Methods and localization systems for locating a portable component of an imaging system during an examination procedure, as well as imaging systems

Abstract

The invention relates to at least one method and at least one localization system for localizing a portable component (6, 13) of an imaging system (1), wherein the portable component (6, 13) is arranged on a patient (8) for an examination procedure, comprising: - Emitting at least one optical localization signal (210, 211, 212) in an imaging area (12) of the imaging modality (11) by at least one optical transmitting element (201, 202, 203), - Receiving the at least one emitted optical localization signal (210, 211, 212) by at least one optical receiving element (220, 221, 222) which is arranged on the portable component (6, 13), - Transmission of at least one received optical localization signal (210, 211, 212) via an optical transmission link (230 - 235) to an electronic evaluation unit (240) which is located outside an examination room (250), and - Localization of the portable component (6 ,13) based on the at least one received optical localization signal (210, 211, 212) by the electronic evaluation unit (240).

Description

[0001] Regardless of the grammatical gender of a particular term, persons with male, female or other gender identities are included.

[0002] The present invention relates to a method for locating a portable component of an imaging system during an examination procedure of a patient using an imaging modality of the imaging system, wherein the portable component is arranged on the patient for the examination procedure.

[0003] Furthermore, the invention relates to an electronic localization system for locating a portable component of an imaging system during an examination procedure using an imaging modality of the imaging system, wherein the portable component can be positioned on the patient for the examination procedure.

[0004] Furthermore, the invention relates to an electronic imaging system comprising an imaging modality, at least one portable component, and an electronic localization system.

[0005] The invention also relates to a method for locating a portable component of an imaging system during an examination procedure of a patient using an imaging modality of the imaging system, wherein the portable component is arranged on the patient for the examination procedure.

[0006] Furthermore, the invention relates to an electronic localization system for locating a portable component of an imaging system during an examination procedure of a patient using an imaging modality of the imaging system, wherein the portable component is arranged on the patient for the examination procedure.

[0007] Furthermore, the invention relates to an imaging system comprising an imaging modality, at least one portable component, and an electronic localization system.

[0008] Imaging systems enable imaging procedures, particularly diagnostic imaging, to be performed on patients. These systems primarily allow for instrumental examination methods that can, for example, provide two- or three-dimensional image data of the patient's organs and structures. Examples of imaging systems include magnetic resonance imaging (MRI) and computed tomography (CT) systems. Various other types of imaging systems are also known.

[0009] In magnetic resonance imaging (MRI), knowledge of the coil positions is crucial during an examination procedure, such as a scan. This is particularly important for the subsequent reconstruction of images, such as MRI scans. These coils can be local coils, such as body coils. Multiple coils can be used for the examination. These coils can be flexibly designed to allow for placement on the patient's specific body regions. Information about the position or movement of the patient's body parts, such as limbs or breathing patterns, is also essential, in addition to coil position, for achieving accurate image reconstruction with the required image quality.The patient's position and / or movement can be used as triggers for the magnetic resonance imaging (MRI) sequence. If excessive patient movement is detected during the examination, the patient may be instructed to remain still and / or breathe more calmly to avoid unduly influencing the measurements. If this is indeed the case, the measurements, particularly the scans, would need to be repeated.

[0010] Currently, patient movements can be detected using various methods, such as attached sensors or external cameras. The presence of cameras can be particularly uncomfortable for patients. Furthermore, the very high levels of radiation emitted by the imaging system can negatively impact camera images. The coil's position is not explicitly considered at present, as it is assumed that the coil's position remains fixed throughout the imaging sequence.

[0011] For example, US 020220091202 A1 discloses a magnetic resonance imaging (MRI) system. The MRI system comprises: a subject rest configured to move a subject between a loading position and an imaging position; a MRI receiving coil configured to be placed on the subject; and a light detection system comprising at least one ambient light sensor for measuring light data. The light detection system is attached to the main magnet so that the light data from the imaging zone is measured. The execution of machine-executable instructions by a processor causes the processor to: move the subject rest from the loading position to the imaging position; and acquire the light data using the at least one ambient light sensor when the subject rest is in the imaging position.

[0012] Therefore, one object of the present invention is to be able to carry out an improved, in particular more reliable, localization, especially position determination, of a portable component of an imaging system, wherein the portable component may be a body coil or another object carried by the patient.

[0013] This problem is solved by a method according to claim 1, an electronic localization system according to claim 5, an imaging system according to claim 6, a method according to claim 7, an electronic localization system according to claim 11, and an imaging system according to claim 13. Meaningful further developments arise from the dependent claims.

[0014] Advantageous embodiments of one of the independent claims may be considered advantageous embodiments of all other independent claims and vice versa.

[0015] A first aspect of the invention relates to a method for locating a portable component of an imaging system during an examination procedure of a patient using an imaging modality of the imaging system, wherein the portable component is arranged on the patient for the examination procedure, characterized by, - In particular, the emission of at least one optical localization signal in an imaging area of ​​the imaging modality within which the patient is located during the examination process, by means of at least one optical transmitting element, - In particular, receiving the at least one emitted optical localization signal by at least one optical receiving element which is arranged on the portable component, - In particular, transmitting the at least one received optical localization signal via an optical transmission link to an electronic evaluation unit located outside an examination room in which the imaging modality is arranged, and - In particular, localizing the portable component based on at least one received optical localization signal by the electronic evaluation unit.

[0016] The proposed method allows for improved localization of the component worn by the patient during the examination. By performing localization based on optical signals and thus using optical signal analysis, the localization can be carried out in such a way that it does not negatively affect the imaging system. Since very strong electromagnetic fields are present in the examination room, especially in imaging systems such as MRI scanners, at least one received optical localization signal can be transmitted outside the examination room via an optical transmission link, such as a fiber optic cable, so that the analysis of the received optical localization signal can be performed outside the examination room.

[0017] The optical localization method, which is achievable with the proposed procedure, enables continuous localization and thus continuous position tracking of the patient-worn component. This can contribute to improved image reconstruction and therefore the generation and, in particular, provision of images with better image quality by the imaging system. In contrast to previous methods, an adjustment sequence measurement can be omitted, thus accelerating the evaluation of each image and especially the scans.

[0018] The portable component can be a device of the imaging system worn by the patient. This device serves to track and monitor the patient's position and / or movement during the examination. Alternatively, the portable component could be a flexible coil or local coil of the imaging system. The imaging modality, which performs the actual scan, is located within the examination room. Control units of the imaging system and an electronic evaluation unit can be located outside the examination room, thus protecting them from the strong electromagnetic or magnetic fields within the examination room.

