Surgical microscope system and corresponding devices, methods and computer programs

Abstract

Examples relate to a surgical microscope system and corresponding apparatus, method and computer program. The surgical microscope system comprises one or more sensors for providing sensor information about a balance of the surgical microscope system. The surgical microscope system comprises one or more brakes for holding at least one component of the surgical microscope system in a correct position. The surgical microscope system comprises a surgical microscope. The surgical microscope system comprises a processing module configured to process the sensor information. The processing module is configured to determine information about a balance of the surgical microscope system. In some embodiments, the processing module is configured to provide a warning to a user of the surgical microscope system based on the information about the balance of the surgical microscope system. The warning indicates a risk of imbalance in the surgical microscope system. Alternatively or additionally, the processing module can be configured to control a release of the one or more brakes based on the information about the balance of the surgical microscope system.

Description

TECHNICAL FIELD

[0001] Examples relate to a surgical microscope system and corresponding apparatus, method and computer program. BACKGROUND

[0002] Surgical microscope systems are typically designed such that the optical carrier, i.e. the surgical microscope, can be moved as easily and smoothly as possible, ideally providing a feeling of weightlessness. To achieve this, the balance of the optical carrier can be maintained by various means. However, when an accessory such as an external camera is added or a physical readjustment of a component such as an ocular is made, it can be more difficult to achieve the balance. To simplify the process or the balancing, some microscopes provide an automatic balancing function. For example, patent documents EP 1326115 A1, DE 10 2008 011638 A1 and DE 4320443 C2 show such a function. Using this function, the user can not need to put in effort or spend time to balance the microscope.

[0003] While the balancing of the optical carrier can be achieved automatically, the automatic balancing function often relies on the user perceiving an imbalance and triggering the automatic balancing function. For small imbalances, this can not be a problem, as the surgical microscope system can remain stable enough. However, in case of larger imbalances, the surgeon can be surprised by a sudden movement of the surgical microscope system, as they release the brake of the arm that holds the optical carrier while expecting the optical carrier to remain in the same position.

[0004] There can be a need for an improved surgical microscope system, wherein an imbalance of the surgical microscope system is avoided or mitigated. SUMMARY

[0005] Examples can relate to a method for avoiding a situation in which a microscope suddenly moves due to an imbalance. Embodiments are based on the finding that one or more sensors can be employed to obtain information about the balance of the surgical microscope. If a danger of an imbalance is detected, a warning can be provided to the user of the surgical microscope system, enabling the user to take countermeasures, or an override of the brake control can be made, avoiding the situation in which a sudden movement occurs.

[0006] Embodiments of the present disclosure provide a surgical microscope system. The surgical microscope system comprises one or more sensors for providing sensor information about the balance of the surgical microscope system. The surgical microscope system comprises one or more brakes for holding at least one component of the surgical microscope system in place. The surgical microscope system comprises a surgical microscope. The surgical microscope system comprises a processing module configured to process the sensor information. The processing module is configured to determine information about the balance of the surgical microscope system. In some embodiments, the processing module is configured to provide a warning to a user of the surgical microscope system based on the information about the balance of the surgical microscope system. The warning indicates a risk of imbalance of the surgical microscope system. Alternatively or additionally, the processing module can be configured to control the release of the one or more brakes based on the information about the balance of the surgical microscope system. By determining the information about the balance based on the sensor information, an impending imbalance can be detected in time. Once this condition is detected, the user can be warned, or the brake release can be overridden to avoid a situation in which the surgical microscope system experiences a sudden movement.

[0007] In some embodiments, the processing module is configured to determine the information about the balance of the surgical microscope system in response to the release of the one or more brakes of the surgical microscope system. This can provide a determination of the information about the balance at a point in time at which the risk of imbalance is elevated.

[0008] Alternatively, the processing module can be configured to continuously determine the information about the balance of the surgical microscope system. This can provide continuous monitoring of the balance of the surgical microscope system.

[0009] In at least some embodiments, the surgical microscope system comprises an output module for providing a warning to a user of the surgical microscope system. The warning can be provided via the output module. The user can receive the warning via the output module, taking action to correct the imbalance.

[0010] For example, the output module can comprise a light or a display. The warning can be provided as a visual warning. For example, the light or display can be placed in the field of view of the user / surgeon, so that it can be perceived even if the user / surgeon is focused on their work.

[0011] Additionally or alternatively, the output module can comprise an audio output module. The warning can be provided as an audio warning. Thus, the warning can be provided without the surgeon / user having to remove their eyes from the surgery.

[0012] Additionally or alternatively, the output module can comprise a haptic feedback actuator. The warning can be provided as haptic feedback. For example, the haptic feedback can be provided when the user / surgeon is holding the handle of the surgical microscope.

[0013] In some embodiments, the processing module can be configured to dim or deactivate the illumination or video display of the surgical microscope system as a warning to a user of the surgical microscope system. In this case, the existing output module can be re-adjusted for providing this warning.

