the optical implement, the position and/or alignment of the optical implement is captured simultaneously and positional information is derived therefrom.

Abstract: A method for checking situation and position data of an instrument with at least a first section having at least a first sensor and at least a second sensor. The method encompasses the metrological determination of the situation or position, or its change, of the first sensor and the second sensor, determining a variable feature of the spatial reference between the situation or position of the first sensor and the situation or position of the second sensor at least at a first point in time, at a second point in time and at a third point in time. The method further encompasses determining, by means of a criterion, whether a difference of the variable feature between a first expression at a first point in time and a second expression at a second point in time still exists at a third point in time.