[0019] The electronic evaluation unit can be an evaluation system or a computing unit. The optical transmitting element can be called a transmitting unit and can be located within the imaging modality. It is also conceivable that several such optical transmitting elements are arranged within the imaging area, so that multiple optical localization signals can be emitted depending on the circumstances. This allows for improved localization. The optical localization signal can be an optical signal, in particular a light-based signal. The emitted optical localization signal can be received by the optical receiving element, which is a receiving unit. This optical receiving element, or several such optical receiving elements, can be arranged on the portable component.Thus, light can be emitted from the transmitter elements to the wearable component. Specifically, the emission occurs within the imaging area, which could, for example, represent the patient tunnel. Depending on the wearable component's location, a reception process can then be initiated based on the emitted optical signals. The received optical localization signal, or multiple such signals, can then be transmitted to the evaluation unit for analysis via the optical transmission link or multiple optical transmission links. The electronic evaluation unit can perform appropriate signal processing, particularly optical signal processing, to generate information that can be used to locate the wearable component during the examination.

[0020] In particular, the proposed method may be a computer-implemented method.

[0021] It is intended that, based on at least one received optical localization signal, the electronic evaluation unit determines the signal propagation time of the transmitted and received optical localization signal. Transmission information regarding the transmission of the optical localization signal is provided to the electronic evaluation unit and is taken into account when determining the signal propagation time. Information regarding the localization of the portable component can be determined, for example, using a propagation-time method based on the transmitted optical signal, which can then be received and processed. The signal propagation time of the transmitted and received optical localization signal, which was transmitted to the evaluation unit via the optical transmission link, can be determined.In particular, the optical localization signal may be a ToF signal (“Time-of-Flight” (ToF)).

[0022] In other words, the optical localization signal can be emitted, for example, as a light pulse or light. This allows a time, such as the signal propagation time, from transmission to reception to be determined. For this purpose, information regarding the transmission, i.e., the transmission process, can be provided to the evaluation unit. The transmitting unit can also be connected to the evaluation unit via an optical transmission link.

[0023] Thus, a propagation time can be determined for one optical localization signal as well as for other optical localization signals.

[0024] In one embodiment (of the first aspect), the electronic evaluation unit determines the distance between the at least one optical transmitting element and the at least one optical receiving element based on the signal propagation time. Based on this determined distance, the position of the at least one optical receiving element is then determined. The portable component can be located based on the position of the at least one optical receiving element. In other words, the position of the receiving elements, particularly the single receiving element, is determined by optical signal processing. Various signal processing methods, such as triangulation, can be used for this purpose. The portable component can then be located based on the position of the receiving element, since the receiving element is located on or attached to the portable component.

[0025] Based on a time-of-flight method, the distance between a transmitter and receiver can be determined depending on the respective signal propagation time of the transmitted and received optical localization signal. This is because the required time is directly proportional to the distance. Thus, the distance between the transmitter and receiver can be determined. Based on the signal propagation time, the distance, and / or other information or signals, the position of the receiving element, and therefore the portable component, can be determined, for example, using trilateration.

[0026] Furthermore, it is advantageous if multiple optical localization signals are emitted by various transmitters and received by multiple receivers on the portable component. This allows for the determination of multiple distances from this multitude of signals, which can then be used for position determination and, in particular, for trilateration.

[0027] The optical localization signal cannot be laser light, but rather simple diffuse light with modulatable amplitude. This allows the phase of the received signal to be compared with the transmitted signal, from which the distance can then be calculated. The signal can be modulated in such a way that virtually no aliasing occurs, especially in the area of ​​the patient table.

[0028] In one embodiment of the aspect (first aspect), it is provided that, in addition to the at least one optical localization signal having a first wavelength, at least one further optical localization signal having a second wavelength different from the first wavelength is transmitted by at least one further optical transmitting element. The at least one further optical localization signal is received by the at least one optical receiving element or at least one further optical receiving element arranged on the portable component, and the at least one received further optical localization signal is taken into account when localizing the portable component.By emitting multiple optical signals, several distances between the transmitters and receivers can be determined, making this advantageous for positioning the receivers and, in particular, for localizing the portable component. The optical localization signals can therefore be emitted at different wavelengths. Specifically, wavelengths from the electromagnetic spectrum, ranging from ultraviolet to infrared radiation, can be used.

[0029] Another aspect (second aspect) concerns an electronic localization system for locating a portable component of an imaging system during an examination procedure of a patient using an imaging modality of the imaging system, wherein the portable component can be positioned on the patient for the examination procedure. characterized by, - In particular, at least one optical transmitting element which can be arranged on the imaging modality, wherein the at least one optical transmitting element is designed to transmit at least one optical localization signal in an imaging area of ​​the imaging modality within which the patient is located during the examination process, - In particular, at least one optical receiving element which can be arranged on the portable component, wherein the at least one optical receiving element is designed to receive at least one emitted optical localization signal, - In particular, an electronic evaluation unit which can be arranged outside an examination room in which the imaging modality can be arranged, wherein the electronic evaluation unit is connected to the at least one optical receiving element by means of an optical transmission link, so that the at least one received optical localization signal can be transmitted to the electronic evaluation unit, - In particular, the electronic evaluation unit, which is designed to locate the portable component based on at least one received optical localization signal.

[0030] The proposed electronic localization system can improve the imaging process of an imaging system by enabling more precise localization of a patient-worn component. This allows for more reliable determination and monitoring of the component's position, and consequently, the patient's position and movement. This is particularly advantageous for image reconstruction of the patient's images acquired using the imaging modality.

[0031] In particular, the electronic localization system may be trained to execute or carry out a procedure according to the previous aspect (first aspect) or an advantageous further development thereof.

[0032] Specifically, the statements regarding the procedure according to the first aspect also apply (analogously) to the localization system according to the second aspect.

[0033] The electronic localization system is designed for integration into an imaging system. For this purpose, one or more optical transmitters can be positioned on the imaging modality to transmit optical localization signals within the imaging area. At least one receiver, or several receivers, can be positioned on the portable component of the imaging system, which may be a patient-worn device or a local coil. The electronic evaluation unit is typically located outside the examination room containing the imaging modality and thus the area with an increased electromagnetic field.

[0034] The transmitting element and / or the receiving element can each be connected to the evaluation unit via optical transmission links, so that optical signal transmission can be carried out in the area outside the examination room in order to perform signal processing and, in particular, the localization of the portable component there.

[0035] In one embodiment of the further aspect (second aspect), the at least one optical transmitting element is connected to the electronic evaluation unit via a further optical transmission link. This allows the evaluation unit to receive information regarding the transmission and reception of the optical localization signal, enabling it to determine, for example, the signal propagation time and the distance between the transmitted and received optical signals. In particular, this information can be used to determine the position of the at least one receiving element and thus the localization of the portable component within the imaging area.

[0036] In particular, at least one optical transmission path and the other optical transmission path can be designed as optical fibers. Specifically, these can be fiber optic cables or fiber optic connections. Thus, the corresponding optical signals can be transmitted from the transmitting and receiving unit to the evaluation unit via fiber optics, for example. This optical signal transmission prevents any significant negative interference with the imaging process within the examination room. Furthermore, the influence of strong magnetic or electromagnetic fields in the examination room on signal processing can be minimized, since the fiber optics, for example, are less affected by the imaging system, and the corresponding evaluation takes place outside the examination room and outside the interfering fields.