[0014] In various embodiments, the processing module is configured to at least partially and / or temporarily prevent the release of the one or more brakes based on the information about the balance of the surgical microscope system. This can limit the movement of the surgical microscope being performed to avoid the surgical microscope system losing balance.

[0015] In some embodiments, the surgical microscope system can comprise an automatic balancing system for balancing the surgical microscope system. The warning can require the user to initiate the automatic balancing system. By activating the automatic balancing system, any imbalance can be corrected.

[0016] The one or more sensors can comprise one or more elements of the group of one or more torque sensors, one or more weight sensors, one or more accelerometers, one or more position sensors, one or more angle sensors, one or more rotation sensors. Various types of sensors or combinations of sensors can be used to provide the information about the balance.

[0017] In some embodiments, the surgical microscope system can comprise an arm. The one or more brakes can be adapted to hold the arm in place. The surgical microscope can be attached to the arm. Determining the information about the balance of the surgical microscope system can comprise determining a speed of movement of the arm. For example, if the speed of movement is above a threshold value, the imbalance can necessitate the warning to be issued.

[0018] Embodiments of the present disclosure further provide a (corresponding) apparatus for a surgical microscope system. The surgical microscope system comprises one or more brakes for holding at least one component of the surgical microscope system in place. The surgical microscope system comprises a surgical microscope. The apparatus comprises an interface for communicating with one or more components of the surgical microscope system. The apparatus comprises a processing module configured to obtain sensor information about the balance of the surgical microscope system from one or more sensors of the surgical microscope system. The processing module is configured to process the sensor information. The processing module is configured to determine information about the balance of the surgical microscope system. In some embodiments, the processing module is configured to provide a warning to a user of the surgical microscope system based on the information about the balance of the surgical microscope system. The warning indicates a risk of imbalance of the surgical microscope system. Alternatively or additionally, the processing module can be configured to control the release of the one or more brakes based on the information about the balance of the surgical microscope system.

[0019] Embodiments of the present invention further provide a (corresponding) method for a surgical microscope system. The surgical microscope system comprises one or more brakes for holding at least one component of the surgical microscope system in place. The surgical microscope system comprises a surgical microscope. The method comprises obtaining sensor information about the balance of the surgical microscope system from one or more sensors of the surgical microscope system. The method comprises processing the sensor information. The method further comprises determining information about the balance of the surgical microscope system. In some embodiments, the method comprises providing a warning to a user of the surgical microscope system based on the information about the balance of the surgical microscope system. The warning indicates a risk of imbalance in the surgical microscope system. Alternatively or additionally, the method can comprise controlling the release of the one or more brakes based on the information about the balance of the surgical microscope system.

[0020] Embodiments of the present disclosure further provide a (corresponding) computer program having a program code for performing the method, when the computer program is executed on a processor. BRIEF DESCRIPTION OF DRAWINGS

[0021] Some examples of apparatuses and / or methods will hereinafter be described in the context of examples only, and by way of illustration, and not limitation, and in connection with the accompanying drawings, of which:

[0022] Figure 1 schematic block diagrams of a surgical microscope system and an apparatus for a surgical microscope system are shown;

[0023] Figure 2 flowcharts of embodiments of a method for a surgical microscope system are shown; and

[0024] Figure 3 further block diagrams of embodiments of a surgical microscope system are shown. DETAILED DESCRIPTION

[0025] Various examples will now be described more fully with reference to the accompanying drawings in which some examples are illustrated. In the figures, the thicknesses of lines, layers and / or regions can be exaggerated for the clarity.

[0026] Therefore, although further examples can be modified and varied, some specific examples thereof will be shown in the accompanying drawings and described in detail. However, this detailed description does not limit further examples to the particular form described. Further examples can cover all modifications, equivalents, and alternatives falling within the scope of the disclosure. Identical or similar numbers refer to identical or similar elements throughout the description of the figures, which can be implemented identically or in modified form when compared to each other, when providing the same or similar functions.

[0027] It shall be understood that when an element such as A is referred to as being "connected" or "coupled" to another element such as B, it can be directly connected or coupled to the other element or intervening elements can be present. If two of A and B are used in "or" combinations, this disclosure also encompasses the appropriate use of "and / or" where valid. For example, a reference to "A and / or B" shall be construed as meaning either A alone, B alone, or A and B an alternative wording for the same combination is "at least one of A and B".

[0028] The terminology used herein for the purpose of describing particular examples is not intended to be limiting for further examples. Whenever a singular form such as "a", "an" and "the" is used in conjunction with a term such as "comprising", "including", "containing", "having" or "including", it is contemplated that the further example also can comprise a plurality of the elements or a plurality of the elements in combination with other elements, unless such combination is not possible or expressly defined otherwise. Likewise, whenever a specific number of an element is used, it is contemplated that further examples can use either a greater or lower number of that element, unless such a higher or lower number of that element is not possible or expressly defined otherwise.

[0029] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this example belongs.

