System and method for aligning a medical object from

Abstract

The invention relates to a system for assisting in aligning a medical object according to a target position, comprising a light guide device configured to emit a predefined light distribution, a reflector element designed to be fixed to the medical object in a defined layout, and a projection surface configured to project light to the light guide device. Or wherein the reflector element is integrated into the medical subject in a defined layout wherein the reflector element is configured to reflect at least a portion of the light distribution in a defined manner with respect to the medical subject (MO) when illuminated with the light distribution wherein the projection surface has indicia wherein the projection surface and the light guide device are arranged in a defined positional relationship with respect to one another, wherein the projection surface can be illuminated by a reflective portion of the light distribution, and wherein the reflective portion of the light distribution precisely illuminates the marker when the medical object is aligned according to the target position. The invention also relates to a medical device and a method for aligning a medical object according to a target location.

Description

Technical Field

[0001] The present invention relates to a system for assisting in aligning a medical object according to target positioning, a medical object and a method for aligning a medical object according to target positioning. Background Art

[0002] In the context of minimally invasive interventions, in particular bone interventions, such as vertebroplasty and / or kyphoplasty, bone trocars, K-wires, rigid needles and / or screw-like tools are often introduced as surgical instruments into the bone structure of the object under examination, in particular by hammering and / or drilling. Typically, the surgical instrument must be guided to the target object through an entry point at the object under examination. To this end, it is often necessary to monitor the positioning, in particular the alignment and / or the position, of the surgical instrument relative to the object under examination. Fluoroscopy is often used for intraoperative navigation and / or guidance of the surgical instrument, for example with the aid of a C-arm X-ray machine. In most cases, no planning imaging and / or 3D imaging is performed before the operation.

[0003] For example, based on the fluorescence imaging, the positioning of the surgical instrument and / or the angle of the C-arm X-ray device can be adjusted as needed. Alternatively or additionally, the surgical instrument, in particular the longitudinal extension direction of the surgical instrument, can be detected in the fluoroscopic image and can be displayed as a graphical representation by superimposing a straight line with the aid of a display unit. By iteratively repositioning the surgical instrument under fluoroscopic imaging, the superimposed straight line can be aligned with the target object. The known methods disadvantageously lead to increased radiation exposure of the object under examination. In addition, these processes are usually time-consuming. The disadvantage of the 2D imaging used is that the angle of the C-arm must be changed regularly so that the "off-plane" tilt of the cannula needle can be excluded. "Off-plane" refers to the changing part of the direction vector and / or orientation vector of the instrument axis that is collinear or parallel to the projection direction of the C-arm. For thin instruments, especially needle-shaped or bolt-shaped instruments, this change in the off-plane direction cannot be detected in the 2D X-ray projection. For example, if the progress view is not switched to a second, especially orthogonal progress view with a different angle of the C-arm, this change in direction cannot be detected on the C-arm. For the surgical workflow, too frequent changes in angles are a great disadvantage. Summary of the invention

[0004] The object of the present invention is therefore to achieve a low-X-ray-dose and time-efficient alignment of a medical object relative to an examination object.

[0005] According to the invention, this object is achieved by a system for assisting in the alignment of a medical object according to target localization, a medical device and a method for the alignment of a medical object according to target localization.

[0006] In a first aspect, the present invention relates to a system for assisting in aligning a medical object according to target positioning. The system comprises a light guide, a reflector element and a projection surface. The light guide is designed to emit a predetermined light distribution. The reflector element is designed to be fixed to the medical object in a defined layout. Optionally, the reflector element is integrated into the medical object in a defined layout. In addition, the reflector element is designed to reflect at least a part of the light distribution in a defined manner relative to the medical object when illuminated with the light distribution. The projection surface has a marking. In addition, the projection surface and the light guide are arranged in a defined positional relationship relative to each other. Here, the projection surface can be illuminated by the reflected part of the light distribution. In addition, when the medical object is aligned according to the target positioning, the reflected part of the light distribution accurately illuminates the marking.