[0037] A further aspect (third aspect) of the invention relates to an imaging system comprising an imaging modality, at least one portable component, and an electronic localization system according to the previous aspect (second aspect) or an advantageous embodiment thereof. The imaging system can, for example, be configured as an MRI system or a CT system. Using the imaging modality, examinations can be performed on a patient based on magnetic fields.

[0038] The electronic localization system's at least one optical transmitter is located on the imaging modality. It is positioned such that optical signals can be emitted within the imaging area where the patient is located during the examination. The at least one receiver can be located on the portable component, such as a local coil, of the imaging system. As mentioned previously, the electronic evaluation unit is located outside the imaging system's examination area, ensuring that signal evaluation and subsequent processing are not disrupted by magnetic and / or electromagnetic fields.

[0039] A further aspect (fourth aspect) of the invention relates to a method for locating a portable component of an imaging system during an examination procedure of a patient using an imaging modality of the imaging system, wherein the portable component is arranged on the patient for the examination procedure, characterized by, - In particular, the emission of at least one first optical localization signal in an area surrounding the imaging modality by a first optical transmitting device which is arranged at a distance from the imaging modality in the area surrounding the imaging modality, - In particular, the emission of at least one second optical localization signal in the vicinity of the imaging modality by means of a second optical transmitting device arranged at a distance from the first optical transmitting device, which is arranged at a distance from the imaging modality in the vicinity, - In particular, receiving the emitted first and second optical localization signals by at least one optical receiving element arranged on the portable component, - In particular, transmitting the received first and second optical localization signals via an optical transmission link to an electronic evaluation unit located outside an examination room in which the imaging modality is arranged, and - In particular, localizing the portable component based on the first and second optical localization signals by the electronic evaluation unit.

[0040] The proposed method enables improved localization of the portable component, which can be a portable object or a local coil. In particular, an optical localization method can be applied. Specifically, localization can be performed using light.

[0041] Based on the emitted optical localization signals within the examination room, reliable localization of the wearable component, and thus of the patient wearing it, can be achieved. This allows for patient tracking during the examination without the need for cameras or other sensors. By emitting and evaluating these optical signals, efficient localization of the wearable component, and therefore of the patient, can be performed during the examination. Since the evaluation of the optical signals takes place outside the examination room, the influence of the evaluation equipment on the imaging system, and vice versa, can be prevented or minimized.

[0042] The two or more transmitting devices can be arranged at a distance from each other and, in particular, from the imaging modality within the area surrounding the imaging modality. In other words, in addition to the imaging modality, the two transmitting devices are located within the examination area. The two transmitting devices can be arranged in the surrounding area, and thus within the examination area, in such a way that the transmitted optical localization signals can detect at least part, and in particular the entire, of the surrounding area. At least one or more optical receiving elements can be arranged, in particular attached, to the portable component. Thus, the transmitted optical localization signals are received where the portable component, and therefore the patient, is located.The received optical localization signals can then be transmitted to the electronic evaluation unit via the optical transmission link. Specifically, the explanations regarding the procedure according to the first aspect also apply (analogously) to procedures according to the fourth aspect.

[0043] For example, the optical signal could be a laser signal, specifically laser light. In this case, the optical signal is emitted within a range such that these optical signals are not dangerous for the patient.

[0044] It is intended that, based on the received first optical localization signal, an angle determination between the first optical transmitter and the at least one optical receiver is performed, and based on the received second optical localization signal, an angle determination between the second optical transmitter and the at least one optical receiver is performed. Transmission information regarding the sending of the first and second optical localization signals is provided to the electronic evaluation unit and taken into account during the angle determinations. This allows the determination of the angle at which the receiver received or detected the optical signals.

[0045] In one embodiment of the further aspect (fourth aspect) it is provided that a position of the at least one optical receiving element is determined on the basis of the angle determinations, and the portable component is located on the basis of the position of the at least one optical receiving element.

[0046] In other words, optical signal processing determines the position of the receiving elements, particularly the single receiving element. Various signal processing methods, such as triangulation, can be used for this purpose. Based on the position of the receiving element, the portable component can then be located, since the receiving element is attached to or located on the portable component.

[0047] Furthermore, it is advantageous if multiple optical localization signals are emitted by various transmitters and received by multiple receivers on the portable component. This allows for the determination of multiple distances from this multitude of signals, which can then be used for position determination and, in particular, for triangulation.

[0048] In particular, based on the determined information regarding the first transmitted and received optical localization signal, a first angle determination can be performed, and analogously, a second angle determination can be performed regarding the second optical localization signal. Thus, the angle at which a respective transmitting element is positioned relative to the respective transmitting device can be determined. Triangulation or other mathematical methods can be used for this purpose. The multiple angle determinations or measurements allow for improved position determination of the receiving element and therefore better localization of the portable component.In other words, based on the transmitted signals and the respective distance between the transmitting device and the receiving element, a position and, in particular, an orientation of the receiving element or elements relative to the transmitting devices can be determined. From this, a localization, and especially a position determination, of the portable component and thus of the patient can be carried out.

[0049] In one embodiment of the further aspect (fourth aspect), it is provided that at least one synchronization signal is sent to the at least one receiving element by the first and / or second optical transmitter, and the first and second optical localization signals are received based on the synchronization signal received by the at least one receiving element. Since the transmitters can primarily be used to continuously emit the laser beam, laser signal, or laser light as an optical signal, the transmitter must be triggered or informed accordingly when a corresponding reception is required. For example, a time measurement can be performed from the moment the synchronization signal is received until an optical localization signal is received.This can in turn be used to determine the distance between the signaling equipment and the receiving equipment.

[0050] In other words, the transmitting device and the receiving element are synchronized to enable the most precise or accurate determination of the transit time.

[0051] Alternatively, a transmitter unit of the imaging modality can send a synchronization signal into the surrounding area, allowing the first and second optical transmitters to receive it. Once received, these transmitters perform a synchronization process before transmitting their respective optical localization signals. This allows the imaging modality itself to determine when to localize the wearable component and, consequently, the patient. This localization can be performed by an operator of the imaging system or by a dedicated control unit. By having the imaging modality send the synchronization signal, the need for additional transmitters is eliminated.In other words, sending the synchronization signal allows for the synchronization of the two transmitting devices and their respective transmissions. This is particularly advantageous for subsequent triangulation of the transmitted and received optical signals, enabling the most efficient determination of the receiver's position and thus the portable component's position.

[0052] In one embodiment of the further aspect (fourth aspect), it is provided that the first and second optical localization signals each sweep across the surrounding area as a laser line in a defined rhythm and with different orientations, wherein, from a point in time when the at least one synchronization signal is received, a time period is determined until at least one of the emitted laser lines is received by the receiving element, and this determined time period is taken into account in the angle determinations.

[0053] In other words, the first and second optical localization signals can each be emitted as laser lines with alternating orientations within the surrounding area. From the moment at least one synchronization signal is received, a time interval is determined until at least one of the emitted laser lines is received by the receiving element. This time interval is then taken into account when determining the angles. In other words, laser lines (for example, alternating horizontally and vertically) are emitted continuously. Once the receiving element has detected the synchronization signal, a reset or restart can be performed. From this reset point, the time interval until one of the laser lines can be detected can be determined. This time interval can then be used for angle determination. Triangulation can be used for this purpose.

