Method for operating a diaphragm device of an X-ray device and X-ray device

Abstract

Method for operating a diaphragm device (5) of a medical X-ray imaging device (1), which has an X-ray emitter (4) to which the diaphragm device (5) is assigned, an X-ray detector (7), a patient table (6) for supporting a patient (22) to be admitted, and a wireless, handheld operating device (9) having a touchscreen (11), wherein a display (23) visualizing the current setting of the diaphragm device (5) is generated on the touchscreen (11), and the diaphragm device (5) is set according to operating data describing a manipulation of display elements of the display (23), characterized in thatthat position information describing the position (21) and / or orientation of the operator is determined from sensor data of at least one sensor and is used to select a perspective that at least approximately corresponds to the operator's viewing angle on the patient table (6) for the three-dimensional visualization (23) showing the radiation field with the current aperture settings.

Description

[0001] The invention relates to a method for operating a diaphragm device of a medical X-ray imaging device, which comprises an X-ray tube to which the diaphragm device is assigned, an X-ray detector, a patient table for supporting a patient to be scanned, and a wireless, handheld operating device with a touchscreen. A display visualizing the current setting of the diaphragm device is generated on the touchscreen, and the diaphragm device is adjusted according to operating data describing a manipulation of display elements of the display. The invention also relates to an X-ray device.

[0002] In medical X-ray imaging, it is now common practice to use aperture devices to limit the radiation field of the X-ray tube according to the desired image acquisition. This serves both to prevent unnecessary radiation exposure of the patient and to prevent overexposure of the X-ray image when there is no X-ray attenuation due to air gaps.

[0003] A corresponding aperture device, usually located downstream of the X-ray tube source and upstream of the object under examination, can comprise various aperture elements that can be adjusted, for example, by means of corresponding actuators, to display the desired radiation field. For example, a radiation cone can be displayed using lead lamellae as aperture elements. To adjust the aperture device or the aperture elements in concrete terms, it is known, for example, to use manual rotary knobs directly on the aperture housing (near the patient) and / or control buttons on a near / remote control device. When operated directly on the aperture, in particular via rotary knobs, the operator observes the size of the display, for example via a light projection from the aperture device, which visualizes the displayed X-ray field.The operator uses his hands away from the patient on the aperture device, which is usually located above the patient along with the X-ray tube. This results in suboptimal hand-eye coordination.

[0004] Using a mobile control device and / or control buttons also makes operation less intuitive and comfortable. This is especially true when the operator operates the various controls from various positions around the patient table, as these operate from a preferred position, and only from this preferred position can the expected horizontal or vertical aperture be correctly opened. The operator must mentally correct their orientation, which is considered unfavorable from a usability perspective.

[0005] DE 10 2014 205 671 A1 relates to a generic device for aperture control. A display unit is used to display a representation of the aperture, and an input unit is also provided, which can be configured as a touchscreen. The representation of the aperture can consist of an image of the aperture, which can be simplified or schematized. On a touchscreen, it is proposed to allow a shift by shifting the representation on the touchscreen, a magnification or reduction by means of a pinch gesture, and corresponding combinations. In particular, a section of the patient can be displayed with a region corresponding to the radiation field set by the aperture.

[0006] Further relevant prior art is the document DE 10 2013 219 194 A1.

[0007] The invention is based on the object of providing a possibility for more intuitive and simple adjustment of an aperture device in an X-ray imaging device.

[0008] To achieve this object, in a method of the type mentioned at the outset, it is provided according to the invention that position information describing the position and / or orientation of the operator is determined from sensor data of at least one sensor and is used to select a perspective that at least approximately corresponds to the viewing angle of the operator on the patient table for the three-dimensional visualization showing the radiation field with the current aperture settings.

[0009] According to the invention, it is further proposed to use a mobile, wireless, handheld operating device, which is preferably designed as a smart device, in particular a smartphone and / or a tablet. The operating device can be moved to different positions in the room in which the X-ray device is arranged, thus resulting in different suitable perspectives for intuitive control of the aperture settings. According to the invention, it is now proposed to track at least the rough position of the operator in the room with the operating device and to take this into account when generating the display on the touchscreen in order to select a corresponding, suitable perspective. Using the position information, a 3D representation of the aperture setting, in particular in the form of a radiation field, can be visualized on the mobile operating device, which corresponds to the actual operator view of the patient.While the operator has both the patient and the aperture settings in view, intuitive control of the aperture device is achieved. The intuitiveness and simplicity of operation is further enhanced by the use of a touchscreen, which allows direct manipulation of the display elements relating to the radiation field to adjust the aperture settings accordingly.

