DE102004057002A1 - Medical diagnostic and / or therapy system and method for its operation - Google Patents

Abstract

The invention relates to a medical diagnosis and / or therapy system and a method for its operation, wherein existing protective devices (1-11, 22) have reporting modules (6.1-11.1, 22.1) and control connections (19) to a higher-level central control system (14 ), which immediately stores the activation of a protection device (1-11, 22) in a log file.

Description

The The invention relates to a medical diagnostic and / or therapy system with a variety of electrically powered subsystems, which in each case at least one electrical protection device for at least have a circuit and this at least one circuit of the subsystem and, where appropriate, the circuit of subordinate subsystems can de-energize. Furthermore, the invention relates to a method for electrical protection such a medical diagnostic and / or therapy system.

at Medical diagnostic and / or therapy systems are general known, this in the electrical supply with protective devices to provide. For example, have known CT systems Guards located in a locally separated power distribution cabinet and in the event of a fault, for example in the event of a short circuit, occurrence of an overcurrent or a fault current, the system in a safe, so de-energized, Transfer state. In In such a case, the service technician must first determine which protective device triggered Has. This results in long search times and it is for the service technician not possible, in anticipation of determining which replacement components to the customer are to be taken.

It It is therefore an object of the invention to provide a medical diagnostic and / or To present therapy system, which has an improved service situation.

The The object of the invention is solved by the features of the independent claims, advantageous Further developments are set forth in the subclaims.

Of the Inventor has realized that improving the service situation to achieve in a medical diagnostic and / or therapy system is when the possibility open is to log the activation of a protection device and then this protocol to provide the service technician with fault finding. For example This can be done by an e-mail, an SMS, by an automatic fax or similar Data transfer mechanisms happen.

Accordingly, the inventor proposes before, the known medical diagnosis and / or therapy system, which has a plurality of electrically powered subsystems, the at least one electrical protection device for at least contain a circuit and this at least one circuit Subsystem and, where appropriate, the circuit subordinate Can disconnect subsystems to improve that the protection devices via reporting modules feature and control connections to a superordinate central control system present, the activation of a protective device immediately in saves a log file. Preferably, additionally Control device to an uninterruptible power supply connected.

By This measure is achieved that the activation or the response of a protective device In any case, it is documented in a log file, so that when subsequent service remains recognizable in which order the Protection devices triggered were. This makes it much easier for the service, the Cause for that Fault behavior of the system to find.

Advantageous it is when the protection devices via a data bus with the Control device communicate. In this data bus can For example, it is a standardized CAN bus or CANopen bus act. Such buses are for example in the automotive industry known and can be integrated here advantageous. In this way, the Possibility, to resort to known components of the automotive technology. in principle can a variety of different bus systems and bus topographies be used.

Farther It is advantageous if the log file has a timestamp of activations the protection device contains. By this measure can the exact timing when triggering the protections be reconstructed, which in turn an improved cause determination allows becomes. A further improvement is achieved in that in the Log file additional Sensor information from the monitored System, preferably at the time the protective devices are triggered, be logged. If such information is provided to the service Provided be, it is much easier possible, for example by additional Temperature information or power consumption information, the cause for the Occurrence of a mistake.

A further improvement of the system is achieved by the fact that the central control system not only receives information about the status of the protective devices, but can additionally trigger the protective devices in a targeted manner. In particular, by the application of a bus system, the control of the protection devices is essential relieved. The central control system can now take targeted action when triggering a protection device to prevent damage to the patient or the entire system. This can be done, for example, by any existing radiation devices, such as those present in a computed tomography system or a medical radiation therapy system, being switched off immediately by the central control system.

in the Case of a tomography system, in particular a computed tomography device, or a Radiation therapy system, can power the entire system at least one of the following protection devices in a main line: overvoltage protection device, Differential / fault current detection, mains monitoring, main switch, Isolating transformer with temperature monitoring.

Preferably the overall system has at least one of the following subsystems with own circuits and own protection devices on: at least a cooling system, at least one generator, at least one arithmetic unit with at least an upstream uninterruptible power supply, a Patient couch, a stationary one Part of a gantry and a rotating part of a gantry.

In addition, can It may be advantageous if the main switch is a tripping module which can be triggered by the control system. Corresponding can also the subsystems over one trigger module each feature, which are jointly triggered by service personnel manually can.