[0007] The medical object can be a surgical instrument, such as a needle, in particular a puncture needle, and / or a drill, and / or a diagnostic instrument, such as an endoscope, in particular a laparoscope, and / or a catheter and / or a trocar. Advantageously, the medical object can be at least partially, in particular completely rigid and elongated, in particular rod-shaped and / or needle-shaped. Advantageously, in the operating state of the device, the medical object, in particular the distal end portion of the medical object can be arranged on or in the examination object. In particular, in the operating state of the device, the medical object can be at least partially arranged on or in the examination object.

[0008] The light guide device may advantageously comprise a light source, such as a laser light source, which is configured to emit a predefined light distribution. To this end, the light guide device may comprise, for example, an optical film. Advantageously, the light guide device may emit a light distribution in an operating state of the device.

[0009] The reflector element can be fixed in a defined positional relationship, in particular in a defined spatial relative position and / or relative orientation and / or relative posture, in particular fixed to a medical object, in particular the proximal portion of the medical object. In particular, the reflector element can be detachably fixed to the medical object in a defined positional relationship. To this end, the reflector element and / or the medical object can have a fixing element, such as a clamping device and / or an insertion device and / or a magnetic retainer. Optionally, the reflector element can be integrated into the medical object, in particular at the proximal portion of the medical object, for example on the surface of the medical object. The reflector element can include an optical reflector, such as a reflector. The reflector can be planar or curved, for example concave or convex. The reflector element can be advantageously arranged on the medical object so that the reflector element, in particular the reflector, can be illuminated by the light distribution.

[0010] Advantageously, the reflector element, in particular the reflector, can be designed to reflect at least a portion of the light distribution by definition relative to the medical object when illuminated with the light distribution. In an operating state of the system, the arrangement of the medical object and the reflector element can advantageously be positioned so that the defined light distribution illuminates the reflector element, in particular the reflector. Advantageously, in an operating state of the system, the light distribution can illuminate the reflector element at an angle of incidence relative to a mirror axis of the reflector. The reflector can be designed to reflect at least a portion of the predefined light distribution at an angle of incidence relative to the mirror axis. Due to the defined arrangement of the reflector element relative to the medical object, the mirror axis of the reflector can have a defined positional relationship relative to the medical object, in particular relative to a longitudinal extension axis of the medical object.

[0011] The system can also advantageously have a flat or curved projection surface. The projection surface can include, for example, a surface of a medical device and / or an object under examination, in particular a housing surface. The projection surface can advantageously have at least one marking. The at least one marking can be designed as a structural and / or anatomical element on the projection surface, such as a protrusion or a groove, and / or a graphic element, such as an imprint.

[0012] Advantageously, the projection surface, in particular the at least one marking and the light-guiding device can be arranged in a defined positional relationship relative to one another, in particular in a defined spatial relative position and / or relative orientation and / or relative attitude. In this way, it can be advantageously ensured that when the medical object is aligned, in particular with the reflector element according to the target orientation, the reflected part of the light distribution precisely illuminates the marking on the projection surface corresponding to the target orientation. The target orientation can include a spatial target position and / or a target orientation and / or a target attitude of the medical object.

[0013] The proposed system may advantageously allow a low X-ray dose and time efficient alignment of a medical object relative to an examination object.In particular, out-of-plane changes of the medical object's orientation may be visually known.

[0014] In another advantageous embodiment of the proposed system, the system can also comprise a medical imaging device. Here, the light guide device and the projection surface can be arranged in a defined positional relationship relative to one another on the medical imaging device and / or at least partially integrated into the medical imaging device.

[0015] The medical imaging device may include a medical X-ray device, in particular a medical C-arm X-ray device and / or a cone-beam CT (CBCT) device and / or a computer tomography device (CT device) and / or a magnetic resonance tomography device (MRI device) and / or a positron emission tomography device (PET device) and / or an ultrasound device. Advantageously, the imaging device may be designed to record and provide image data of an examination object and a medical object.