[0054] The localization signals, designed as laser lines or laser signals, can cyclically sweep or scan the surrounding area. With regard to the laser lines, at least the respective angular velocity (concerning the emission) can be predetermined, i.e., known. Based on the time duration and the predetermined information regarding the laser lines, an angle can be determined from the perspective of the transmitting devices. The position of the receiver can then be determined by means of triangulation.

[0055] For example, the process just described can also be considered for multiple receiving elements. These receiving elements could be interconnected, so that the position and / or orientation of the portable component can be determined based on the individual angle measurements.

[0056] Another aspect of the invention (fifth aspect) relates to an electronic localization system for locating a portable component of an imaging system during an examination procedure of a patient using an imaging modality of the imaging system, wherein the portable component is arranged on the patient for the examination procedure. characterized by, - In particular, a first optical transmitting device which can be arranged at a distance from the imaging modality, wherein the first optical transmitting device is configured to emit at least a first optical localization signal in an area surrounding the imaging modality, - In particular, a second optical transmitting device arranged at a distance from the first optical transmitting device, which can be arranged at a distance from the imaging modality, wherein the second optical transmitting device is configured to emit at least a second optical localization signal in the vicinity of the imaging modality, - In particular, at least one optical receiving element which can be arranged on the portable component, wherein the at least one optical receiving element is configured to receive the emitted first and second optical localization signals, - In particular, an electronic evaluation unit which can be arranged outside an examination room in which the imaging modality can be arranged, wherein the electronic evaluation unit is connected to the at least one optical receiving element by means of an optical transmission link, so that the received first and second optical localization signals can be transmitted to the electronic evaluation unit, - In particular, the electronic evaluation unit, which is designed to locate the portable component based on the first and second optical localization signals.

[0057] Specifically, the statements regarding the procedure according to the fourth aspect also apply (analogously) to the localization system according to the fifth aspect.

[0058] In one embodiment of the further aspect (fifth aspect) it is provided that the first optical transmitting device is connected to the electronic evaluation unit by means of a first optical transmission path and the second optical transmitting device is connected to the electronic evaluation unit by means of a second optical transmission path, in particular that the at least one optical transmission path, the first optical transmission path and the second optical transmission path are designed as optical waveguides.

[0059] In particular, at least one optical transmission path and the other optical transmission path can be designed as optical fibers. Specifically, these can be fiber optic cables or fiber optic connections. Thus, the corresponding optical signals can be transmitted from the transmitting and receiving unit to the evaluation unit via fiber optics, for example. This optical signal transmission prevents any significant negative interference with the imaging process within the examination room. Furthermore, the influence of strong magnetic or electromagnetic fields in the examination room on signal processing can be minimized, since the fiber optics, for example, are less affected by the imaging system, and the corresponding evaluation takes place outside the examination room and outside the interfering fields.

[0060] A further aspect (sixth aspect) of the invention relates to an imaging system comprising an imaging modality, at least one portable component and an electronic localization system according to the previous aspect (fifth aspect) or an advantageous further development thereof, wherein - the first optical transmitting device is positioned at a distance from the imaging modality, - the second optical transmitting device is arranged at a distance from the first optical transmitting device and the imaging modality, - that at least one optical receiving element is arranged on the portable component, and - the electronic evaluation unit is located outside an examination room, with the imaging modality located in the examination room.

[0061] Advantageous embodiments of one aspect of the invention can be considered advantageous embodiments of one of the other aspects. In particular, advantageous embodiments of one aspect can be considered advantageous embodiments of all other aspects. The reverse is also true.

[0062] Here, the imaging system's capabilities can be used advantageously according to the third aspect.

[0063] In particular, the electronic localization system according to the second aspect can also be used with regard to the implementations of the electronic localization system of the fifth aspect. The reverse is also true.

[0064] For example, the procedure according to the first aspect can also be advantageously used to carry out the procedure according to the fourth aspect. The reverse is also true.

[0065] In particular, the electronic localization systems and / or the imaging systems may include (technical) means to execute or perform at least one of the methods of the aspects of the invention.

[0066] The invention also includes further developments of the electronic localization systems and the imaging systems according to the invention, which have features already described in connection with the further developments of the methods according to the invention. For this reason, the corresponding further developments of the electronic localization systems and the imaging systems according to the invention are not described again here.

[0067] Explanations of one aspect should be seen as advantageous explanations of the other aspect, and vice versa.

[0068] The invention also includes combinations of the features of the described embodiments.

[0069] The embodiments described below are preferred embodiments of the invention. In these embodiments, the described components each represent individual features of the invention that can be considered independently of one another. Each of these features further develops the invention independently and can therefore be considered part of the invention individually or in a combination other than that shown. Furthermore, the described embodiments can also be supplemented by other features of the invention already described.

[0070] The present invention will now be explained in more detail with reference to the accompanying drawings, which show: Fig. 1 a schematic representation of an exemplary embodiment of an imaging system which enables a localization system for locating a portable component and thus a patient within the imaging models 11; Fig. 2 another exemplary design of the localization system Fig. 1; Fig. 3. An exemplary procedure for localizing the portable component and thus the patient using the localization system from the Fig. 2; Fig. Figure 4 shows another embodiment of the localization system. Fig. 1; Fig. Figure 5 shows an exemplary process regarding localization using the localization system. Fig. 4; Fig. Figure 6 shows an exemplary representation of the arrangement of the transmitting devices of the localization system. Fig. 4 in the area of ​​an imaging modality of the imaging system from Fig. 1; Fig. 7 a schematic representation of a body coil as a portable component of an imaging system Fig. 1 and the receiving elements arranged thereon; and Fig. 8 an exemplary illustration of how to use a receiving element on the body coil Fig. 7 can be coupled via fiber optic cable in order to direct these signals outside the examination scope of the imaging system.

[0071] Fig. Figure 1 shows a schematic representation of an exemplary embodiment of an imaging system 1. The imaging system 1 can optionally be an MRI system (also known as a magnetic resonance imaging system).

[0072] The imaging system 1 comprises a magnetic unit with a field magnet 3, which generates a static magnetic field for aligning the nuclear spins of an object, for example, a patient 8, within an imaging area 12. The imaging area 12 is characterized by a highly homogeneous static magnetic field, the homogeneity referring in particular to the magnetic field strength and its amplitude. The imaging area 12 is located in a patient tunnel 2, which extends longitudinally Z through the magnetic unit. The field magnet 3 can, for example, be a superconducting magnet capable of generating magnetic fields with a magnetic flux density of up to 3 T or more. For lower field strengths, however, permanent magnets or electromagnets with normal-conducting coils can also be used. A patient table or examination table 7 can be movable within the patient tunnel 2.

[0073] Furthermore, the magnet unit comprises at least one gradient coil 5. It is also conceivable that the gradient coil 5 consists of an arrangement of several partial gradient coils.