[0030] Figure 1 A schematic block diagram of a surgical microscope system 100 is shown. The surgical microscope system 100 comprises one or more sensors 120 for providing sensor information about the balance of the surgical microscope system 100. The surgical microscope system 100 comprises one or more brakes 165 for holding at least one component of the surgical microscope system in the correct position. The surgical microscope system 100 comprises a surgical microscope 170.

[0031] Optionally, the surgical microscope system can comprise an arm 160. The arm 160 can comprise two or more components which are separated by one or more hinges, which allow for flexible positioning of the arm 160. The surgical microscope 170 can be attached to the arm 160. For example, at least one of the one or more brakes can be a brake for the arm 160, e.g. part of a hinge of the arm. Thus, the one or more brakes can be adapted to hold the arm 160 of the surgical microscope system in the correct position. Optionally, the surgical microscope system further can comprise an output module 130. The surgical microscope system further can comprise an illumination 140 and / or a video display 150.

[0032] The surgical microscope system 100 comprises a processing module 114 coupled to the one or more sensors and optionally to at least one of the one or more brakes, output module, illumination and video display, e.g. via the interface 112. Figure 1 It is further shown that the apparatus 110 comprising the processing module 114 and the interface 112 is coupled to the processing module 114. For example, the apparatus can be suitable for controlling a surgical microscope system, e.g. the apparatus 110 can be a control apparatus of a surgical microscope system. The processing module 114 is configured to process sensor information. The processing module is configured to determine information about the balance of the surgical microscope system 100. In some embodiments, the processing module is configured to provide a warning to a user of the surgical microscope system 100 based on the information about the balance of the surgical microscope system 100. The warning indicates a risk of imbalance in the surgical microscope system 100. Alternatively or additionally, the processing module can be configured to control the release of the one or more brakes based on the information about the balance of the surgical microscope system 100.

[0033] Embodiments of the present disclosure relate to a surgical microscope system, or to an apparatus, method or computer program for a surgical microscope system. Generally, a microscope is an optical instrument suitable for inspecting objects that are too small to be examined by the human eye (alone). For example, a microscope can provide optical magnification of an object, such as a sample of organic tissue. A surgical microscope is a microscope that is used during surgery, i.e. a microscope that is suitable for use (by a surgeon) during surgery. Such a surgical microscope system typically comprises an arm or positioning device for positioning the surgical microscope according to the needs of the surgeon, e.g. close to the surgical space, so that the surgical microscope can be used to provide a magnified view of the wound or tissue. Such an arm or positioning device is typically adapted to provide a plurality of different positions and / or angles in order to provide the surgeon with sufficient space to perform surgery while providing a magnified image of the surgical site. Furthermore, the arm or positioning device of a surgical microscope system is typically designed to facilitate positioning of the surgical microscope, e.g. using weights and counterweights, using a pneumatic system or using a motor to support movement of the arm or positioning device of the surgical microscope system. As movement is typically supported by such support systems, the surgeon can not “feel” when the surgical microscope system is out of balance, e.g. when the surgical microscope is moved to a position where the lever effect is too large to be compensated by the surgical microscope system. Embodiments of the present disclosure can detect such situations and provide a pre-warning or mitigate the upcoming imbalance. This is especially valuable if one or more additional devices, such as a monitor or an additional camera, are attached to the surgical microscope 170.

[0034] The surgical microscope system 100 includes one or more sensors 120 for providing sensor information regarding the balance of the surgical microscope system 100. The one or more sensors can be used to detect indications of an impending imbalance. For example, the one or more sensors 120 include one or more elements of the group of one or more torque sensors, one or more weight sensors, one or more accelerometers, one or more position sensors, one or more angle sensors, and one or more rotation sensors (e.g., implemented by a gyroscope). The one or more angle sensors and / or the one or more rotation sensors can be included in one or more components of the arm 160. For example, the one or more torque sensors can be used to provide information regarding the torque experienced at one or more hinges of the arm 160. Thus, the sensor information regarding the balance of the surgical microscope system 100 can include sensor information regarding the torque experienced at one or more hinges of the arm 160. For example, the one or more position sensors can be used to provide information regarding the current position of the surgical microscope 170 and / or information regarding the current position or orientation of one or more components of the arm 160. The one or more angle sensors and / or the one or more rotation sensors can be used for similar purposes to provide information regarding the current position of the surgical microscope 170 and / or information regarding the current position or orientation of one or more components of the arm 160. Thus, the sensor information regarding the balance of the surgical microscope can include information regarding the current position of the surgical microscope 170 and / or information regarding the current position or orientation of one or more components of the arm 160. For example, the one or more accelerometers can be used to provide information regarding the movement of one or more components of the arm and / or information regarding the vibration of the arm (caused by an imbalance of the surgical microscope system). Thus, the sensor information regarding the balance of the surgical microscope can include information regarding the movement of one or more components of the arm and / or information regarding the vibration of the arm. For example, the one or more weight sensors can be used to determine information regarding the weight of the surgical microscope (including equipment attached to the surgical microscope). Thus, the sensor information regarding the balance of the surgical microscope can include information regarding the weight of the surgical microscope. As noted above, multiple sensors or sensor types can be used. Thus, the sensor information regarding the balance of the surgical microscope system 100 can include sensor information from one or more different types of sensors.