[0016] Advantageously, the light guide may be arranged on the medical imaging device (eg source or detector) and / or integrated into the imaging device. Furthermore, the projection surface may be arranged on the medical imaging device and / or at least partially integrated into the imaging device, such as a housing of the imaging device.

[0017] Thus, there can advantageously be an inherent registration between the coordinate system of the light-guiding device and the coordinate system of the imaging device, whereby a combination of image-guided alignment and alignment by means of the projected light distribution can be achieved particularly intuitively.

[0018] In another advantageous embodiment of the proposed system, the medical imaging device can include a movably mounted X-ray source and an X-ray detector. Here, the projection surface can be a surface of the X-ray detector facing the X-ray source.

[0019] Advantageously, an imaging device, in particular a medical X-ray device, can have an X-ray source and an X-ray detector in a defined arrangement relative to one another, for example on a C-arm. In this case, the defined arrangement of the X-ray source and the X-ray detector can be mounted movably, for example rotatably and / or translatably.

[0020] The X-ray detector may have an X-ray sensitive surface for detecting X-rays, in particular for detecting X-rays emitted by an X-ray source. Advantageously, the projection surface may be arranged on the same side of the X-ray detector, in particular the same face and / or surface as the X-ray sensitive surface. In particular, the projection surface may be a housing surface of the X-ray detector, which is arranged in front of the X-ray sensitive surface of the X-ray detector along the beam path from the X-ray source to the X-ray detector. In particular, the projection surface may be a surface of the X-ray detector facing the X-ray source, in particular a housing surface.

[0021] The proposed embodiments may advantageously allow detection of a change in the out-of-plane direction of the medical object without changing the angle, in particular without changing the projection direction between the X-ray source and the X-ray detector. Therefore, in the case of a change in the out-of-plane direction, in particular detected visually, a recording with the rotation angle, in particular the projection direction, may be required. Alternatively, the change in the out-of-plane direction may be identified directly in the image data recorded by the X-ray device at the original angle.

[0022] In a further advantageous embodiment of the proposed system, the X-ray source and the X-ray detector may be movably supported around a common isocenter. Furthermore, a predefined light distribution may illuminate the isocenter.

[0023] Advantageously, the X-ray source and the X-ray detector, in particular a defined arrangement of the X-ray source and the X-ray detector, can be movably, in particular rotatably, supported around an isocenter, in particular a rotation center. Furthermore, the light guide can be designed to emit a defined light distribution, such that the isocenter of the medical imaging device can be illuminated by the light distribution. In particular, the light guide can emit a light distribution in an operating state of the system, such that the isocenter can be illuminated by the light distribution when the illumination is not obstructed.

[0024] In this way, it can be advantageously achieved that at least a part of the medical object is arranged at the isocenter. This can advantageously allow the part of the medical object to be imaged from a plurality of projection directions, in particular angles, by means of an X-ray device. The part of the medical object arranged in the isocenter can also be imaged in the center of a 2D X-ray image that can be recorded by means of an X-ray device. In this way, the spatial distance between the medical object, in particular the part of the medical object arranged at the isocenter, and the X-ray detector and / or the X-ray source can be determined. Thus, for example, when aligning according to target positioning, an improved assumption can be made about the position of the center of rotation of the tilt of the medical object.

[0025] In a further advantageous embodiment of the proposed system, the predefined light distribution may project a geometric shape.

[0026] Advantageously, the light guide device can be designed to project a light pattern having a geometric shape by means of a predefined light distribution. Here, when illuminated with the light distribution, the reflector element can reflect at least a part of the projected light pattern in a defined manner relative to the medical object. Here, the reflector element can project the reflected part of the light pattern onto the projection surface. The geometric shape can include, for example, a line and / or a point and / or a point cloud and / or a cross and / or a circle and / or a polygon.

[0027] Thus, the recognition of whether the reflected part of the light distribution illuminates the predetermined marking can be advantageously improved. In addition, it is thereby possible to improve the recognition of whether the medical object is aligned according to the target positioning.