A further improvement of the medical diagnostic and / or therapy system can be achieved by making the control system an application to an IP-based data network, in particular the Internet or a Intranet. This makes it special for the service technician easy, information about to preserve the fault behavior of the system, without on-site on the system itself be active to have to. This can be clarified in advance of a repair measure, which Spare part to the customer must be taken to a fast Perform repair to can.

Corresponding In accordance with the underlying concept of the invention, the inventor also proposes a method for electrical protection of a medical diagnostic and / or Therapy system before, wherein when triggering a protective device reported this event to the central control system and from Control system in a non-volatile Memory is deposited. In doing so, the control system should be Save the trigger also store a timestamp to a protection device.

in the Trap of a CT device or radiotherapy device the control system should trigger at least one of the guards the diagnostic and / or therapy system, when triggering the Differential / fault current detection in the main power supply line and / or the main switch and / or the temperature monitor the isolation transformer and / or the uninterruptible power supply the at least one arithmetic unit and / or the differential / fault current detection on Isolating transformer completely subsystems and in a predetermined order, preferably in predetermined Intervals, shut down.

Of Further, the control system of the diagnostic and / or therapy system when triggering a the protections for the subsystems cooling system, Generator, a patient bed, stationary part of the gantry and rotating Part of the gantry exclusively switch off the radiation mode. This ensures that even when switching off the radiation mode, because of an error in the associated Subsystems, nevertheless further evaluation activities, which usually only require the function of the processing units, can be continued. Of Further it is suggested that the control system also in the case of triggering of overvoltage protection or network monitoring the complete Maintains operation.

Prefers the control system is operated so that it in the event of triggering a the protections automatically change the contents of the log file at least partially forwarded to a service facility.

In a particularly convenient variant of the method is also proposed that the control system based on the triggering sequence of protections analyzed the cause of the errors that occurred and the user of the Systems available provides. However, there is also the possibility that the control system the contents of the log file, at least in part, on an IP address access limited for inspection, preferably for a service technician available provides.

additional Features and advantages of the invention will become apparent from the following Description of a preferred embodiment with reference on the drawings, with only the understanding of the Invention necessary features are shown.

The invention will be described below with reference to single 1 , which illustrates a block diagram of a preferred embodiment, explained in more detail. The following reference numbers are used: 1 Overvoltage protection; 1.1 Alarm module for overvoltage protection; 2 Differential / fault current detection for the main power supply line; 2.1 Signaling module for differential / fault current detection; 3 Network monitoring; 3.1 Signaling module for network monitoring; 4 Main switch of the CT system; 4.1 Signaling module for the main switch of the CT system; 4.2 Trigger module for the main switch; 5 Isolation transformer; 5.1 Signaling module for the isolating transformer; 6 Cooling system; 6.1 Reporting module for the cooling system; 6.2 Tripping module for the cooling system; 7 stationary generator; 7.1 Signaling module for the stationary generator; 7.2 Tripping module for the stationary generator; 8th Uninterruptible power supply; 8.1 Signaling module for the uninterruptible power supply; 9 Patient support; 9.1 Reporting module for the patient couch; 9.2 Trigger module for the patient couch; 10 stationary part of the gantry; 10.1 Signaling module for the stationary part of the gantry; 10.2 Trigger module for the gantry; 11 rotating part of the gantry; 11.1 Signaling module for the rotating part of the gantry; 12 Calculating unit; 13 uninterruptible power supply for the control system; 14 Control system; 15 Main power supply line; 16 Power supply line to subsystems without patient contact; 17 Power supply line to subsystems with patient contact; 18 Power supply of the control system; 19 CAN bus; 20 Detector loop for differential / fault current detection; 21 Internet; 22 Differential / fault current detection of the isolating transformer; 22.1 Signaling module for differential / fault current detection at the isolating transformer; 23 Detector loop for differential / fault current detection on the isolating transformer.

In the 1 a block diagram of a CT system according to the invention is shown. The power supply line 15 The CT system initially leads to overvoltage protection 1 which protects the system from the effects of sudden overvoltage, such as may occur when lightning strikes. Subsequently, a detection of differential currents by the differential / fault current detection 2 with the help of detector loops 20 , Here, the incoming and outgoing current flow is measured, which must be zero in the sum and otherwise provides an indication of a fault current. This is followed by a device 3 for monitoring the network, by which the correct connection of the individual phases and the level of the alternating voltage are monitored. Following this is in the power supply line 15 the main switch 4 the CT system, through which the CT system is put into operation.