[0035] The processing module 114 is configured to process the sensor information in order to determine information about the balance of the surgical microscope system 100. For example, the processing module 114 can be configured to scan the sensor information for indications of an impending imbalance. For example, the processing module 114 can be configured to detect a torque that exceeds a torque threshold. If the torque threshold is exceeded, the surgical microscope system can be in danger of becoming unbalanced. For example, the processing module can be configured to detect a positioning of the surgical microscope or a positioning of one or more components of the arm that has an elevated risk of imbalance. If the weight of the surgical microscope exceeds a weight threshold, the positioning of the arm can increase the risk of imbalance. If such a positioning is detected, the surgical microscope system can be in danger of becoming unbalanced. For example, the processing module can be configured to detect a vibration of the arm that exceeds a vibration threshold. This can indicate, in addition to a positioning of the surgical microscope or a positioning of one or more components of the arm that has an elevated risk of imbalance, that the surgical microscope system is also in danger of becoming unbalanced. For example, the processing module can be configured to detect a movement of the arm (e.g., a speed of movement) that exceeds a speed threshold. In other words, determining information about the balance of the surgical microscope system 100 can include determining a speed of movement of the arm 160. In this case, an actual imbalance can be detected. Again, multiple indications can be combined to determine whether the surgical microscope system is in danger of becoming unbalanced (or has reached an unbalanced state).

[0036] Generally, the information about the balance of the surgical microscope system can indicate whether (or that) the surgical microscope system 100 is in danger of losing its balance. In this case, the danger of losing balance can be conditional - for example, the information about the balance of the surgical microscope system can indicate that the surgical microscope system 100 is in danger of losing its balance if one or more brakes are released, if the position of the surgical microscope changes by more than a threshold, if additional weight is added to the surgical microscope, etc. In some embodiments, the information about the balance can include a binary indication of an impending imbalance - for example, if the surgical microscope system is in danger of becoming unbalanced, the information about the balance can provide a "true" value, and if the surgical microscope system is not in danger of becoming unbalanced, a "false" value can be provided. Alternatively, ternary information can be provided - a first severity level indicating that the surgical microscope system is in a balanced state, a second severity level indicating that the surgical microscope system is slightly unbalanced, and a third severity level indicating that the surgical microscope system is severely unbalanced. In addition, the information about the balance of the surgical microscope system can include information about the source of the imbalance or information about appropriate remedies for avoiding or remedying the imbalance.

[0037] When the information about the balance is determined, different options can be chosen. In some cases, the information about the balance can be determined at a moment in time when the risk of imbalance is the largest, for example when one or more brakes are released. In other words, the processing module 114 can be configured to determine the information about the balance of the surgical microscope system 100 in response to the release of one or more brakes of the surgical microscope system 100, for example in response to a received command relating to the release of the brakes. For example, the release of the brakes can be delayed until after the information about the balance of the surgical microscope system is determined. For example, the brakes can only be released when the risk of imbalance is smaller than a threshold. Alternatively, the brakes can be released after a warning is provided, or when the safety measure of the brakes is reactivated in case of a sudden movement of the surgical microscope.

[0038] Alternatively, the information about the balance of the surgical microscope system can be continuously (e.g. periodically) updated, for example to detect changes in the balance due to external weight or load applied on the surgical microscope system, or to detect rolling movements of the surgical microscope system. In other words, the processing module 114 can be configured to continuously determine the information about the balance of the surgical microscope system 100.

[0039] In some embodiments, based on the information about the balance of the surgical microscope system 100, a warning can be provided to a user of the surgical microscope system, for example a surgeon. For example, if the surgical microscope system is unbalanced, at risk of becoming unbalanced, a warning can be provided to the user, and / or the user is warned of an action that will / may cause the imbalance. The warning thus indicates a risk of imbalance in the surgical microscope system 100. In some embodiments, the warning can only indicate that there is a general risk of imbalance, for example without providing specific details of the source of the imbalance. In this case, the user can be more careful when releasing the brakes of the surgical microscope system. Alternatively, the warning can indicate one or more sources of the (imminent) imbalance, or one or more courses of action to be taken to avoid or correct the imbalance. Additionally or alternatively, in the warning, two or more severity levels can be distinguished, for example a first severity level warning of a slight imbalance, and a second severity level warning of a risk due to a severe imbalance. The warning can indicate the severity level, for example by different colors (yellow and red), different descriptions or symbols, or different pictograms. In some embodiments, a third severity level can also be indicated, indicating a state of the balance of the surgical microscope system, for example in the form of a green light or a positive pictogram.