[0028] In another advantageous embodiment of the proposed system, the light guide can be designed to emit another predefined light distribution for illuminating the projection surface, which light distribution projects another light pattern onto the projection surface in the operating state of the system. Here, the projection of the other light pattern onto the projection surface can at least partially, in particular completely, form the marking.

[0029] The further predefined light distribution can in particular have all the properties and features of the predefined light distribution and vice versa. The further light pattern can advantageously comprise another geometric shape, for example a line and / or a point and / or a point cloud and / or a cross and / or a circle and / or a polygon. Advantageously, the projection of the light pattern, in particular the geometric shape, onto the projection surface can partially, in particular as a supplement to the marking of the anatomic and / or anatomical and / or graphic element, or completely form the marking.

[0030] The proposed embodiment can advantageously enable a flexible adaptation of the positioning and / or features (particularly the shape) of the marking on the projection surface. In this way, the medical object can be flexibly aligned according to the target positioning predetermined in each case.

[0031] In another advantageous embodiment of the proposed system, the projection surface can have a plurality of markings, each marking being used for a potential target location of the medical object. Here, when the medical object is aligned according to the corresponding target location, the reflected part of the light distribution can precisely illuminate the corresponding marking.

[0032] A plurality of markers can be constructed to be different or identical. In addition, a plurality of markers can each have optically distinguishable properties, such as color coding and / or black and white coding and / or surface properties, such as reflectivity and / or fluorescence and / or contour. Advantageously, a plurality of markers can be uniquely identified based on optically distinguishable properties. Advantageously, each marker can accurately correspond to a potential, in particular predefined target location of the medical object in each case, in particular a target position and / or a target orientation and / or a target posture. The correspondence advantageously consists in that, when the medical object is aligned according to the corresponding target location, a corresponding marker among the plurality of markers is accurately illuminated by the reflected part of the light distribution.

[0033] The proposed embodiments may allow for a flexible alignment of the medical object according to a target location predetermined in each case.

[0034] In another advantageous embodiment of the proposed system, a plurality of markings may form a scale.

[0035] Advantageously, the plurality of markings can be arranged on the projection surface in a defined layout, for example equidistant or at different distances from each other. Furthermore, the plurality of markings can have a coding, for example a color coding and / or a textual description, for example angle information. In the case where the markings are formed as a straight line, the markings can advantageously be arranged parallel to each other. Furthermore, the plurality of markings can have a reference marking, relative to which the remaining markings form a deviation scale.

[0036] The proposed embodiments may allow intuitive alignment of a medical object according to a corresponding target position and qualitatively and / or quantitatively detecting deviations from a reference position, in particular deviations corresponding to reference markings.

[0037] In a further advantageous embodiment of the proposed system, the reflector elements may be designed to be movable along the longitudinal extension of the medical object and to be detachably fixed to the medical object in a defined arrangement.

[0038] Advantageously, the reflector element can be translated along the longitudinal extension direction of the medical object and / or rotated about the longitudinal extension direction.In addition, the reflector element and / or the medical object can have locking elements, which allow the reflector element to be detachably fixed to the medical object in a defined arrangement.

[0039] This enables a simple (in particular subsequent) and situation-adapted arrangement of the reflector elements in a defined arrangement on the medical object.

[0040] In a second aspect, the invention relates to a medical device comprising a medical object and a reflector element. The reflector element is arranged on the medical object in a defined layout or integrated into the medical object in a defined layout. Here, the reflector element is designed to reflect at least a part of the light distribution in a defined manner relative to the medical object when illuminated with the light distribution.

[0041] The advantages of the proposed medical object are substantially the same as the advantages of the proposed system. Features, advantages or alternative embodiments mentioned here can also be transferred to other claimed subjects and vice versa.

[0042] In another advantageous embodiment of the proposed medical device, the medical object can have a distal end and a proximal end portion. Here, the distal end portion can be designed to be arranged at least partially in the examination object. In addition, when the distal end portion is arranged inside the examination object, the proximal end portion can be arranged outside the examination object. In addition, the reflector element can be arranged on the proximal end portion.

