JP2014200436A - X-ray image diagnostic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an X-ray image diagnostic apparatus capable of smoothly performing inspection even when the power supply capacity of external power is relatively small.SOLUTION: An X-ray image diagnostic apparatus comprises: an exposure battery which stores power supplied to an X-ray source; a first switching circuit which switches ON/OFF of power supply from an external power source with respect to the exposure battery; a load circuit such as a display device; a backup capacitor which receives power from the external power source and stores power supplied to the load circuit; a second switching circuit which switches ON/OFF of power supply from the external power source with respect to the load circuit and the backup capacitor; a detection part which detects the voltage of the backup capacitor; and a feedback control part which performs switching control of ON/OFF of the first switching circuit and the second switching circuit on the basis of the detection result by the detection part. When the residual amount of the backup capacitor is sufficient, the feedback control part performs charging of the exposure battery by switching the first switching circuit ON, and drives the load circuit with a battery by switching the second switching circuit OFF.

Description

  The present invention relates to an X-ray diagnostic imaging apparatus, and more particularly to an improved technique for supplying power to an X-ray source.

  Patent Document 1 discloses a C-arm system having a C-arm carriage that supports an X-ray source and an X-ray detector by a C-type arm and a monitor carriage equipped with a monitor that displays an X-ray image. Yes.

JP 2010-63586 A

  In the C-arm system, an exposure battery is mounted in the C-arm carriage, and the X-ray source is fed from this battery to output X-rays. Therefore, it is necessary to wait for X-ray irradiation. On the other hand, a 100V commercial power supply system is often adopted for the C-arm system. Therefore, even if it is desired to increase the charging speed of the exposure battery, it is necessary to operate the system within the rated power of the commercial power supply, and there may be a delay in the inspection (downtime) due to waiting for the charging of the exposure battery. was there.

  Accordingly, an object of the present invention is to provide an X-ray diagnostic imaging apparatus that can perform inspection more smoothly even under the restriction of the power supply capacity of external power.

  The X-ray diagnostic imaging apparatus according to the present invention includes: the X-ray source; a first power storage unit that receives power from an external power supply and stores power applied to the X-ray source; A first switching circuit that switches ON / OFF of power feeding from a power source, a load circuit different from the X-ray source, a second power storage unit that stores power to be received from the external power source and fed to the load circuit, A load circuit and a second switching circuit that switches ON / OFF of power feeding from the external power supply to the second power storage unit; a detection unit that detects a remaining amount of power stored in the second power storage unit; A feedback control unit that performs ON / OFF switching control of the first switching circuit and the second switching circuit based on a detection result by the detection unit, and the feedback control unit includes the second switching circuit. When the remaining amount of power stored in the power unit is equal to or greater than a predetermined threshold, the first switching circuit is switched on to charge the first power storage unit, and the second switching circuit is switched off. The load circuit is driven by power feeding from the second power storage unit.

  According to the present invention, it is possible to provide an X-ray diagnostic imaging apparatus that can perform inspection more smoothly even under the restrictions defined by the power supply capacity of external power.

Explanatory drawing which shows schematic structure of the C arm system which is one Embodiment of this invention Functional block diagram showing the internal configuration of the C-arm system according to the first embodiment The flowchart which shows the flow of the process which concerns on 1st embodiment. Explanatory drawing which shows switching operation | movement of the 1st switching circuit and 2nd switching circuit in 1st embodiment. Functional block diagram showing the internal configuration of the C-arm system according to the second embodiment The flowchart which shows the flow of the process which concerns on 2nd embodiment. Explanatory drawing which shows the switching operation and charge mode of a 1st switching circuit and a 2nd switching circuit in 2nd embodiment. Flowchart showing the flow of processing according to the third embodiment

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Throughout the drawings, the same components are denoted by the same reference numerals, and redundant description is omitted. Hereinafter, as an X-ray image diagnostic apparatus, a C-arm system having a C-arm carriage that supports an X-ray source and an X-ray detector by C-type arms and a monitor carriage equipped with a monitor that displays an X-ray image. In the present invention, the X-ray image diagnosis includes a first power storage unit that stores power to be supplied to the X-ray source, and a load circuit that performs processing different from the charging of the first power storage unit. Any device can be applied regardless of the type.