[0040] Generally, the warning can be provided via one or more different means, e.g. visual, audible or tactile means. Thus, the warning can use one or more components of the surgical microscope system. For example, the surgical microscope system can comprise an output module 130 for providing a warning for a user of the surgical microscope system 100. The warning can be provided via the output module 130.

[0041] For example, the warning can be provided as or comprise a visual warning. Thus, the output module can comprise a light (e.g. a light emitting diode) or a display (e.g. a video display or a status display). Alternatively, an existing visual output module can be repurposed for providing the visual warning. For example, the processing module 114 can be configured to dim, modulate (e.g. pulse) or deactivate an illumination 140 (e.g. a spot illumination of a patient, or a background illumination) or a video display 150 of the surgical microscope system 100 as a warning for a user of the surgical microscope system 100. For example, the video display can be a display of a (digital) viewfinder of the surgical microscope system, or a display of an overview display of the surgical microscope system.

[0042] Alternatively or additionally, the warning can be or comprise an audio or audible warning, i.e. provided as an audio warning. Thus, the output module 130 can comprise an audio output module. For example, the warning can be provided as an alarm sound, or as a speech text providing a warning message or an instruction message. The sound intensity, frequency and repetition rate of the audio warning can be indicative of the severity of the imbalance.

[0043] Both (or one of) the visual and audio warnings can be used to provide instructions to a user of the surgical microscope system, e.g. to be careful when operating the surgical microscope system, or to specifically instruct how to move the surgical microscope to reach a balanced state. Additionally or alternatively, the warning can be related to an automatic balancing function. For example, the surgical microscope system 100 can comprise an automatic balancing system for balancing the surgical microscope system 100. The warning can request the user to initiate the automatic balancing system. Different options are possible, depending on parameters such as the severity of the imbalance and user preferences. In some embodiments, the warning can suggest the user to initiate the automatic balancing process. For example, the request can be provided as a visual or audio / audible warning. Or, the user can be forced to initiate the automatic balancing process, e.g. by not allowing to release the brake, or to shut off other microscope functions such as illumination or video. In some embodiments, the automatic balancing can be performed automatically, e.g. as soon as the processing module assumes that the user has finished adjusting the arm.

[0044] Alternatively or additionally, the warning can be provided as haptic feedback. For example, the output module 130 can comprise a haptic feedback actuator, e.g. a vibration module. For example, the haptic feedback actuator can be integrated in a handle of the surgical microscope. Thus, the warning is provided as haptic feedback, e.g. as vibration feedback.

[0045] Alternatively or additionally, one or more brakes can be controlled (by the processing module) to avoid or limit sudden movements of the surgical microscope. The surgical microscope system 100 comprises one or more brakes 165 suitable or configured to hold / retain at least one component of the surgical microscope system in the correct position. For example, the one or more brakes can be suitable or configured to hold the entire surgical microscope system in the correct position. For example, the one or more brakes can be or comprise one or more brakes for braking one or more wheels of the surgical microscope system, e.g. one or more wheels for moving (the entire) surgical microscope system over a floor. In some embodiments, only a component of the surgical microscope system can be held in the correct position, e.g. via an arm 160 or positioning device of the surgical microscope system. For example, the one or more brakes 165 can be suitable to hold the arm 160 in the correct position. For example, the one or more brakes 165 can be or comprise one or more brakes suitable or configured to hold the arm 160 of the surgical microscope system 100 in the correct position. These brakes can be released when the surgical microscope 170 is to be moved. Once the one or more brakes are released, the positioning or orientation of the arm 160 can be adjustable, enabling to change the position of the surgical microscope 170 attached to the arm 160. In at least some embodiments, the brakes can be released using one or more buttons arranged on one or more handles of the surgical microscope. Once the button(s) are released, the brakes can be (re)activated.

[0046] The processing module can be configured to control the release of the one or more brakes based on the information about the balance of the surgical microscope system 100. For example, the processing module can be configured to override the control of the one or more brakes based on the information about the balance of the surgical microscope system. If the information about the balance of the surgical microscope system indicates a risk of imbalance, the processing module can be configured to limit the operation of the brakes, for example to re-engage the brakes if the surgical microscope is moved downwards beyond a predetermined distance, or to limit the positioning of the surgical microscope away from the patient. For example, the brake override can be complete, i.e. the brake release button can be rendered inactive, or partial, i.e. the brakes can be released only partially to prevent fast or large movements, or temporary, e.g. the brakes can be released but re-engaged after a period of time or movement, e.g. after 0.1 seconds or 1 cm of movement, so that the user is aware of the situation but potentially dangerous situations can be avoided. In other words, the processing module 114 can be configured to, based on the information about the balance of the surgical microscope system 100, prevent the release of the one or more brakes at least partially (e.g. so that the one or more brakes can not be fully opened and allow operation of the surgical microscope with a larger force as needed) and / or temporarily (e.g. until a warning is provided, or for a short period of time or distance increment) if the information about the balance of the surgical microscope system indicates a risk of imbalance. For example, the release of the one or more brakes can be initiated or triggered by a user. Thus, the processing module can be configured to control, limit, prevent and / or override the release of the one or more brakes initiated by the user. If the user decides that the imbalance is not too severe and decides to continue, e.g. by continuing to press the brake release button, the system can eventually allow the user to release the brakes after a few or multiple iterations of brake activation-deactivation.