[0010] While it is fundamentally conceivable within the scope of the present invention to determine the position information by detecting and tracking the operator himself in sensor data of an operator sensor that detects the operator, in particular to determine the position information from sensor data of a camera that tracks the operator, a particularly preferred embodiment of the present invention provides that position data comprising a position and / or an orientation of the operating device are determined by means of the at least one sensor, wherein the position information is derived from the position data using at least one assumption regarding the operator, in particular a size and / or a viewing direction of the operator.This configuration is particularly advantageous because the position data relating to the operating device, in particular a smart device, can also be used for other operating functions of the operating device, for example, to control the movement of movable components of the X-ray device, etc. Since the operator is holding the operating device in their hand, the position and, if applicable, orientation of the operating device can easily be used to infer the position of the operator, in particular the position of the operator's eyes, for which, for example, appropriate assumptions can be made.It should be noted that in an embodiment of the method according to the invention, which will be discussed in more detail below, it may also be sufficient to assume the position of the operating device as the position of the operator, since it has already been shown that an essential factor with regard to intuitive operation is the orientation with regard to the patient table and that even when evaluating a rough position, a significant improvement in operability is already possible by choosing a suitable perspective.

[0011] Preferably, the operating data can be determined from the sensor data of at least one operating device sensor installed in the operating device. Especially when a smart device is used as the operating device in the preferred manner, such smart devices already have corresponding operating device sensors, which, within the scope of the present invention, expediently provide suitable sensor data for determining the position data and thus the position information.

[0012] Thus, in an advantageous embodiment of the present invention, it can be provided that at least one operating device sensor is a camera, in whose image data optical markers arranged in the room in which the X-ray device is arranged, the position of which in the room is known, are detected and used to determine the position data. In particular, it can be provided that the operating device has two cameras, in particular a front camera and a rear camera, which during normal use of the operating device are also aligned so that a corresponding amount of the room and thus of the optical markers proposed here can be captured. The markers are continuously recorded and analyzed by the at least one camera that is usually already present in the operating device, wherein the operator carries the operating device in his or her natural manner and therefore does not have to assume a searching position for the camera of the operating device.The position of the respective optical markers in the room can be precisely determined during a configuration phase and communicated to the control unit performing the evaluation, in particular the control unit of the medical device and / or the control unit of the operating device. Specifically, it is conceivable, for example, to use passive optical markers, such as printed stickers, and attach them to the ceiling, walls, and / or floor of the room in which the X-ray device is located. Attaching optical markers to the X-ray device itself is also conceivable.

[0013] However, a preferred embodiment of the present invention provides that at least some of the markers are active markers, in particular comprising optical and / or infrared LEDs. It is particularly expedient if the active markers are controlled for position determination by the operating device via a short-range radio connection, in particular a Bluetooth connection. Optimized detection of the optical markers can therefore be achieved using active and synchronized markers (optical beacons). Synchronization can be achieved via the short-range radio interface that is also usually present in smart devices, for example Bluetooth Low Energy (BLE). By actively controlling brightly illuminated active markers, in particular brightly illuminated infrared LEDs of the markers, significantly better detection of the optical markers can be achieved.These optical markers are or will be conveniently synchronized with the operator control device sensors, as explained.

[0014] In this context, an expedient development of the invention provides that the position data is determined at least partially using a signal propagation time method and / or based on the field strength of the radio signals emitted by the markers in a bidirectional short-range radio connection. If the active markers, e.g., designed as optical beacons, are configured for direct communication with the operating device via a dedicated short-range radio interface, they also form radio markers (in particular radio beacons / beacons) in addition to the optical marker properties, which can already contribute to at least a rough determination of the position of the operating device in space, for example, by measuring the propagation time of radio signals and / or their strength. The corresponding field strengths (reception strengths) in space can be determined in a configuration phase, as proposed, for example, in a BLE beacon concept from Fujitsu.