  First, a schematic configuration of a C-arm system to which the present invention is applied will be described with reference to FIG. FIG. 1 is an explanatory diagram showing a schematic configuration of a C-arm system according to the present embodiment.

  A C-arm system 100 shown in FIG. 1 is a device that is transported from a storage location to an operating room during use, and performs X-ray fluoroscopic imaging of an affected part of a subject 3 during surgery on an operating table 2. The C-arm system 100 includes a monitor carriage 11 equipped with a monitor 12 for displaying an X-ray image, and a C-arm carriage 31 equipped with an X-ray source 34. The monitor carriage 11 and the C-arm carriage 31 include a cable. 20 is electrically connected.

  The monitor carriage 11 includes a monitor 12 composed of a display with a touch panel, a monitor control section 13 that controls each component in the monitor carriage 11, and a power supply section 14 connected to an external power supply 50. The external power source 50 may be a commercial AC power source. Further, as will be described in detail later, the monitor carriage 11 is equipped with a battery for driving a load circuit such as the monitor 12 or the monitor control unit 13.

  The C-arm carriage 31 includes a moving wheel, for example, a pedestal provided with one front wheel and two rear wheels, a main body 31a fixed thereon, and an imaging unit 31b. The main body 31a is a housing that houses the operation unit 37, the control unit 38, the power supply unit 39, the image processing unit 40, and the like, and is provided with a moving handle 41. The imaging unit 31b mainly includes a C arm 33, an X-ray source 34 fixed to one end of the C arm 33, and an X-ray flat panel detector fixed to the other end of the C arm 33 via an image receiving unit support unit 35. (Flat panel detector, hereinafter referred to as FPD) 36 and supported by the C arm support portion 32 on the upper portion of the housing of the main body portion 31a.

  Although not shown in detail in the C arm support portion 32, a turning mechanism that slides the C arm 33 in the arc direction of the C arm (in the direction of arrow A), and the C arm 33 linearly in the horizontal direction. It includes a back-and-forth mechanism that moves (in the direction of arrow B), an elevating mechanism that moves the C-arm 33 up and down in the vertical direction (in the direction of arrow C), and a rotating mechanism that rotates the C-arm 33 (in the direction of arrow D). .

  The C arm 33 supports the X-ray source 34 and the FPD 36 so that they face each other, and variably sets the X-ray irradiation direction with respect to the subject 2 by the four moving mechanisms of the C arm support unit 32. is there.

  The X-ray source 34 is a so-called mono-tank type X-ray generator that irradiates the subject 3 with X-rays. An X-ray tube and a high voltage generator (high voltage transformer, high voltage rectifier) are installed in the X-ray shielding container. Contained and stored. X-rays are generated when a high-frequency voltage (AC voltage) output from the power supply unit 39 is boosted by a high-voltage transformer, converted to a DC high voltage via a high-voltage rectifier, and applied to an X-ray tube.

  The FPD 36 includes a large number of X-ray detection elements arranged on a two-dimensional plane, including a phosphor (scintillator) that converts X-rays into light and photoelectric conversion elements, for example, semiconductor photoelectric conversion elements such as phototransistors and photodiodes. This is an X-ray detector. The FPD 36 is attached to one end of the C arm 33 through the image receiving portion support portion 35. In the FPD 36, X-ray detection elements are arranged in a two-dimensional matrix of rows × columns. Then, when the subject 3 is irradiated with X-rays from the X-ray source 34, the FPD 36 detects the X-ray transmitted through the subject 3 by converting it into a current with the X-ray detection element, and the digital X-ray image data is detected. It is configured to output to the image processing unit 40.