[0047] The interface 112 can correspond to one or more inputs and / or outputs for receiving and / or transmitting information, which can be digital (bit) values according to a specified code, within a module, between modules, or between modules of different entities. For example, the interface 12 can comprise interface circuitry configured to receive and / or transmit information. In embodiments, the processing module 114 can be implemented using one or more processing units, one or more processing devices, any means for processing, such as a processor, a computer or a programmable hardware component being operable with a respective adapted software. In other words, the described functionality of the processing module 114 can also be implemented in software, which is then executed on one or more programmable hardware components. Such hardware components can include a general purpose processor, a Digital Signal Processor (DSP), a micro-controller, etc.

[0048] In connection with the proposed concept or one or more examples described above or below (e.g. Figure 2or 3) more details and aspects of the surgical microscope system or device for a surgical microscope system are mentioned. The surgical microscope system or device for a surgical microscope system can comprise one or more additional optional features, corresponding to one or more aspects of the presented concept or one or more examples described above or below.

[0049] Figure 2 A flowchart of an embodiment of a (corresponding) method for a surgical microscope system is shown. The method for a surgical microscope system can be implemented, for example, similar to the surgical microscope system Figure 1 The method comprises obtaining 210 sensor information about the balance of the surgical microscope system 100 from one or more sensors 120 of the surgical microscope system 100. The method comprises processing 220 the sensor information. The method comprises determining 230 information about the balance of the surgical microscope system 100. In some embodiments, the method comprises providing 240 a warning to a user of the surgical microscope system 100 based on the information about the balance of the surgical microscope system 100. The warning indicates a risk of imbalance in the surgical microscope system 100. Additionally or alternatively, the method can comprise controlling 250 the release of one or more brakes based on the information about the balance of the surgical microscope system 100.

[0050] As described above, features described in connection with the surgical microscope system 100 can equally apply to the method. Figure 1 As described above, features described in connection with the surgical microscope system 100 can equally apply to the method. Figure 2 As described above, features described in connection with the surgical microscope system 100 can equally apply to the method.

[0051] More details and aspects of the method are mentioned in connection with the presented concept or one or more examples described above or below (e.g. Figure 1 or 3). The method can comprise one or more additional optional features, corresponding to one or more aspects of the presented concept or one or more examples described above or below.

[0052] At least some embodiments relate to the safety of microscope balancing. Embodiments can provide a technical approach for avoiding situations in which a microscope suddenly moves due to imbalance. At least some embodiments can enable a microscope to assess the balancing conditions and automatically take action to prevent dangerous situations.

[0053] Figure 3A further block diagram of an embodiment of a surgical microscope system 300 is shown. The surgical microscope system comprises a base unit 310, a control device 110, an arm 160 with three brakes 165 integrated in the hinges of the arm 160, a surgical microscope 170 and two displays 150, one of which is located near the oculars, the other, larger display. Two handles 320 are attached to the surgical microscope 170, each handle comprising a brake release button 325. The surgical microscope system 300 further comprises sensors 130a-b.

[0054] The balance condition (e.g. information determining the balance of the surgical microscope system) can be assessed in various ways:

[0055] For example, the balance condition can be assessed by sensors such as torque sensor 130d and weight sensor 130c or a combination thereof. They can provide a continuous measurement of the balance condition when the microscope is not in use.

[0056] Alternatively or additionally, the balance condition can be assessed by very fast measurements of the movement when the arm brakes are released. This can be done by sensors such as accelerometers 130b or position / rotation sensors such as gyroscopes 130a. To a certain extent, the imbalance can not be detected technically, but how fast the microscope is moving. If this assessment is done fast enough, it can provide a more direct assessment of the risk. The measurement can be done within a few milliseconds, and if the microscope is moving too fast, the brakes can be reactivated soon.

[0057] The information of the balance condition (i.e. the balance information of the surgical microscope system) can be used to trigger different actions:

[0058] For example, the warning can take any combination of the following forms:

[0059] - A visual indication / warning can be shown, e.g. a red light / symbol indicating an unbalanced microscope, a green color indicating a balanced microscope, or via the displays 150. At reference sign 330, a pictogram is shown displayed by one of the displays, indicating that the balance status is normal and that the surgical microscope system is balanced. At reference sign 340, a warning pictogram is shown, indicating a slight imbalance. At reference sign 350, a danger pictogram is shown, indicating a severe imbalance.

[0060] - An audio warning can be given. The sound intensity, frequency and repetition rate of the audio warning can indicate the severity of the imbalance.

[0061] - A haptic feedback (vibration) can be given to warn the user, e.g. when the user touches the handles 320 or the brake release buttons 325.

[0062] - Other microscope functions can be adjusted. For example, illumination can be reduced or turned off, or the video display can be dimmed or turned off.