[0015] Even in an embodiment in which no short-range radio connection is established to active optical markers, a similar functionality with a rough positioning determination can be enabled. In this case, the actively light-emitting optical markers are operated as light beacons. For this purpose, the actively light-emitting optical markers can be provided to emit a marker-specific identification signal modulated onto the light, which is evaluated by the receiving control device. Based on the identification signals detected in the camera's sensor data, a rough positioning determination can be made, which may already be sufficient. Such technology has already been proposed in the state of the art for localization, for example in supermarkets, by Philips Lighting (White Paper "Indoor Positioning").

[0016] Preferably, in particular in addition to the at least one camera, at least one acceleration sensor and / or at least one yaw rate sensor and / or at least one magnetic field sensor, in particular as a compass, can be used as the operating device sensor, wherein in particular the position data is determined at least partially by means of dead reckoning. It is particularly expedient within the scope of the present invention if the tracking of the orientation and position of the smart device is supported by dead reckoning (inertial navigation), which is often also referred to as dead reckoning. If, for example, the optical marker recognition temporarily fails due to unfavorable viewing angles or is hindered, the position data can still be determined.

[0017] In a particularly advantageous embodiment of the present invention, it can be provided that the representation is generated assuming a viewing direction directed towards a reference point of the X-ray device. As already indicated, the development of the present invention has shown that taking into account the relative position of the operator to the X-ray device, in particular with respect to the patient table, is essential for selecting a suitable perspective, so that the resulting viewing direction towards a reference point of the X-ray device from the position described by the position information can at least partially define a perspective from which the representation is generated on the touchscreen.In this way, for example, regardless of which side of the X-ray device / patient table the operator is located on, an appropriately adjusted perspective display can be generated that can be intuitively aligned with the real, perceived situation on the patient table and thus enables simple, fast and reliable adjustment of the aperture device.

[0018] Specifically, the reference point can be selected as the center of the patient table and / or the intersection point of the central beam with the patient table. This assumes that the operator, when controlling the aperture device, will focus their attention on the examination area of ​​the patient positioned on the patient table. The easily determined center of the patient table can be used here, but the position at which the central beam strikes the patient table can also be dynamically selected, depending on the adjustability of the patient table or the imaging setup. Of course, other reference points of the X-ray system can also be used, whose position in space can be determined relative to the position information.

[0019] In a specific, preferred embodiment of the present invention, a ring of possible observation points defining perspectives that can be selected together with the viewing direction directed toward the reference point is defined around the reference point. The perspective described by the observation point closest to the position described in the position information is selected. The corresponding observation point with the viewing direction toward the reference point thus defines the perspective from which the representation is generated. The ring does not necessarily have to be circular but can also, for example, describe an ellipse that takes into account the elongated shape of the patient table.It has been shown that such a restriction of the possible observation points to lie on a ring, which in particular has at least one fixed and / or dynamically determinable radius and / or a fixed and / or dynamically determinable height above the ground, is sufficient, since minor deviations from the actual eye position of the operator are hardly noticeable and the intuitiveness of the display is nevertheless maintained. The height and / or the at least one radius of the ring can, for example, be selected such that a particularly clearly recognizable, intuitively readable display showing all relevant details is obtained. This makes it possible, in particular, to select these values ​​fixed and thus already retain the basis of the display or at least to be able to calculate them quickly, so that computing time and / or computing effort can be advantageously saved and yet practical display can be provided for the operator.

[0020] However, it is also conceivable to select the position of the ring depending on the actual operator. For example, it can be provided that the height of the ring is selected depending on operator height information that is predetermined and / or can be derived from the sensor data and / or can be specified by the operator. For example, the height of the operator's eyes above the ground can be derived or estimated from the sensor data, particularly if the data also shows the operator themselves, in order to capture the operator's perspective as accurately as possible. Input from or retrieval from user profiles or the like is also possible. Accordingly, the at least one radius can also be determined empirically orfor optimal viewing, it is also conceivable to work with the position information with regard to at least one radius of the ring and to adapt the ring dynamically in accordance with the position information to the distance from the reference point described by the position information.