Circuit technology behind the main switch 4 located, followed by the current branch 16 supplying the subsystems that have no direct patient contact. In the present example, these are the cooling system 6 , the stationary generator 7 and the computing units 12 with the upstream uninterruptible power supply 8th ,

Also the main switch 4 downstream of the isolating transformer follows 5 which provides protection separation between the subsystems that can come into direct contact with the patient. These subsystems patient couch 9 and gantry 10 and 11 be via the power supply line 17 from the isolating transformer 5 supplied from. At the isolating transformer also a detection of differential currents by the differential / fault current detection takes place 22 with the help of a detector loop 23 , Again, the incoming and outgoing current flow is measured, which must be zero in the sum and otherwise provides an indication of the presence of a fault current.

in the Block diagram shown here are representative of the individual Subsystems whose protective devices are self-presented.

According to the invention, the CT system shown here in the block diagram has a control system 14 , which via a CAN bus 19 is connected to a variety of signaling modules x.1, via its own uninterruptible power supply 13 , so that even in the failure of the main power supply, at least for a certain time the operation of the control system 14 can be continued. The CAN bus 19 is looped through in a conventional manner by the individual reporting modules connected. In the case of the triggering of a protection module associated with the reporting module immediately a message to the control system via the CAN bus 14 discontinued. The control system 14 enters this message or a corresponding coded information in a log file, which is stored immediately.

So one of the protections 1 to 11 or 22 triggered, it can subsequently be easily detected via the log file, which protection device and thus which subsystem or which event was responsible for the failure of the system. In addition, a time stamp can also be added to the message, so that subsequently the order and the time interval of the individual trigger events can be recognized.

In the block diagram of the 1 has the central control system 14 additionally via a connection to the Internet 21 so that a maintenance company or service engineer responsible for the plant can easily view the saved log file. Of course, such an inspection by appropriate security measures are protected against access by unauthorized persons. This can be done for example by a password query. Instead of the connection shown here to the Internet, a connection to the intranet within the institute can also be selected, so that if necessary an in-house technician can access the log file via a corresponding IP address, or via an e-mail or a similar data transmission method is informed.

In the specific embodiment shown here have the main switch 4 , the protections for the cooling system 6 , the stationary generator 7 , the patient bed 9 and the gantry 10 and 11 via additional remotely controllable tripping modules x.2 that allow the control system 14 make it possible to implement the triggering of the complete protection devices in parallel. In addition, it is possible for the control system to effect predefined switching states of the system as a function of the reported protective devices triggered via the CAN bus. For example, the CT system shuts down completely when the control system 14 from the reporting modules 2.1 . 4.1 . 5.1 . 8.1 or 22.1 receives information about the triggering. On the other hand, only the radiation mode is set to ensure the safety of the patients when the control system 14 a message about a trip from the trip modules in 6.1 . 7.1 . 9.1 . 10.1 or 11.1 receives. In such a case, the operation of the arithmetic unit can be continued, so that evaluations of existing CT data sets are possible. Receives the control system 14 from the reporting modules 1.1 and 3.1 a message, so only a message is sent to the service technician.

In the context of the invention, it is also, if over the bus system 19 additional information regarding the operating status of the system or the condition of individual components to the control system 14 be transmitted. Furthermore, it is also within the scope of the invention, when the control system 14 has an evaluation logic, which performs an error analysis based on the reported tripping events and possibly additional sensor information and outputs a probable cause of the error or enters it in the log file.

in the It is also within the scope of the invention if only the Transmit message signals be, with the switching signals or a switching voltage for triggering the trigger modules x.2 over separate lines can be made.

Complementary to point out that the individual protection devices, reporting modules and trip modules usually housed in a common control cabinet.

It it is understood that the above features of the invention not only in the specified combination, but also in others Combinations or alone, without the frame to leave the invention.

Claims (22)