[0063] Additionally or alternatively, the user’s command to release the brake can be overridden. This override can be complete, i.e. the brake release button can become inactive, partial, i.e. the brake can be released only partially, to prevent fast or large movements, or temporary, e.g. the brake can be released but re-engage after a period of time or movement, e.g. after 0.1 seconds or 1 cm of movement, to give the user a chance to assess the situation but can avoid a potentially dangerous situation. If the user judges that the imbalance is not severe enough and wants to continue, and continues to press the brake release button, the system can eventually allow the user to release the brake after a few activation-deactivation iterations.

[0064] In some embodiments, the surgical microscope system can be used for an automatic balancing function. Depending on parameters such as the severity of the imbalance and user preferences, different options are possible:

[0065] - The automatic balancing can be performed automatically. For example, when the balance is disturbed and the user is not holding the handle, and after a predetermined time, e.g. 10 seconds, the microscope can assume that the user has finished the current change, indicating an opportunity to rebalance.

[0066] - The user is advised to initiate the automatic balancing process, e.g. as part of a warning.

[0067] - The user is forced to initiate the automatic balancing process by not allowing the release of the brake or by turning off other microscope functions, such as illumination or video.

[0068] As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items and can be abbreviated as “ / ”.

[0069] Although some aspects have been described in the context of an apparatus, it is clear that separate aspects also represent a description of the corresponding method, where a block or device corresponds to a method step or a feature of a method step. Analogously, aspects described in the context of a method step also represent a description of a corresponding block or item or feature of a corresponding apparatus. Some or all of the method steps can be performed by (or using) a hardware apparatus, like for example, a processor, a microprocessor, a programmable computer or electronic circuit. In some embodiments, some one or more of the most important method steps can be performed by such an apparatus.

[0070] Depending on certain implementation requirements, embodiments of the application can be implemented in hardware or in software. The implementation can be performed using a non-transitory storage medium such as a digital storage medium, for example a floppy disc, a DVD, a Blu-Ray, a CD, a ROM, a PROM, and EPROM, an EEPROM or a FLASH memory, having electronically readable control signals stored thereon, which cooperate (or are capable of cooperating) with a programmable computer system such that the respective method is performed. Therefore, the digital storage medium can be computer readable.

[0071] Some embodiments according to the application comprise a data carrier having electronically readable control signals, which are capable of cooperating with a programmable computer system, such that one of the methods described herein is performed.

[0072] Generally, embodiments of the present application can be implemented as a computer program product with a program code, the program code being operative for performing one of the methods when the computer program product runs on a computer. The program code can for example be stored on a machine readable carrier.

[0073] Other embodiments comprise the computer program for performing one of the methods described herein, stored on a machine readable carrier.

[0074] In other words, an embodiment of the inventive method is, therefore, a computer program having a program code for performing one of the methods described herein, when the computer program runs on a computer.

[0075] A further embodiment of the inventive methods is, therefore, a data carrier (or a digital storage medium, or a computer-readable medium) comprising, recorded thereon, the computer program for performing one of the methods described herein. The data carrier, the digital storage medium or the recorded medium are typically tangible and / or non- transitory.

[0076] A further embodiment of the inventive method is, therefore, a data stream or a sequence of signals representing the computer program for performing one of the methods described herein. The data stream or the sequence of signals can for example be configured to be transferred via a data communication connection, for example via the Internet.

[0077] A further embodiment comprises a processing means, for example a computer, or a programmable logic device, configured to or adapted for performing one of the methods described herein.

[0078] A further embodiment comprises a computer having installed thereon the computer program for performing one of the methods described herein.

[0079] A further embodiment according to the invention comprises an apparatus or system configured to transfer (for example, electronically or optically) a computer program for performing one of the methods described herein to a receiver. The receiver may, for example, be a computer, a mobile device, a memory device or the like. The apparatus or system may, for example, include a file server for transferring the computer program to the receiver.

[0080] In some embodiments, a programmable logic device (for example a field programmable gate array) can be used to perform some or all functions of the methods described herein. In some embodiments, a field programmable gate array can cooperate with a microprocessor in order to perform one of the methods described herein. Generally, the methods are preferably performed by any hardware apparatus.