[0021] With regard to the actual control of the aperture settings by the operator, a specific embodiment can provide that, when the operator manipulates the corner points of the beam field shown in the display, the aperture settings are adjusted to a corresponding geometry of the beam field and / or, when the operator shifts the beam field shown in the display, a corresponding shift of the aperture components is performed. In principle, the operating options already described in DE 10 2014 205 671 A1 can also be implemented within the scope of the present invention.For example, intuitive aperture control can be achieved by the operator by touching a sensitive corner point of the radiation field, symbolized, for example, as an aperture setting rectangle, moving the corner point on the touch surface, and transmitting this control information in real time to the control unit of the X-ray device. By touching the center of the displayed radiation field and moving the entire radiation field on the touch surface, control information can be derived, which, for example, allows the assembly comprising the X-ray tube and aperture device, equipped with appropriate actuators, to be moved, allowing intuitive fine adjustment of the desired exposure region.In particular, the X-ray tube and the aperture device are implemented as a single unit that can be adjusted jointly by appropriate actuators, which can also be achieved by manipulating the display on the touchscreen of the control device. Of course, beyond these examples, other specific control options using the touchscreen are also conceivable, from which corresponding control information can be derived.

[0022] A further development of the invention provides that, in order to generate a further, additionally shown and / or alternatively selectable representation containing a radiation field, image data is recorded by a supervisory camera arranged on the X-ray tube and / or the aperture device, which is directed in the direction of the central beam of the X-ray tube, and the further representation is generated from the perspective of the X-ray tube onto the recording area. In this case, the X-ray tube and the aperture device are again preferably implemented as a single structural unit, on which the supervisory camera is arranged, which reproduces the view of the examination region from the perspective of the X-ray tube. In this way, the operator can be provided with even more visual information, thereby supporting intuitive aperture control overall.

[0023] In addition to the method, the present invention also relates to an X-ray device comprising an X-ray source associated with a diaphragm device, an X-ray detector, a patient table for supporting a patient to be scanned, a wireless, handheld operating device with a touchscreen, and a control device designed to implement the method according to the invention. All statements regarding the method according to the invention can be applied analogously to the X-ray device according to the invention, with which the aforementioned advantages can also be achieved.

[0024] Further advantages and details of the present invention will become apparent from the exemplary embodiments described below and from the drawings. In the drawings: Fig. 1 a schematic diagram of an X-ray device according to the invention in a room, Fig. 2 a sketch for determining position data, Fig. 3 a possible definition of a ring of possible observation points, and Fig. 4 a perspective view of the operator on the X-ray device and a corresponding generated display on the control device.

[0025] Fig. Figure 1 shows a highly simplified schematic diagram of a medical imaging X-ray device 1 arranged in a room 2. The X-ray device 1 comprises, as components, at least one structural unit 3, which includes an X-ray source 4 and an associated aperture device 5, a patient bed 6, and an X-ray detector 7. The operation of the X-ray device 1 is controlled by a control device 8.

[0026] At least parts of the components of the X-ray device 1 are movable or generally adjustable. Corresponding actuators for implementing the respective adjustability deliver signals to the control device 8, which thus knows the current settings of the respective components. At the same time, the control device 8 can generate control signals to the corresponding actuators to make adjustments.

[0027] The aperture device 5 has adjustable aperture elements for blending a radiation field defined by the settings of the aperture device 5 into the examination area. Individually controllable lead plates, for example, can be provided as aperture elements. The aperture device 5 is thus arranged on the beam path between the X-ray tube 4 and the X-ray detector 7, between the patient to be examined and the X-ray tube 4. It serves to achieve sufficiently good image quality, for example, by avoiding overexposure, and to limit the dose to what is necessary for the patient.

[0028] For the operator-side control of the aperture device 5, but also of other components of the X-ray device 1, the X-ray device 1 further comprises a wireless, handheld, mobile operating device 9, which is designed as a smart device 10, in this case a smartphone. The operating device 9 has a touchscreen 11 as a display and input means; furthermore, several operating device sensors 12 are provided, which may include, for example, a front camera and a rear camera, acceleration sensors, yaw rate sensors, and at least one magnetic sensor. A communication connection 13 to the control device 8 can be established via a corresponding radio interface (not shown in detail here), for example, a Bluetooth interface and / or a WLAN interface. Of course, parts of the control device 8 can also be implemented by a control unit of the operating device 9.

[0029] The control device 8 is now also designed, in particular, to determine position data that describe the position and, if applicable, also the orientation of the operating device 9 in the room 2. For this purpose, the operating device sensors 12, in particular the camera in conjunction with optical markers 14 distributed in the room 2, are used, as now with regard to Fig. 2 will be presented in more detail.