[0043] The proximal portion may include a spatial portion of the medical object, which faces away from the examination object, in particular toward a medical operator for manipulating the medical object, in particular along the longitudinal extension direction of the medical object. In addition, the distal portion may include a spatial portion of the medical object, which faces the examination object, in particular away from the medical operator for manipulating the medical object, in particular along the longitudinal extension direction of the medical object.

[0044] In a further advantageous embodiment of the proposed medical device, the reflector elements can be designed to be movable along the longitudinal extension of the medical object and to be detachably fixed to the medical object in a defined arrangement.

[0045] In a third aspect, the invention relates to a method for aligning a medical object according to a target positioning. In a first step a), a predetermined light distribution is emitted by means of a light guide. Here, the light distribution illuminates a reflector element, which is fixed to the medical object in a defined layout or integrated into the medical object in a defined layout. Here, the reflector element reflects at least a part of the light distribution in a defined manner relative to the medical object. In a second step b), it is checked whether a predetermined mark on the projection surface is illuminated by the reflected part of the light distribution. The projection surface and the light guide are arranged in a defined positional relationship relative to each other. If not, the medical object is repositioned and step b) is repeated.

[0046] The check in step b) can be performed manually, for example by a medical operator, or automatically, for example with the aid of an optical sensor and / or a camera. If it is determined during the check in step b) that the predetermined marking on the projection surface is illuminated by the reflective part of the light distribution, the method can end at this point. If it is determined during the check in step b) that the predetermined marking on the projection surface is not illuminated by the reflective part of the light distribution, the medical object can advantageously be repositioned, in particular rotated and / or translated, and step b) can be repeated. Due to the repositioning of the medical object, the relative positioning of the reflector element with respect to the projection surface and the light-guiding device can change. Advantageously, the repositioning of the medical object and step b) can be repeated until the predetermined marking on the projection surface is illuminated by the reflective part of the light distribution.

[0047] The advantages of the proposed method correspond substantially to the advantages of the proposed system. Features, advantages or alternative embodiments mentioned here can likewise be transferred to other claimed subjects and vice versa.

[0048] In a further advantageous embodiment of the proposed method, the predefined light distribution can project a geometric shape.

[0049] In another advantageous embodiment of the proposed method, the light guide emits another predefined light distribution for illuminating the projection surface, which projects another light pattern onto the projection surface. Furthermore, the projection of the other light pattern onto the projection surface can at least partially, in particular completely, form a marking. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Exemplary embodiments of the present invention are shown in the drawings and are described in more detail below. In different drawings, the same reference numerals are used for the same features. In the drawings:

[0051] Figures 1 to 3 are schematic diagrams of various embodiments of the proposed system;

[0052] Figure 4 and Figure 5are schematic diagrams of various embodiments of markings on a projection surface,

[0053] Figure 6 is a schematic diagram of the proposed medical object;

[0054] Figure 7 and Figure 8 are schematic diagrams of various embodiments of the proposed method for aligning a medical object according to target positioning. DETAILED DESCRIPTION

[0055] Figure 1 A schematic diagram of an advantageous embodiment of the proposed system for assisting in aligning a medical object MO according to a target positioning is shown. Here, the system may include a light guide device LFE, a reflector element RE and a projection surface PF. The light guide device LFE can be designed to emit a predefined light distribution LV. The reflector element RE can be designed to be fixed to the medical object MO in a defined layout. Optionally, the reflector element RE can be integrated into the medical object MO in a defined positional relationship. In addition, the reflector element RE can be designed to reflect at least a part of the light distribution RLV in a defined manner relative to the medical object MO when illuminated with the light distribution LV. The projection surface PF can have a marking MK. In addition, the projection surface PF and the light guide device LFE can be arranged in a defined positional relationship relative to each other. The projection surface PF can be illuminated by the reflected part of the light distribution RLV. Here, when the medical object MO is aligned according to the target positioning, the reflected part of the light distribution RLV can accurately illuminate the marking MK.

