Abstract: The invention relates to a method for performing a movement correction when measuring a human eye, in which the eye is scanned by a measurement beam in order to obtain a set of position values of an eye structure. Scanning extends over a measurement time interval, wherein the position values are each provided with a timestamp within the measurement time interval. A surface shape and a displacement function are determined, with the displacement function representing a movement pattern during the measurement time interval, and the surface shape and the displacement function being determined in such a way that the position values are approximated by the surface shape when the surface shape is moved according to the displacement function. Moreover, the invention relates to an associated measurement system.

Abstract: The invention relates to a method for performing a movement correction when measuring a human eye, in which the eye is scanned by a measurement beam in order to obtain a set of position values of an eye structure. Scanning extends over a measurement time interval, wherein the position values are each provided with a timestamp within the measurement time interval. A surface shape and a displacement function are determined, with the displacement function representing a movement pattern during the measurement time interval, and the surface shape and the displacement function being determined in such a way that the position values are approximated by the surface shape when the surface shape is moved according to the displacement function. Moreover, the invention relates to an associated measurement system.

Abstract: An imaging device for visualizing a radioactive tracer in a human or animal body (6) comprises: a collimator plate (11) having a plurality of pinholes (111); a radiation detector (2) being arranged adjacent to a detector surface (112) of the collimator plate (11) such that radioactive radiation passing at least one of the plurality of pinholes (111) is received by the radiation detector (2); and an image processing unit (3) adapted to evaluate radiation signals obtained by the radiation detector (2) to determine a three dimensional position of at least one radiation source (61) emitting the radioactive radiation and causing the radiation signals.

Abstract: A method of controlling a surgical intervention to a bone comprises obtaining a three-dimensional image or multiplanar reconstruction of the bone, defining a position and an axis of intervention on the three-dimensional image or multiplanar reconstruction of the bone, and controlling an orientation of an intervention instrument equipped with an orientation sensor during the surgical intervention by evaluating a signal provided by the orientation sensor. The method further comprises referencing the intervention instrument with respect to the bone before the surgical intervention by arranging the intervention instrument in relation to an anatomic landmark and rotating the orientation sensor into a predefined position. The method allows for efficiently achieving correct orientation and position of the intervention instrument in bone surgical intervention. Furthermore, the method provides an efficient real-time control at comparably low efforts.

Abstract: A photoablation device includes a laser source to propagate a focused laser beam with a beam waist, wherein a radius of the beam increases from the waist in a direction of propagation of the beam; an adjusting structure to adjust an intensity of the beam; a position detector to detect a position of the source in relation to the tissue; a positioning device to move the source in relation to the tissue; and a controller. The controller is to define a photoablation zone of the beam, wherein the zone ends in a cutting face located offset from the waist in the direction of propagation; adjust the intensity of the beam at the face of the zone using the adjusting structure; and move the beam towards the tissue by using the positioning device, wherein the position of the source detected by the position detector is evaluated.

Abstract: In a method for interferometrically capturing measurement points of a region of an eye, a plurality of measurement points are captured by a measurement beam along a trajectory, wherein the same trajectory is passed over by the measurement beam in the region during at least a first iteration and a second iteration. The trajectory of the first iteration is rotated through an angle and/or displaced by a distance in relation to the trajectory of the second iteration in order to obtain a more homogeneous measurement point distribution.

Abstract: A computer assisted surgery apparatus includes a surgical instrument having an intervention member to cut tissue of a body part of a patient; a control unit arranged to control position and orientation of the intervention member in relation to the body part with regard to a predefined osteotomic line on the body part; and a tracking device arranged to track a position and orientation of the body part. The surgical instrument includes an optical monitoring system mounted in relation to the intervention member, wherein the optical monitoring system is arranged to continuously detect positions of marks applied to the body part, and the control unit is arranged to adjust position and/or orientation of the intervention member when a predefined deviation of the positions of the marks is detected. The surgery apparatus allows for application of cuts in the body part at comparably complex cutting geometries and at comparably high precision.

Abstract: Method for planning a process of cutting human or animal bone tissue. The method includes: obtaining initial data of an initial situation of the bone tissue; defining target data of a target situation of the bone tissue; and computing a cut geometry using the initial data and the target data for cutting the bone tissue apart. The cut geometry includes a structure such that the bone tissue is reassemblable at least in one degree of freedom in the target situation after being cut apart along the cut geometry. By shaping the structure of the cut geometry according to the target situation the planned cut can be provided with a particular function. Such a functional cut can geometrically define and restrict possible movements of cut apart bone portions. The functional cut can allow for comparably precisely repositioning the bone into the target position and any movement therefrom can be prevented.

Abstract: In a method for interferometrically capturing measurement points of a region of an eye, a plurality of measurement points are captured by a measurement beam along a trajectory, wherein the same trajectory is passed over by the measurement beam in the region during at least a first iteration and a second iteration. The trajectory of the first iteration is rotated through an angle and/or displaced by a distance in relation to the trajectory of the second iteration in order to obtain a more homogeneous measurement point distribution.

Abstract: A method of controlling a surgical intervention to a bone (31) comprises: obtaining a three-dimensional image or multiplanar reconstruction of the bone (31), defining a position and an axis of intervention on the three-dimensional image or multi-planar reconstruction of the bone (31), and controlling the orientation of an intervention instrument (1) equipped with an orientation sensor (2) during the surgical intervention by evaluating a signal provided by the orientation sensor (2). The method further comprises referencing the intervention instrument (1) with respect to the bone (31) before the surgical intervention by arranging the intervention instrument (1) along an anatomic landmark (32) being an edge of the bone (31) and rotating the orientation sensor (2) into a predefined position, or by arranging the intervention instrument (1) essentially perpendicular to an anatomic landmark (32) being an essentially flat surface of the bone (31) and rotating the orientation sensor (2) into a predefined position.

Abstract: Method for planning a process of cutting human or animal bone tissue. The method includes: obtaining initial data of an initial situation of the bone tissue; defining target data of a target situation of the bone tissue; and computing a cut geometry using the initial data and the target data for cutting the bone tissue apart. The cut geometry includes a structure such that the bone tissue is reassemblable in an at least in one degree of freedom in the target situation after being cut apart along the cut geometry. By shaping the structure of the cut geometry according to the target situation the planned cut can be provided with a particular function. Such a functional cut can geometrically define and restrict possible movements of cut apart bone portions. The functional cut can allow for comparably precisely repositioning the bone into the target position and any movement therefrom can be prevented.

Abstract: A computer assisted surgery apparatus (1) comprises a surgical instrument (12) having an intervention member (31) for cutting tissue of a body part (2) of a patient; a control unit (16) arranged to control a position and orientation of the intervention member of the surgical instrument (12) in relation to the body part (2) of the patient with regard to a pre-defined osteotomic line (21) on the body part (2) of the patient; and a tracking device (14) arranged to track a position and orientation of the body part (2) of the patient.

Abstract: A photoablation device (1) for photoablation of human or animal tissue (8) comprises: a laser source (2) being arranged to propagate a focused laser beam (21) with a beam waist, wherein a radius of the laser beam (21) increases from the beam in waist into a direction of propagation (213) of the laser beam (21); an adjusting structure (41, 47) being arranged for adjusting an intensity of the laser beam (21); a position detector (6) for detecting a position of the laser source (2) in relation to the tissue (8); a positioning device (3) being arranged to move the laser source (2) in relation to the tissue (8); and a controller unit (4).