[0030] Fig. Figure 2 shows a perspective view of room 2. First, the X-ray device 1 can be seen, comprising the patient table 6, the assembly 3, and the X-ray detector 7 as components; the aperture device 5 is not shown for clarity. An operator's hand 16 holds the control unit 9 in room 2, with the detection area 15 of the front camera indicated as the control unit sensor 12. The markers 14, which are clearly distinguishable in their optically perceptible patterns, are clearly distributed at various locations in room 2, in this case at least on the ceiling and walls for the sake of clarity; an arrangement of optical markers 14 on the floor is of course also possible. The active markers 14 in this case have infrared LEDs 17 in various patterns.

[0031] During operation to control the aperture device 5, position data of the control device is continuously generated by the control device 8. After the position and properties of the markers 14 have been determined in a configuration phase and stored, for example, in a database, the markers 14 detected by the camera can be used to determine the position. The active markers 14 are controlled via appropriate short-range radio links to output corresponding, detectable signals in synchronization with the control device 9. The infrared LEDs 17 enable reliable detection of the markers 14. In addition to the sensor data from the camera, the sensor data from acceleration sensors (tilt in space), yaw rate sensors (movement), and magnetic field sensors (orientation to north can be roughly determined) are also taken into account as control device sensors 12.

[0032] The position data of the operating device 9, which are determined in this way, can already be understood as position information of the operator, since the operator is holding the operating device 9 in his hand 16. However, they can also serve as a basis for deriving or estimating position information of the operator, in particular the operator's eyes. For example, a certain offset, a certain height of the operator's eyes, and a certain viewing direction of the operator can be assumed.

[0033] In the embodiment described here, however, the position data are used directly as position information of the operator in order to serve as a perspective for a display on the touchscreen 11 of the operating device 9 that visualizes the radiation field three-dimensionally and is used to adjust the aperture settings.

[0034] Since it is known that the operator usually looks in the direction of the patient table 6, specifically the examination area, when operating the aperture device 5, and there are particularly suitable viewing angles on this area for settings in order to visualize the radiation field, in the present case, cf. Fig. 3, a reference point 18 of the X-ray device 1, in this case the center of the patient table 6 or the point on the patient table 6 that the central beam of the X-ray tube 4 would strike, is defined. A ring 19 of possible observation points 20 extends around this reference point 18, wherein each of the observation points 20, together with a viewing direction to the reference point 18, defines a perspective. The ring 19 is represented here by way of example in a circular shape, which is certainly a possible choice; however, it is also conceivable to use fundamentally different ring shapes, for example an elliptical shape, in order to better accommodate the elongated shape of the patient table 6.

[0035] The height of the ring 19, and thus of the observation points 20, above the ground as well as the at least one radius of the ring 19, and thus the distances of the reference points 20 to the reference point 18, can be fixed, but can also be selected dynamically, with regard to the distance, for example, as a function of a distance from the reference point 18 described by the position information or, in the case of a circular shape, as this, or, with regard to the height, as a function of size information of the current operator, which can be obtained, for example, from an operator input and / or from sensor data showing the operator.

[0036] In the present embodiment, we assume fixed, predefined perspectives that provide an optimal, direction-dependent view of the radiation field (and in particular the patient bed). Then, to select a perspective for the representation to be generated, the observation point 20a closest to the current position 21 of the operator, described by the position information, is selected. This observation point, as mentioned, together with the viewing direction to the reference point 18, defines the perspective.

[0037] Fig. 4 shows, side by side, the operator's view of the real X-ray device 1 with the patient table 6, the assembly unit 3 and the X-ray detector 7, wherein a patient 22 to be examined is already positioned on the patient table 6. On the touchscreen 11 of the control device 9, which serves as a display, a representation 23 derived from the position information can be seen, which representation consists of the Fig. 3 selected perspective (which at least substantially corresponds to the operator's perspective on the real patient table 6) a virtual representation of the patient table 6 and, in the form of a rectangle 24, the resulting radiation field with the current aperture settings. By manipulating the rectangle 24 as a display element, the aperture settings can be changed, for example, by grasping the corner points the radiation field can be reduced or enlarged and / or by moving the entire rectangle 24 a displacement of the structural unit 3 and thus the aperture device 5 can be achieved. From the corresponding operating information of the touchscreen 11, the control device 8 derives control information which brings about a corresponding adjustment of the aperture device 5.

[0038] As can be seen from Fig. 4, the matching perspectives provide a particularly intuitive and useful operating aid for operating the aperture device 5.