[0074] The gradient coil 5 serves to superimpose gradient fields, i.e., location-dependent magnetic fields, onto the static magnetic field in the three spatial directions to spatially differentiate the scanned image areas within the imaging domain. The gradient coil 5 can, for example, be designed as a coil made of normally conducting wires, which can generate fields or field gradients that are orthogonal to each other within the imaging domain.

[0075] The magnetic unit comprises a transmitting coil arrangement, which may include, for example, a body coil 4 (also referred to as a whole-body coil or body coil) as a transmitting antenna configured to radiate a high-frequency signal or excitation signal into the imaging area. The body coil 4 can therefore be understood as the RF transmitting coil arrangement of the imaging system 1 or as part of the RF transmitting coil arrangement. In some embodiments, the body coil 4 can also be used to receive resonant MR signals emitted by the object. In this case, the body coil 4 can also be considered part of a signal acquisition device of the imaging system 1. Optionally, the signal acquisition device comprises a local coil 6, which may be arranged in the immediate vicinity of the object, for example, on the object or in the patient table 7.The local coil 6 can serve as a receiving coil or receiving antenna, either as an alternative or in addition to the body coil 4.

[0076] The imaging system 1 also includes a control and computing system 9. The control and computing system 9 may include a transmit-receive control unit 10, which is connected to the body coil 4, the gradient coil 5, and / or the local coil 6. Depending on the acquired MR signals, the transmit-receive control unit 10, which may include an analog-to-digital converter (ADC), can generate corresponding MR data, particularly in k-space. The transmit-receive control unit 10 may also be connected to the body coil 4 and controls it to generate RF pulses, such as excitation pulses and / or refocusing pulses. Furthermore, the transmit-receive control unit 10 of the control and computing system 9 can also be connected to and control the gradient coil 5 in order to switch layer selection gradients, gradients for frequency and / or phase coding and / or readout gradients.

[0077] For example, the MRI system 1 has an imaging modality 11. The imaging modality 11 can include at least the magnet unit, the patient table 7, and the patient tunnel 2.

[0078] To increase the safety of patient 8 during the examination using the imaging system 1 and to improve the image quality and / or image reconstruction of the images acquired by patient 8 using the imaging modality 11, it is important to know the patient's current position and / or location. The position and / or movement of the local coil 6 is particularly important. This local coil 6 is positioned directly on the patient 8, specifically attached to it, to enable the acquisition of images or scans. By tracking the local coil 6, it would be possible to work with coils that move during or between measurements, for example, when the patient 8 breathes or is repositioned for another measurement.In the second case, it might be necessary to rely on fewer adaptation sequence measurements, which could speed up the workflow.

[0079] Since the local coil 6 is a wearable component on the patient 8, localizing this local coil 6 as a wearable component 13 also allows for the corresponding localization of the patient 8. In addition to the local coil 6 as a wearable component 13, it would also be applicable if special articles of clothing, objects, or other devices that can be at least partially worn by the patient 8 were included.

[0080] To remedy this, the present invention enables improved, more efficient, and / or safer localization of the wearable component 13 and thus of the patient 8. For this purpose, an electronic localization system 100 is provided according to the invention. This electronic localization system 100 can consist of several individual components that can be integrated into the imaging system 1. The electronic localization system 100 is designed to determine the localization of the wearable component 13, and thus of the patient 8, based on optical signals, such as light beams. This has the particular advantage that it can be easily and inexpensively integrated into the imaging system 1. A further advantage is that this optical evaluation for localization has little influence on the actual measurements of the imaging system 1.The reverse is also true.

[0081] In the following Fig. Figure 2 shows a schematic representation of an exemplary embodiment of the electronic localization system 100. A possible configuration with an exemplary electronic localization system 200 is shown here. The configurations of the localization system 200 shown here can also be adapted to the localization system 100.

[0082] The localization system 200 has at least one optical transmitting element 201. It is also conceivable that the localization system 200 has further optical transmitting elements 202, 203. The optical transmitting elements 201–203 can be arranged on the imaging modality 11. The optical transmitting elements 201–203 are primarily arranged such that they can transmit optical signals within the patient tunnel 2 and thus within the imaging area 12. As in the Fig. As shown in Figure 2, the optical transmitting elements 201-203 can be arranged above the patient 8 in the area of ​​the imaging modality 11, viewed in the y-direction, so that the optical transmitting elements 201-203 can transmit optical signals towards the patient table 7 when viewed from above. In particular, at least one transmitting element 201 can transmit an optical localization signal 210. Accordingly, optical transmitting elements 202 and 203 can in turn transmit optical localization signals 211 and 213. For example, the optical localization signal 210 can be a light beam, a laser beam, or another optical signal.

[0083] In order to receive at least one emitted optical localization signal 2, the localization system 200 can have at least one optical receiving element 220. Likewise, further such receiving elements 221 and 222 can be provided. As already mentioned at the outset, the portable component 13 is to be localized. Accordingly, the receiving elements 220–222 can be designed so that they can be arranged in and / or on the portable component 13, here the localization coil 6, or attached to it.

[0084] As in the Fig. As shown in Figure 2, the patient 8 can lie on the patient table 7 and wear the portable component 13, in this case the local coil 6. The receiving elements 220-222 can be arranged on the portable component such that they are directed towards the transmitting elements 201-203. Thus, the transmitted optical localization signals 210-212 can be received by the receiving elements 220-222.

[0085] The transmitting elements 201-203 and the receiving elements 220-222 can each be connected or coupled to an electronic evaluation unit 240 of the localization system 200 via an optical transmission link 230-235. These optical transmission links 230-235 are, in particular, optical fibers, especially fiber optic cables. Thus, signal transmission can take place optically via a respective fiber. This has the advantage that such optical fibers do not interfere with the operation of the imaging system 1 due to electromagnetic fields or radiation. Since the evaluation is sensitive, the electronic evaluation unit 240 is designed so that it can be located outside an examination room 250 of the imaging system 1.

[0086] The imaging modality 11 is primarily located in this examination room 250. Consequently, strong magnetic fields are present within this examination room 250, potentially affecting imaging, and strong high-frequency signals may also occur. These could impair, and in particular distort, the processing. Therefore, optical signals from the examination room 250 are transmitted via optical fibers to the evaluation unit 240, which is located outside the examination room 250. Based on the transmitted information regarding the transmission and reception of the optical localization signals 201-203, the localization of the portable component 13 can be performed.

[0087] In particular, the localization system 200 can be used to improve image quality with respect to the imaging system 1, as it enables continuous position tracking of the wearable component 13, and thus of the patient 8, during imaging. Continuous measurement of the position of the wearable component 13, and therefore of the patient 8, allows the use of flexible coils, such as the local coil 6, which can be worn closer to the patient's body. This accelerates the scan workflow, as no adjustment sequence measurements are required. For example, the transmitting elements 201-203 can be positioned on a torus with respect to the imaging modality 11, as shown in the Fig. The transmitting elements 201-203 can be arranged schematically as shown in Figure 2. They can be designed to be visible from the inside, i.e., within the patient tunnel 2, in order to achieve the most efficient emission of the optical localization signals 210-212. These optical localization signals 210-212 can, for example, be referred to as "time-of-flight signals". These emitted signals can be received by a variety of light-receiving devices, such as the receiving elements 220-222.