[0056] In an operating state of the system, the medical object MO, in particular the distal part of the medical object MO, can be at least partially arranged on or in the examination object 31. Target positioning can advantageously predetermine a spatial target position and / or a target alignment and / or a target posture of the medical object MO relative to the examination object.

[0057] Advantageously, the predefined light distribution LV can project a geometric shape.

[0058] The reflector element RE may advantageously be designed to be movable along the longitudinal extension of the medical object MO and to be detachably fixed to the medical object MO in a defined arrangement.

[0059] Figure 2A schematic diagram of another advantageous embodiment of the proposed system for supporting alignment of a medical object MO according to target positioning is shown. Here, the system can also include a medical imaging device, in particular a medical C-arm X-ray device. The X-ray device can include an X-ray source and an X-ray detector, which are mounted on a common C-arm in a defined layout so as to be movable around the isocenter IZ. Advantageously, the light guide device LFE and the projection plane PF can be arranged on the medical imaging device in a defined positional relationship relative to each other and / or at least partially integrated into the medical imaging device. In particular, the light guide device LFE can be arranged on the X-ray detector 34. Furthermore, the projection plane PF can be a surface of the X-ray detector facing the X-ray source. Furthermore, a predefined light distribution LV can illuminate the isocenter IZ.

[0060] In order to record image data of the examination object, the providing unit PRVS can send a signal to the X-ray source. The X-ray source 33 can then emit an X-ray beam. When the X-ray beam hits the surface of the detector 34 after interacting with the examination object 31, the detector 34 can send a signal 21 to the providing unit PRVS. The providing unit PRVS can acquire an image data set based on the signal 21.

[0061] Advantageously, the system may further comprise an input unit and a display unit. The input unit 42 may comprise, for example, a keyboard and / or a pointing device and / or a detection unit, such as a voice detection unit and / or a gesture detection unit. Furthermore, the display unit 41 may comprise, for example, a monitor and / or a display and / or a projector. The input unit 42 may preferably be integrated into the display unit 41, for example in the case of a capacitive and / or resistive input display. The input unit 42 may advantageously be designed to detect user input. To this end, the input unit 42 may, for example, send a signal 26 to the providing unit PRVS. The providing unit PRVS may be designed to control the emission of the light distribution LV, in particular based on a user input, for example by means of a signal CS. Furthermore, the providing unit PRVS may be configured to control the X-ray device based on the user input to record image data.

[0062] The display unit 41 may advantageously be designed to display target positioning and / or workflow prompts and / or graphical representations of the medical image data. To this end, the providing unit PRVS may send a signal 25 to the display unit 41 .

[0063] Figure 3A schematic diagram of another advantageous embodiment of the proposed system for assisting in the alignment of a medical object MO according to target positioning is shown. Here, the light guide device LFE can be designed to emit another predefined light distribution FLV for illuminating the projection surface PF, which in the operating state of the system projects another light pattern onto the projection surface PF. Here, the projection of the other light pattern onto the projection surface can at least partially, in particular completely, form the marking MK.

[0064] Figure 4 A schematic diagram of a marking MK formed on the projection plane PF by means of a further light pattern FLV is shown.

[0065] Figure 5 A schematic diagram of a plurality of markers MKR, MK1 and MK2 for each potential target position of a medical object MO on the projection plane PF is shown. Here, when the medical object MO is aligned according to the corresponding target position, the reflected part of the light distribution RLV can precisely illuminate the corresponding marker. Figure 5 As shown, the light guide device LFE can be arranged on the projection plane PF, in particular on the X-ray detector 34. In this case, the light guide device LFE can include a deflection element AE, for example a mirror, which is designed to deflect a predefined light distribution LV in a defined manner.