  The operation unit 37 includes an input device for fluoroscopy and imaging parameters, an operation selector, an operation device or switch for fluoroscopy and imaging, an image quality adjuster, and the like. As an input device for setting parameters for fluoroscopy and imaging, a setting device for tube voltage (kV), tube current (mA) and imaging time (ms) or tube current imaging time product (mAs) is provided. In addition, as a fluoroscopic and radiographing operation unit, a foot pedal that performs X-ray irradiation during fluoroscopy and a hand switch that performs X-ray irradiation during radiography are provided. Further, a vertical movement switch for moving the C-arm 33 by motor drive is included.

  The power supply unit 39 incorporates a battery. The power supplied from the battery is converted to a high frequency voltage by an inverter circuit (not shown), and the power is supplied to the X-ray source 34.

  The image processing unit 40 performs various image processing or settings on the digital X-ray image data input from the FPD 36. For example, image quality adjustment such as a variable setting function of a gamma curve, a noise reduction function, an edge enhancement, and an enlargement process In addition to the functions, it has a last image hold function. Of these various functions, as is well known, the last image hold function is a function of storing and reproducing the final image in a memory and displaying it on a monitor as a still image when fluoroscopy is turned off.

  The moving handle 41 is composed of a pair of moving operation handles provided at the upper part of the housing of the main body 31a. When the force applied to one of the handles is larger than the force applied to the other handle, the steering function of the rear wheels Thus, the traveling direction of the C-arm carriage 31 is changed.

  The display 12 with a touch panel is transported to the operating room together with the X-ray device by the monitor carriage 11, displays an image output from the image processing unit 40, and provides it to the surgeon. And the display 12 with a touch panel can input the display direction of an image by touching the arbitrary positions on a screen in this embodiment.

  The C-arm system 100 according to the present embodiment charges the power supply unit 39 of the imaging unit 31b using the external power supply 50 to which the monitor carriage 11 is connected when the imaging unit 31b is in a standby state, and waits for charging. It is characterized by avoiding stagnation of inspection due to.

<First embodiment>
In the first embodiment, when an operation requiring a relatively large amount of power is performed on the C-arm carriage 31 side, the battery in the monitor carriage is driven by the battery in the monitor carriage and is supplied to the monitor carriage 11. By distributing the electric power to the C-arm carriage 31, the electric power usable for the C-arm carriage 31 is increased. Hereinafter, the first embodiment will be described with reference to FIGS. FIG. 2 is a functional block diagram showing the internal configuration of the C-arm system according to the first embodiment. FIG. 3 is a flowchart showing the flow of processing according to the first embodiment. FIG. 4 is an explanatory diagram showing a switching operation of the first switching circuit and the second switching circuit in the first embodiment.

  First, the internal configuration of the C-arm system 100 according to the present embodiment will be described based on FIG. In FIG. 2, a solid line indicates a power line, and a dotted line indicates a signal line.

  The power supply unit 39 (FIG. 1) of the C-arm carriage 31 converts the voltage from the external power source via the connection terminal 391 to the monitor carriage 11 and the monitor carriage 11 into a voltage suitable for the C-arm carriage 31. One voltage conversion circuit 392, a charging circuit 393 connected to the first voltage conversion circuit 392, and a first switching circuit that is connected to the charging circuit 393 and switches ON / OFF of energization (referred to as “SW1” in FIG. 2) 394 and an exposure battery 395 that is connected to the first switching circuit 394, stores the electric power received through the charging circuit 393 and the first switching circuit 394, and supplies the electric power to the X-ray source 34. The X-ray source 34 (FIG. 1) includes a high voltage generator 342 and an X-ray tube 341.

A power load circuit (first load circuit) 400 other than the X-ray source 34 mounted on the C-arm carriage 31 is connected to the first voltage conversion circuit 392. The first load circuit 400 includes, for example, an image processing unit 40 mounted on the C-arm carriage 31, a light-receiving unit of the FPD 36, an arm moving device (not shown) that moves the C-arm 33 up and down, and back and forth. Is included.
The first switching circuit 394 is controlled by a signal from a control unit (feedback control unit) 13, which will be described later, and is switched ON / OFF. When the first switching circuit 394 is ON, the exposure battery 395 is in a charged state, and when it is OFF, it is in a non-charged state.
The exposure battery 395 supplies predetermined power to the high voltage generator 342 of the X-ray source 34 when in an uncharged state, and drives the X-ray source 34 by a battery. In the present embodiment, the X-ray source 34 does not operate when the exposure battery 395 is charged. That is, the exposure battery 395 is charged only when the X-ray source 34 is not operating.