[0088] In the following Fig. 3 An exemplary procedure for localizing the portable component 13 using the localization system 100, in particular the localization system 200, is explained.

[0089] In an optional step S20, patient 8 can be located in patient tunnel 2 and can have at least the portable component 13. It is also conceivable that patient 8 has several such portable components, such as multiple local coils. This depends on the measurement or examination procedure.

[0090] In the subsequent step S21, the examination process, i.e., the scanning process, of patient 8 takes place. To enable continuous localization, optical localization signals 210-212 are emitted. In particular, optical localization signals can be emitted continuously at regular intervals, especially permanently, during the examination process.

[0091] For example, the transmitting elements 201-203 can be designed or controlled in such a way that the optical localization signals 210-212 have different characteristics. The common feature is that the optical localization signals 210-212 each have different wavelengths. In particular, a differently shaped light beam or light can be emitted. In other words, the optical localization signals 210-212 can be emitted as red light, green light, blue light, or another color of light. This has the advantage that, upon reception, a precise assignment and thus selection of the received signals can be carried out. This allows it to be determined from which transmitting element 201-203 the respective received optical localization signal 210-212 was emitted.

[0092] In a subsequent optional step S23, the received optical localization signals 210-212 can be transmitted to the evaluation unit 240. Additionally, corresponding information regarding the transmission processes of the transmitting elements 201-203 can also be transmitted to the evaluation unit 240 via the optical fibers.

[0093] In an optional subsequent step S24, the evaluation unit 240 can process the localization signals 210-212. Here, a signal propagation time, i.e., a propagation delay, can first be determined or calculated for each transmitted and received localization signal 210-212 based on a propagation delay method. Using the calculated propagation delay, a respective distance 260, 261, and 262 can then be determined. For example, the distance 260 could be between the transmitting element 201 and the receiving element 220, the distance 261 between the transmitting element 211 and 221, and the distance 262 between the transmitting element 230 and 222. In other words, the distance between the respective transmitter and receiver can also be determined based on the propagation delay. Subsequently, information about the position of the receiving element 220-222 can be determined.Furthermore, the respective lengths of the optical transmission paths 230-295 can be taken into account. This, in turn, can be used to determine the signal propagation time and, in particular, the distance outside the examination room 250. In other words, the time-of-flight measurements can be performed by transmitting the optical signals via the optical fibers, which have a known length, outside the examination room 250 and calculating them there. In other words, the emitted light can be checked by determining how long it took the light to travel from a respective transmitting element 201-203 to a respective receiving element 220-222.

[0094] Trilateration can in turn determine the position of the respective receiving elements 220 - 222 and thus the position of the portable component 13.

[0095] In an optional subsequent step S25, information on this localization of the portable component 13 can be made available to the imaging system 1, thereby allowing parameters relating to imaging during imaging or parameters of reconstruction after imaging to be influenced or adjusted.

[0096] In other words, the Localization System 200 enables tracking of the coil positions of the Imaging System 1 using time-of-flight signals transmitted via fiber optics. This avoids interference from the strong magnetic field, gradients, or RF signals.

[0097] In the Fig. Figure 4 shows a further embodiment of localization system 100. Localization system 300 will now be explained in more detail. This is another possible embodiment for localizing the portable components 6 and 13. Explanations regarding localization system 200 can also be applied as for localization system 300 explained here. The reverse is also true.

[0098] The localization system 300 can now have at least two transmitting devices 301, 302. These optical transmitting devices 301, 302 can be spaced apart from each other and from the imaging modality 11 within an examination room 310. The imaging modality 11 and the transmitting devices 301, 302 are thus located within the examination room 310. These transmitting devices 301, 302 can be laser units. These can be designed as laser towers, which can be arranged, for example, in the area of ​​a wall or ceiling of the examination room 310. Fig. Figure 6 further illustrates how the transmitting devices 301, 302 can be arranged in relation to the imaging modality 11. Each of the transmitting devices 301, 302 can emit at least one optical localization signal 303, 304. Optionally, these optical localization signals, i.e., outgoing signals 303, 304, are emitted into an ambient area 320 of the imaging modality 11 and thus of the imaging system 1.

[0099] For example, the transmitting devices 301, 302 can be designed such that the localization signals 303, 304 can be emitted as laser lines. The optical localization signal 303 can be referred to as the first localization signal and the localization signal 304 can be referred to as the second localization signal.

[0100] The localization signals 303, 304 can be emitted by laser lines traversing or passing through the space, i.e., the ambient area 320, in two orientations. This means that, for example, the optical localization signal 303 is first emitted horizontally as a laser line, i.e., downwards, in the negative y-direction. Subsequently, the localization signal 303, or a similar one, can be emitted laterally, for example, in the positive or negative z-direction, using a vertical laser beam. In other words, laser light or light beams can be emitted within the ambient area 320 in a grid pattern, thereby covering the largest possible area for sensory purposes. This can be implemented accordingly by the respective transmitting device 301, 302.To receive the emitted optical localization signals 303, 304, the localization system 300 has at least one optical receiving element 330. The optical receiving element 330 can be designed similarly to the receiving elements 201 to 203 described for the localization signal system 200. However, to improve the reception of the emitted optical signals, the receiving element 330 can be designed as a receiving photodiode. The receiving element 330 can, in turn, be arranged on the surface of the portable component 13. Several such elements can be arranged accordingly. An exemplary representation of several such receiving elements 330 on the component 13 is shown, for example, in the figure. Fig. 7 are shown as examples.

[0101] As already explained in the section on the design of the localization system 200, the localization system 300 also has a corresponding electronic evaluation unit 340. This evaluation unit 340 can be designed similarly to the evaluation unit 240 and is also located outside the investigation area 310. The transmitting devices 301, 302 can be connected to the evaluation unit via optical transmission links 341, 342. These can again be similar designs to the transmission links 230 to 235. The transmitted optical signals can thus be received by the receiving element 330 and transmitted to the evaluation unit 340 via an optical transmission link 343. Optical transmission links 341 to 343 can again be fiber optic cables, i.e., not waveguides. For this, for example, in the Fig. Figure 8 shows by way of example how the optical transmission path 343, i.e. a fiber optic cable, can be optically coupled to the receiving element 330.

[0102] Based on the transmitted and received localization signals 303, 304, the position of the receiving element 330 and thus of the component 13 can be determined using the evaluation unit 340.

[0103] The localization system 300 enables, in particular, a camera-less localization method for coils, such as the local coil 6, and especially portable components 13, using a combination of laser and optical fibers. This can also be achieved with the localization systems 100 and 200.

[0104] As already mentioned, the receiving element 330 can be configured as an optical fiber. This optical fiber can have an entry aperture or opening to receive light or a laser beam as an optical localization signal. Advantageously, the fiber can be bundled with the cabling of coil 6, i.e., component 13, and connected to the receiving unit via the same connector used for receiving the RF signal from coil 6, without interfering with the RF signal.