[0066] Multiple markers MKR, MK1 and MK2 can be different or the same. In addition, multiple markers MKR, MK1 and MK2 can each have optically distinguishable characteristics, such as color coding. Advantageously, multiple markers MKR, MK1 and MK2 can be uniquely identified based on optically distinguishable characteristics. Advantageously, each of the markers MKR, MK1 and MK2 can accurately correspond to a potential, especially predefined target positioning of the medical object MO. The correspondence is advantageous in that when the medical object MO is aligned according to the corresponding target positioning, the corresponding markers in the multiple markers MKR, MK1 and MK2 are accurately illuminated by the reflective part of the light distribution RLV. Advantageously, multiple markers MKR, MK1 and MK2 can be arranged on the projection surface PF in a defined layout, such as equidistant or with different distances from each other. In the case where the markers MKR, MK1 and MK2 are formed as a straight line, the markers can be advantageously arranged parallel to each other. In addition, multiple markers can have a reference marker MKR, relative to which the remaining markers MK1 and MK2 form a scale of deviation.

[0067] Figure 6A schematic diagram of the proposed medical device comprising a medical object MO and a reflector element RE is shown. The reflector element RE can be integrated into the medical object in a defined layout or can be arranged on the medical object MO in a defined layout. In addition, the reflector element RE can be designed to reflect at least a part of the light distribution in a defined manner relative to the medical object MO when illuminated with the light distribution LV. Advantageously, the medical object can have a distal and a proximal part. Here, the distal part can be designed to be at least partially arranged in the examination object. In addition, when the distal part is arranged inside the examination object, the proximal part can be arranged outside the examination object. The reflective element RE can be arranged at the proximal part. In particular, the reflector element RE can be designed to move along the longitudinal extension direction of the medical object MO and to be detachably fixed to the medical object MO in a defined layout, for example by means of a locking element FE.

[0068] Figure 7 A schematic diagram of an advantageous embodiment of the proposed method for aligning a medical object MO according to a target positioning is shown. In a first step, a predetermined light distribution LV can be emitted PROJ-LV by means of a light guide device LFE. Here, the light distribution LV can illuminate a reflector element RE, which is fixed to the medical object MO in a defined layout or integrated into the medical object MO in a defined layout. In addition, the reflector element RE can reflect at least a part of the light distribution RLV in a defined manner relative to the medical object MO. In a further step, a check CHK can be made: whether a predetermined mark on the projection surface PF is illuminated by the reflected part of the light distribution RLV. The projection surface PF and the light guide device LFE can be arranged in a defined positional relationship relative to each other. If no N, the RPOS-MO medical object MO can be repositioned and the check CHK can be performed repeatedly.

[0069] The schematic diagrams contained in the described figures do not represent any scale or size relationships.

[0070] Finally, it is pointed out again that the method described in detail above and the device shown are only exemplary embodiments, which can be modified in various ways by a person skilled in the art without departing from the scope of the invention. In addition, the use of the indefinite article "a" or "an" does not exclude that the feature in question may also be present in plurality. Similarly, the terms "unit" and "element" do not exclude that the component in question consists of several cooperating subcomponents, which may also be spatially distributed.

[0071] In the context of the present application, the expression "based on" can be understood in particular as the expression "using". In particular, a formula according to which a first feature is generated (alternatively: obtained, determined, etc.) based on a second feature does not exclude the possibility of generating the first feature (alternatively: obtained, determined, etc.) based on a third feature.

Claims

1. A system for assisting in aligning a medical object (MO) according to a target location, comprising a light guide (LFE), a reflector element (RE) and a projection surface (PF), in, the light guide (LFE) being configured to emit (PROJ-LV) a predefined light distribution (LV), wherein the reflector elements (RE) are configured to be fixed to the medical object (MO) in a defined layout, or wherein the reflector elements (RE) are integrated into the medical object (MO) in a defined layout, wherein the reflector element (RE) is configured to reflect at least a part of the light distribution (LV) in a defined manner relative to the medical object (MO) when illuminated with the light distribution (LV), wherein the projection surface (PF) has a marking (MK), wherein the projection surface (PF) and the light guide (LFE) are arranged in a defined positional relationship relative to each other, wherein the projection surface can be illuminated by a reflected part of the light distribution (RLV), Therein, when the medical object (MO) is aligned according to the targeting, the reflected part of the light distribution (RLV) precisely illuminates the marking (MK).