[0081] List of reference symbols

[0082] 100 surgical microscope system

[0083] 110 apparatus for a surgical microscope system

[0084] 112 interface

[0085] 114 processing module

[0086] 120 one or more sensors

[0087] 130 output module

[0088] 130a gyroscope

[0089] 130b accelerometer

[0090] 130c weight sensor

[0091] 140c torque sensor

[0092] 140 illumination

[0093] 150 display

[0094] 160 arm

[0095] 165 brake

[0096] 170 surgical microscope

[0097] 210 obtaining sensor information

[0098] 220 processing sensor information

[0099] 230 determining information about the balance of the surgical microscope system

[0100] 240 providing a warning

[0101] 250 control release of one or more brakes

[0102] 300 surgical microscope system

[0103] 310 base unit

[0104] 320 handle

[0105] 325 brake release button

[0106] 330 display - normal - balanced

[0107] 340 display - warning - slight imbalance

[0108] 350 display - danger - severe imbalance

Claims

1. A surgical microscope system (100), comprising: one or more sensors (120) for providing sensor information about a balance of the surgical microscope system (100); one or more brakes (165) for holding at least one component of the surgical microscope system in a correct position; a surgical microscope (170); and a processing module (114) configured to: process the sensor information, determine information about a balance of the surgical microscope system (100), and based on the information about a balance of the surgical microscope system (100), control a release of the one or more brakes by overriding a control of the one or more brakes based on the information about a balance of the surgical microscope system, or, limit an operation of the brakes if the balance of the surgical microscope system indicates a danger of imbalance.

2. The surgical microscope system (100) according to claim 1, wherein The processing module (114) is configured to determine the information about a balance of the surgical microscope system (100) in response to a release of the one or more brakes of the surgical microscope system (100).

3. The surgical microscope system (100) according to claim 1, wherein The processing module (114) is configured to continuously determine the information about a balance of the surgical microscope system (100).

4. The surgical microscope system (100) of claim 1, wherein The processing module is further configured to provide a warning to a user of the surgical microscope system (100) based on the information about a balance of the surgical microscope system (100), the warning indicating a danger of imbalance in the surgical microscope system (100), the surgical microscope system comprising an output module (130) for providing a warning to a user of the surgical microscope system (100), the warning being provided via the output module (130).

5. The surgical microscope system (100) according to claim 4, wherein the output module (130) comprises a light or a display, wherein the warning is provided as a visual warning, and / or, wherein the output module (130) comprises an audio output module, wherein the warning is provided as an audio warning.

6. The surgical microscope system (100) of claim 4, wherein The output module (130) comprises a haptic feedback actuator, wherein the warning is provided as a haptic feedback.

7. The surgical microscope system (100) according to claim 1, wherein The processing module (114) is configured to dim or deactivate a lighting (140) or a video display (150) of the surgical microscope system (100) based on the information about a balance of the surgical microscope system (100) as a warning to a user of the surgical microscope system (100), the warning indicating a danger of imbalance in the surgical microscope system (100).

8. The surgical microscope system (100) according to claim 1, wherein The processing module (114) is configured to at least partially and / or temporarily prevent a release of the one or more brakes based on the information about a balance of the surgical microscope system (100).

9. The surgical microscope system (100) according to claim 1, wherein The surgical microscope system (100) comprises an automatic balancing system for balancing the surgical microscope system (100), and the processing module is further configured to provide a warning to a user of the surgical microscope system (100) based on the information about the balance of the surgical microscope system (100), the warning indicating a risk of imbalance in the surgical microscope system (100), wherein the warning requires the user to initiate the automatic balancing system.

10. The surgical microscope system (100) of claim 1, wherein, The one or more sensors (120) comprise one or more elements of the group of one or more torque sensors, one or more weight sensors, one or more accelerometers, one or more position sensors, one or more angle sensors, one or more rotation sensors.

11. The surgical microscope system (100) according to claim 1, comprising an arm (160), wherein the one or more brakes (165) are adapted to hold the arm (160) in position, wherein the surgical microscope (170) is attached to the arm.

12. The surgical microscope system (100) according to claim 11, wherein determining the information about the balance of the surgical microscope system (100) comprises determining a speed of movement of the arm (160).

13. An apparatus (110) for a surgical microscope system (100), the surgical microscope system comprising one or more brakes (165) for holding at least one component of the surgical microscope system in position, and a surgical microscope (170), the apparatus (110) comprising: an interface (112) for communicating with one or more components of the surgical microscope system (100); and a processing module (114) configured to: obtain sensor information about the balance of the surgical microscope system (100) from one or more sensors (120) of the surgical microscope system (100), process the sensor information, determine information about the balance of the surgical microscope system (100), and based on the information about the balance of the surgical microscope system (100), control the release of the one or more brakes by overriding the control of the one or more brakes based on the information about the balance of the surgical microscope system, or, limit the operation of the brakes if the balance of the surgical microscope system indicates a risk of imbalance.

14. A method for a surgical microscope system (100), the surgical microscope system comprising one or more brakes (165) for holding at least one component of the surgical microscope system in position, and a surgical microscope (170), the method comprising: obtaining (210) sensor information about the balance of the surgical microscope system (100) from one or more sensors (120) of the surgical microscope system (100); processing (220) the sensor information; determining (230) information about the balance of the surgical microscope system (100); and ​ controlling (250) the release of the one or more brakes by overriding the control of the one or more brakes based on the information about the balance of the surgical microscope system, or limiting the operation of the brakes if the balance of the surgical microscope system indicates a risk of imbalance, based on the information about the balance of the surgical microscope system.

15. Computer program product having a program code for performing the method according to claim 14, when the computer program is executed on a processor.

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