[0105] To couple the laser signal, i.e., an optical localization signal, into the optical fiber, total internal reflection (TIR) ​​must be taken into account. The laser light should enter the fiber within the critical angle for TIR. Because of this, when using the optical fiber as the receiving element 330, a bundle of optical fibers can be used, with the entry point, for example, on the flexible coil as component 3. This allows a larger angular range to be covered for detection. The bundle of optical fibers can then be securely fixed to component 13. For example, such a bundle can be attached to a surface of component 13 using a transparent adhesive.In this way, the laser light, i.e. the optical signal, can be coupled into at least one fiber, regardless of the orientation of the laser's entry point onto the fiber bundle.

[0106] For example, the optical signal can be emitted using a laser at a frequency of 60 Hertz. This allows for a tracking frequency for the coil arrangement and patient tracking, including the detection of the patient's respiration, thus triggering a sequence for evaluation.

[0107] For example, coil 6 can be a flexible coil, so that several fiber bundles can be attached to various points on this coil.

[0108] With regard to patient tracking, it is conceivable that component 13 is a garment-like object which can be attached to patient 8 in order to locate or monitor the patient's movement and position.

[0109] The Localization System 300 achieves a high degree of positional accuracy, especially compared to existing methods. This eliminates the need for cameras, which is advantageous in terms of patient comfort and confidentiality.

[0110] The transmitting devices 301 and 302 can be configured outside the imaging modality 11. They can be positioned, for example, in front of and behind the tube. A laser signal visible to the human eye can be detected over distances of more than ten meters. It is also possible to find a compromise between the type of laser scan, which defines the tracking rate, and the exposure / degradation time at the sensor, as well as the aperture size and optical fiber. With a higher tracking rate, fewer signals reach the fiber at the same laser power. The lasers would have to be visible to the eye, which somewhat limits their power. A rapidly oscillating laser can be more powerful than a stationary laser and still be safe for the eye. Therefore, if a laser that is inherently eye-safe cannot be used, a more powerful laser that oscillates faster could be employed.

[0111] In the following Fig. Section 5 explains an exemplary procedure for how the localization of component 13, and thus of patient 8, can be carried out specifically with the localization system 300.

[0112] In an optional step S30, patient 8 can be located in patient tunnel 2 and can have at least the portable component 13. It is also conceivable that patient 8 has several such portable components, such as multiple local coils. This depends on the measurement or examination procedure.

[0113] In a subsequent optional step S31, the transmitters 301 and 302 can be controlled and, in particular, activated. This occurs especially immediately before an examination or scanning procedure on the patient 8. Specifically, the transmitters 301 and 302 can continuously emit corresponding optical signals, such as laser beams. To ensure that the receiving elements are prepared for reception, synchronization signals, in particular at least one synchronization signal, are used. This ensures that the system is synchronized for evaluation and, in particular, for localization. Two types of synchronization signals can be used. In one configuration, the two transmitters 301 and 302 can emit a synchronization pulse, which can be diffuse, in the infrared range. This pulse can cover the entire area with respect to the imaging modality 11.

[0114] At least one receiver 330, or several such receivers, can detect the synchronization pulse and then count the time until the moving laser beams are detected. Thus, a signal propagation time can be determined based on the synchronization signal and the transmitted and received localization signals 303 and 304. Specifically, a first signal propagation time can be determined for the first localization signal 303, and a second signal propagation time can be determined for a second localization signal 304.

[0115] This information can then be used to determine the angle at which the receiving element 330 is positioned or aligned with the transmitting devices 303 and 302. This can be done in an optional step S32. To obtain sufficient information about the position and orientation of component 13, it is particularly advantageous to use multiple receiving elements. Mathematical calculations, such as triangulation, can be used to locate component 13 based on the multiple angle measurements taken.

[0116] Another synchronization option is the transmission of a corresponding synchronization pulse or synchronization signal as an RF (radio frequency) signal. This can be done in an optional step S33. This signal can be transmitted, for example, by coils of the imaging system 1 and received by transmitter units 350 and 351 of the transmitters 301 and 302. Thus, the transmitters 301 and 302 can synchronize themselves based on this synchronization signal. In particular, the laser lines emitted by the examination chamber 250 can be synchronized accordingly.

[0117] In an optional step S34, based on the localization performed, an image reconstruction and / or image quality can be adjusted with regard to the imaging.