2. The system according to claim 1, wherein: The system further comprises a medical imaging device, wherein the light guide (LFE) and the projection surface (PF) are arranged in a defined positional relationship relative to one another on the medical imaging device and / or are at least partially integrated in the medical imaging device.

3. The system according to claim 2, wherein: The medical imaging device comprises a movably supported X-ray source (33) and an X-ray detector (34), wherein a projection surface (PF) is a surface of the X-ray detector (34) facing the X-ray source (33).

4. The system according to claim 3, wherein: The X-ray source (33) and the X-ray detector (34) are movably mounted around a common isocenter (IZ), wherein the predetermined light distribution (LV) illuminates the isocenter (IZ).

5. A system according to any one of the preceding claims, wherein: The predetermined light distribution (LV) projects a geometric shape.

6. A system according to any one of the preceding claims, wherein: The light guide device (LFE) is configured to emit another predefined light distribution (FLV) for illuminating the projection surface (PF), and the other predefined light distribution (FLV) projects another light pattern (PROJ-FLV) onto the projection surface (PF) in an operating state of the system, wherein the projection of the other light pattern on the projection surface (PF) at least partially, in particular completely, forms the mark (MK).

7. A system according to any one of the preceding claims, wherein: The projection surface (PF) has a plurality of markings (MK1, MK2, MKR) for potential target positioning of the medical object (MO), wherein when the medical object (MO) is aligned according to the corresponding target positioning, the reflected part of the light distribution (RLV) precisely illuminates the corresponding marking.

8. The system according to claim 7, wherein: The plurality of marks (MK1, MK2, MKR) form a scale.

9. A system according to any one of the preceding claims, wherein: The reflector elements (RE) are configured to be movable along a longitudinal extension of the medical object (MO) and to be detachably fixed to the medical object (MO) in the defined arrangement.

10. A medical device comprising a medical object (MO) and a reflector element (RE), in, The reflector elements (RE) are arranged in a defined arrangement on the medical object (MO) or are integrated into the medical object (MO) in the defined arrangement, Therein, the reflector element (RE) is configured to reflect at least a portion of the light distribution (LV) in a defined manner relative to the medical object when illuminated with the light distribution (LV).

11. The medical device according to claim 10, wherein: The medical object (MO) has a distal portion and a proximal portion, wherein the distal portion is designed to be arranged at least partially in the examination object (31), Wherein, when the distal part is arranged inside the examination object (31), the proximal part is adapted to be arranged outside the examination object (31), wherein the reflector element (RE) is arranged on the proximal part.

12. The medical device according to claim 10 or 11, wherein: The reflector elements (RE) are configured to be movable along a longitudinal extension of the medical object (MO) and to be detachably fixed to the medical object (MO) in the defined arrangement.

13. A method for aligning a medical object (MO) according to target positioning, comprising: a) emitting (PROJ-LV) a predefined light distribution (LV) by means of a light guide (LFE), wherein the light distribution (LV) illuminates a reflector element (RE) which is fastened to the medical object (MO) in a defined arrangement or is integrated into the medical object (MO) in a defined arrangement, wherein the reflector element (RE) reflects at least a part of the light distribution in a defined manner relative to the medical object (MO), b) checking (CHK) whether a predetermined mark (MK) on the projection surface (PF) is illuminated by the reflecting part (RLV) of the light distribution (RLV), wherein the projection surface (PF) and the light guide (LFE) are arranged in a defined positional relationship relative to each other, If the answer is no (N), the medical object (MO) is repositioned (RPOS-MO) and step b) is repeated.

14. The method according to claim 13, wherein: The predefined light distribution (LV) projection geometry.

15. The method according to claim 13 or 14, wherein: The light guide (LFE) emits another predefined light distribution (FLV) for illuminating the projection surface (PF), and the other predefined light distribution (FLV) projects another light pattern onto the projection surface (PF), wherein the projection of the other light pattern onto the projection surface (PF) at least partially, in particular completely, forms the marking (MK).

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