Medical diagnostic and / or therapy system with a plurality of electrically powered subsystems, each having at least one electrical protection device for at least one circuit and can switch these at least one circuit of the subsystem de-energized, characterized in that the protective devices ( 1 - 11 . 22 ) via reporting modules ( 6.1 - 11.1 . 22.1 ) and control compounds ( 19 ) to a higher-level central control system ( 14 ), which is the activation of a protective device ( 1 - 11 . 22 ) immediately saved in a log file. Medical diagnostic and / or therapy system according to the preceding claim 1, characterized in that the central control system ( 14 ) to an uninterruptible power supply ( 13 ) connected. Medical diagnosis and / or therapy system according to one of the preceding claims 1 to 2, characterized in that at least one of the protective devices ( 1 - 11 . 22 ) via a data bus ( 19 ) with the control device ( 14 ) connected is. Medical diagnostic and / or therapy system according to the preceding patent claim 3, characterized in that the data bus ( 19 ) is a CAN bus. Medical diagnostic and / or therapy system according to one of the preceding claims 1 to 4, characterized in that the log file contains a timestamp of the activations of the protective devices ( 1 - 11 . 22 ) contains. Medical diagnostic and / or therapy system according to one of the preceding claims 1 to 5, characterized in that the log file sensor data from the system, preferably at the time of activations of the protective devices ( 1 - 11 . 22 ) contains. Medical diagnostic and / or therapy system according to one of the preceding claims 1 to 6, characterized in that min at least one of the protective devices ( 1 - 11 . 22 ) from the central control system ( 14 ) can be controlled by trip modules. Medical diagnostic and / or therapy system according to one of the preceding claims 1 to 7, characterized in that it is a tomography system, in particular a computed tomography device, is. Medical diagnostic and / or therapy system according to one of the preceding claims 1 to 8, characterized in that it is a radiation therapy system is. Medical diagnostic and / or therapy system according to one of the preceding claims 8 to 9, characterized in that the power supply of the entire system in a main strand ( 15 ) has at least one of the following protective devices: overvoltage protection device ( 1 ), Differential / fault current detection ( 2 ), Network monitoring ( 3 ), Main switch ( 4 ), Isolating transformer with temperature monitoring ( 5 ). Medical diagnostic and / or therapy system according to the preceding Patent Claim 10, characterized in that at least the following subsystems have their own circuits and their own protective devices: at least one cooling system ( 6 ), at least one generator ( 7 ), at least one computing unit (xx) with at least one uninterruptible power supply ( 8th ), a patient couch ( 9 ), a stationary part of a gantry ( 10 ) and a rotating part of a gantry ( 11 ). Medical diagnostic and / or therapy system according to one of the preceding claims 1 to 11, characterized in that the main switch ( 4 ) a trigger module ( 4.2 ), which is controlled by the 14 ) can be triggered. Medical diagnostic and / or therapy system according to one of the preceding claims 1 to 12, characterized in that the subsystems each have a trigger module ( 6.2 - 10.2 ), which can be triggered manually by the service for affected subsystems together. Medical diagnosis and / or therapy system according to one of the preceding claims 1 to 13, characterized in that the control system ( 14 ) a connection to an IP-based data network ( 21 ), in particular the Internet or an intranet. Method for the electrical protection of a medical diagnosis and / or therapy system according to one of the preceding claims 1 to 14, characterized in that when a protective device ( 1 - 11 . 22 ) send this event to the central control system ( 14 ) and the control system ( 14 ) is stored in a non-volatile memory. Method according to the preceding claim 15, characterized in that the control system ( 14 ) when storing the triggering of a protective device ( 1 - 11 . 22 ) also saves a timestamp. Method according to one of the preceding claims 15 to 16, characterized in that the control system ( 14 ) the diagnostic and / or therapy system when triggering the differential / fault current detection ( 2 ) in the main power supply line ( 15 ) and / or the main switch ( 4 ) and / or the temperature monitoring of the isolating transformer ( 5 ) or the uninterruptible power supply ( 8th ) of the at least one computing unit ( 12 ) and / or differential / fault current detection ( 22 ) at the isolating transformer ( 5 ) shuts down the subsystems completely and in a predetermined order, preferably at predetermined time intervals. Method according to one of the preceding claims 15 to 17, characterized in that the control system ( 14 ) in the diagnostic and / or therapy system when triggering one of the protection devices for the subsystem cooling system ( 6 ), Generator ( 7 ), a patient couch ( 9 ), stationary part of the gantry ( 10 ) and rotating part of the gantry ( 11 ) only switches off the radiation mode. Method according to one of the preceding claims 15 to 18, characterized in that the control system in the case of the arrival of a message about the triggering of the overvoltage protection ( 1 ) or network monitoring ( 3 ) Maintains full operation. Method according to one of the preceding claims 15 to 19, characterized in that the control system ( 14 ) in the case of triggering one of the protective devices ( 1 - 11 . 22 ) automatically at least partially forwards the contents of the log file to a service facility. Method according to one of the preceding claims 15 to 20, characterized in that the control system ( 14 ) analyzes the cause of the error that has occurred and makes it available to the user of the system on the basis of the triggering sequence of protective devices. Method according to one of the preceding claims 15 to 21, characterized in that the control system ( 14 ) the content of Log file at least partially on an IP address with access restricted for inspection provides.