Claims

[1] Method for locating a portable component (6, 13) of an imaging system (1) during an examination procedure of a patient (8) using an imaging modality (11) of the imaging system (2), wherein the portable component (6, 13) is arranged on the patient (8) for the examination procedure, comprising: - Emitting at least one optical localization signal (210, 211, 212) in an imaging area (12) of the imaging modality (11) within which the patient (8) is located during the examination procedure, by means of at least one optical transmitting element (201, 202, 203), and - Receiving the at least one emitted optical localization signal (210, 211, 212) by at least one optical receiving element (220, 221, 222) which is arranged on the portable component (6, 13), characterized by , - Transmitting the at least one received optical localization signal (210, 211, 212) by means of an optical transmission link (230 - 235) to an electronic evaluation unit (240) which is located outside an examination room (250) in which the imaging modality (11) is arranged, and - Localizing the portable component (6, 13) based on the at least one received optical localization signal (210, 211, 212) by the electronic evaluation unit (240), wherein a signal propagation time of the transmitted and received at least one optical localization signal (210, 211, 212) is determined by the electronic evaluation unit (240) based on the at least one received optical localization signal (210, 211, 212), wherein transmission information regarding the transmission of the at least one optical localization signal (210, 211, 212) is provided to the electronic evaluation unit (240) and this is taken into account when determining the signal propagation time. [2] Method according to claim 1, wherein - based on the signal propagation time, a distance (260, 261, 262) between the at least one optical transmitting element (201, 202, 203) and the at least one optical receiving element (220, 221, 222) is determined by the electronic evaluation unit, wherein a position of the at least one optical receiving element (220, 221, 222) is determined based on the determined distance (260, 261, 262), and - based on the position of at least one optical receiving element (220, 221, 222) the portable component (6, 13) is located. [3] Method according to any one of the preceding claims, wherein - in addition to at least one optical localization signal (210, 211, 212) which has a first wavelength, at least one further optical localization signal (210, 211, 212) which has a second wavelength different from the first wavelength, is emitted with at least one further optical transmitting element (201, 202, 203), - that at least one further optical localization signal (210, 211, 212) is received by the at least one optical receiving element (220, 221, 222) or at least one further optical receiving element (220, 221, 222) which is arranged on the portable component (6, 13), - that at least one additional received optical localization signal (210, 211, 212) is taken into account when localizing the portable component (6 ,13). [4] Electronic localization system (100, 200) for localizing a portable component (6, 13) of an imaging system (1) during an examination procedure of a patient (8) using an imaging modality (11) of the imaging system (1), wherein the portable component (6, 13) can be arranged on the patient (8) for the examination procedure, characterized by , - at least one optical transmitting element (201, 202, 203) which can be arranged on the imaging modality, wherein the at least one optical transmitting element (201, 202, 203) is configured to transmit at least one optical localization signal (210, 211, 212) in an imaging area (12) of the imaging modality (11) within which the patient (8) is located during the examination procedure, - at least one optical receiving element (220, 221, 222) which can be arranged on the portable component (6, 13), wherein the at least one optical receiving element (220, 221, 222) is designed to receive at least one emitted optical localization signal (210, 211, 212), - an electronic evaluation unit (240) which can be arranged outside an examination room (250) in which the imaging modality (11) can be arranged, wherein the electronic evaluation unit (240) is connected to the at least one optical receiving element (220, 221, 222) by means of an optical transmission link (230 - 235) so that the at least one received optical localization signal (210, 211, 212) can be transmitted to the electronic evaluation unit (240), - the electronic evaluation unit (240), which is configured to locate the portable component (6, 13) on the basis of the at least one received optical localization signal (210, 211, 212), wherein, on the basis of the at least one received optical localization signal (210, 211, 212), a signal propagation time of the transmitted and received at least one optical localization signal (210, 211, 212) is determined by the electronic evaluation unit (240), wherein transmission information concerning the transmission of the at least one optical localization signal (210, 211, 212) is provided to the electronic evaluation unit (240) and this is taken into account when determining the signal propagation time. [5] Electronic localization system (100, 200) according to claim 4, wherein the at least one optical transmitting element (201, 202, 203) is connected to the electronic evaluation unit (240) by means of a further optical transmission path (230 - 235), in particular the at least one optical transmission path (230 - 235) and the further optical transmission path (230 - 235) are designed as optical waveguides. [6] Imaging system (1) comprising an imaging modality (11), at least one portable component (6, 13) and an electronic localization system (100, 200) according to claim 4 or 5, wherein - that at least one optical transmitting element (201, 202, 203) is arranged on the imaging modality (11), - that at least one optical receiving element (220, 221, 222) is arranged on the portable component (6, 13), and - the electronic evaluation unit (240) is arranged outside an examination room (250), wherein the imaging modality (11) is arranged in the examination room (250). [7] Method for locating a portable component (6, 13) of an imaging system (1) during an examination procedure of a patient (8) using an imaging modality (11) of the imaging system (1), wherein the portable component (6, 13) is positioned on the patient (8) for the examination procedure, comprising: - Emitting at least one first optical localization signal (303) in an area (320) of the imaging modality (11) by means of a first optical transmitting device (301) which is arranged at a distance from the imaging modality (11) in the area (320), - Emitting at least one second optical localization signal (304) in the surrounding area (320) of the imaging modality (11) by means of a second optical transmitting device (304) arranged at a distance from the first optical transmitting device (303) in the surrounding area (320), and - Receiving the emitted first and second optical localization signals (303, 304) by at least one optical receiving element (330) which is arranged on the portable component (6, 13), characterized by , - Transmitting the received first and second optical localization signals (303, 304) via an optical transmission link (343) to an electronic evaluation unit (340) which is located outside an examination room (310) in which the imaging modality (11) is arranged, and - Localization of the portable component (6, 13) based on the first and second optical localization signals (303, 304) by the electronic evaluation unit (340), wherein, based on the received first optical localization signal (303), an angle determination is carried out between the first optical transmitter (301) and the at least one optical receiver (330), and based on the received second optical localization signal (304), an angle determination is carried out between the second optical transmitter (302) and the at least one optical receiver (330), and transmission information regarding the transmission of the first and second optical localization signals (303, 304) is provided to the electronic evaluation unit (340), and this is taken into account in the angle determinations. [8] Method according to claim 7, wherein a position of the at least one optical receiving element (330) is determined on the basis of the angle determinations, and the portable component (6 ,13) is located on the basis of the position of the at least one optical receiving element (330). [9] Method according to claim 7 or 8, wherein at least one synchronization signal is sent to the at least one receiving element (330) by the first and / or second optical transmitting device (301, 302), wherein the reception of the first and second optical localization signal (303, 304) is carried out on the basis of the synchronization signal received by the at least one receiving element (330). [10] Method according to claim 9, wherein the first and second optical localization signals (303, 304) each sweep over the surrounding area (320) as a laser line alternately oriented in a defined rhythm, wherein from a time of receipt of the at least one synchronization signal a time period is determined until at least one of the emitted laser lines is received by the receiving element, wherein this determined time period is taken into account in the angle determinations. [11] Electronic localization system (100, 300) for localizing a portable component (6, 13) of an imaging system (1) during an examination procedure of a patient (8) using an imaging modality (11) of the imaging system (1), wherein the portable component (6, 13) is positioned on the patient (8) for the examination procedure, characterized by , - a first optical transmitting device (301) which can be arranged at a distance from the imaging modality (11), wherein the first optical transmitting device (301) is configured to transmit at least a first optical localization signal (303) in an area (320) surrounding the imaging modality (11), - a second optical transmitting device (302) arranged at a distance from the first optical transmitting device (301), which can be arranged at a distance from the imaging modality (11), wherein the second optical transmitting device (302) is configured to emit at least a second optical localization signal (304) in the area (320) surrounding the imaging modality (11), - at least one optical receiving element (330) which can be arranged on the portable component (6, 13), wherein the at least one optical receiving element (330) is configured to receive the emitted first and second optical localization signals (303, 304), - an electronic evaluation unit (340) which can be arranged outside an examination room (310) in which the imaging modality (11) can be arranged, wherein the electronic evaluation unit (430) is connected to the at least one optical receiving element (330) by means of an optical transmission link (343) so that the received first and second optical localization signals (303, 304) can be transmitted to the electronic evaluation unit (340), - the electronic evaluation unit (340), which is configured to locate the portable component (6, 13) on the basis of the first and second optical localization signals (303, 304), wherein, based on the received first optical localization signal (303), an angle determination is carried out between the first optical transmitting device (301) and the at least one optical receiving element (330), and based on the received second optical localization signal (304), an angle determination is carried out between the second optical transmitting device (302) and the at least one optical receiving element (330), and transmission information relating to the transmission of the first and second optical localization signals (303, 304) is provided to the electronic evaluation unit (340), and this is taken into account in the angle determinations. [12] Electronic localization system (100, 300) according to claim 11, wherein the first optical transmitting device (301) is connected to the electronic evaluation unit (340) by means of a first optical transmission path (342) and the second optical transmitting device (302) is connected to the electronic evaluation unit (340) by means of a second optical transmission path (341), in particular the at least one optical transmission path (343), the first optical transmission path (342) and the second optical transmission path (341) are designed as optical waveguides. [13] Imaging system (1) comprising an imaging modality (11), at least one portable component (6, 13) and an electronic localization system (100, 300) according to claim 11 or 12, wherein - the first optical transmitting device (301) is arranged at a distance from the imaging modality (11), - the second optical transmitting device (302) is arranged at a distance from the first optical transmitting device (301) and from the imaging modality (11), - that at least one optical receiving element (330) is arranged on the portable component (6, 13), and - the electronic evaluation unit (340) is arranged outside an examination room (310), wherein the imaging modality (11) is arranged in the examination room (310).

Images