[0039] It should also be noted that in order to generate a further display on the structural unit 3 which additionally supports the operator, a supervisory camera 25 aligned in the direction of the central beam (cf. Fig. 1) can be provided so that the image is generated from the viewing angle of the X-ray tube 4. The further image can be selected by the operator.

[0040] Although the invention has been illustrated and described in detail by the preferred embodiment, the invention is not limited to the disclosed examples and other variations may be derived therefrom by those skilled in the art without departing from the scope of the invention. List of reference symbols 1 X-ray device 2 rooms 3 construction units 4 X-ray tubes 5 Aperture device 6 patient beds 7 X-ray detector 8 Control device 9 Control device 10 Smart Devices 11 touchscreen 12 Control unit sensor 13 Communication connection 14 markers 15 Detection range 16 hands 17 infrared LEDs 18 Reference point 19 rings 20 observation point 20a Observation Point 21 positions 22 patients 23 Representation 24 Rectangle 25 surveillance cameras

Claims

[1] Method for operating a diaphragm device (5) of a medical X-ray imaging device (1), which has an X-ray emitter (4) to which the diaphragm device (5) is assigned, an X-ray detector (7), a patient table (6) for supporting a patient (22) to be admitted, and a wireless, handheld operating device (9) having a touchscreen (11), wherein a display (23) visualizing the current setting of the diaphragm device (5) is generated on the touchscreen (11), and the diaphragm device (5) is set according to operating data describing a manipulation of display elements of the display (23), characterized bythat position information describing the position (21) and / or orientation of the operator is determined from sensor data of at least one sensor and is used to select a perspective that at least approximately corresponds to the viewing angle of the operator on the patient table (6) for the three-dimensional visualization (23) showing the radiation field with the current aperture settings. [2] Method according to claim 1, characterized by that the position information is determined from sensor data from a camera that tracks the operator. [3] Method according to claim 1 or 2, characterized bythat position data comprising a position and / or an orientation of the operating device (9) are determined by means of the at least one sensor, wherein the position information is derived from the position data using at least one assumption regarding the operator, in particular a size and / or a viewing direction of the operator. [4] Method according to claim 3, characterized by that the position data are determined from the sensor data of at least one operating device sensor (12) installed in the operating device (9). [5] Method according to claim 4, characterized bythat at least one operating device sensor (12) is a camera in whose image data optical markers (14) arranged in the room (2) in which the X-ray device (1) is arranged are detected and used to determine the position data, and / or, in particular in addition to the camera, at least one acceleration sensor and / or at least one yaw rate sensor and / or at least one magnetic field sensor, in particular as a compass, are used as the operating device sensor (12). [6] Method according to one of the preceding claims, characterized by that the representation (23) is generated assuming a viewing direction directed towards a reference point (18) of the X-ray device (1). [7] Method according to claim 6, characterized by that a center point of the patient table (6) and / or an intersection point of the central beam with the patient table (6) is selected as the reference point (18). [8] Method according to claim 6 or 7, characterized bythat a ring (19) of possible observation points (20, 20a) defining perspectives that can be selected together with the viewing direction directed towards the reference point (18) is defined around the reference point (18), the perspective described by the observation point (20, 20a) closest to the position (21) described in the position information being selected. [9] Method according to claim 8, characterized by that the height of the ring (19) above the ground is selected depending on operator height information which is predetermined and / or derivable from the sensor data and / or predeterminable by the operator. [10] Method according to one of the preceding claims, characterized bythat when the operator manipulates the corner points of the beam field shown in the representation (23), the aperture settings are adapted to a corresponding geometry of the beam field and / or when the operator shifts the beam field of the representation (23), a corresponding shift of the aperture components is carried out. [11] Method according to one of the preceding claims, characterized by in that, in order to generate a further, additionally shown and / or alternatively selectable representation containing a radiation field, image data from a supervisory camera (25) arranged on the X-ray emitter (4) and / or the diaphragm device (5) and directed in the direction of the central beam of the X-ray emitter (4) are recorded and the further representation is generated from the viewpoint of the X-ray emitter (4) onto the recording area. [12] X-ray device (1) comprising an X-ray emitter (4) to which an aperture device (5) is assigned, an X-ray detector (7), a patient table (6) for supporting a patient (22) to be admitted, a wireless, hand-held operating device (9) comprising a touchscreen (11) and a control device (8) designed to carry out a method according to one of the preceding claims.

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