  The control unit 38 of the C-arm carriage 31 controls the high voltage generator 342 in accordance with the X-ray irradiation conditions input from the operation unit 37 and performs control for irradiating X-rays that meet the X-ray irradiation conditions. The high voltage circuit control unit 381 is provided.

  The power supply unit 14 (FIG. 1) of the monitor carriage 11 includes a connection terminal 141 to the external power supply 50, a second voltage conversion circuit 142 that converts the external power supply 50 into electric power suitable for the monitor carriage 11, and a second voltage conversion thereof. A second switching circuit (described as “SW2” in FIG. 2) 143 connected to the circuit 142 and switching energization ON / OFF, and a power storage unit (144 to 146) connected to the second switching circuit 143 are provided. . The power storage unit is connected to a power load circuit (second load circuit) 150 on the monitor cart side. The second load circuit 150 is an element that operates by receiving power supply such as a monitor (touch panel display) 12 and a monitor control unit 13 mounted on the monitor carriage 11. Further, the monitor carriage 11 is provided with a connection terminal 147 to the C-arm carriage 31, and the second voltage conversion circuit 142 is connected to the first voltage conversion circuit of the C-arm carriage 31 via the connection terminal 147 and the cable 20. 392.

  The second switching circuit 143 is controlled to be turned on / off by a signal from a control system (feedback control unit) described later. When the second switching circuit 143 is ON, charging from the second voltage conversion circuit 142 to the power storage unit and power feeding to the second load circuit 150 are performed. When the second switching circuit 143 is OFF, power from the second voltage conversion circuit 142 is supplied to the C-arm carriage 31 side. In the present embodiment, the second switching circuit 143 is turned off only when the exposure battery 395 of the C-arm carriage 31 is charged.

In the illustrated embodiment, the power storage unit includes a rectifier 144 inserted between the second switching circuit 143 and the second load circuit 150, a backup capacitor 145 connected to the second load circuit 150, and a backup capacitor 145. A voltage detection circuit 146 connected in parallel. Note that the power storage unit may be configured using a battery and a charging circuit instead of the backup capacitor.
The rectifier 144 prevents a current from flowing backward from the backup capacitor 145 to the second voltage conversion circuit 142, and a rectifier such as a semiconductor diode is used. The backup capacitor 145 drives the second load circuit 150 when power supply from the external power supply is stopped. The voltage detection circuit 146 detects the remaining amount of the backup capacitor 145 and sends the result to the control unit 13.

  The C-arm system includes a feedback control unit 131 that controls the first switching circuit 394 and the second switching circuit 143 as a control system. The feedback control unit 131 is connected to the operation unit 37 of the C-arm carriage 31 and determines the standby mode and the shooting mode of the C-arm system 100 using the screen transition of the operation unit 37 as a trigger. The first switching circuit 394 and the second switching circuit 143 are switched on / off based on the detection result by the voltage detection circuit 146. In the embodiment illustrated in FIG. 2, the control unit 13 of the monitor cart 11 includes the feedback control unit 131, but the control unit 38 of the C-arm cart 31 may include the feedback control unit 131.

  Next, the process flow of the operation of the C-arm system according to the first embodiment will be described along the order of steps in FIG.

(Step S1)
When the connection terminal 141 is connected to the external power supply (commercial power supply) 50, the power supply section of the monitor carriage 11 and the power supply section of the C-arm carriage 31 are energized. The C-arm carriage 31 receives power from the external power supply 50 via the connection terminal 147 of the monitor carriage 11, the cable 20, and the connection terminal 391 of the C-arm carriage 31. In this state, the operator operates a main power switch provided in the operation unit 37 to activate the C-arm system (S0). The C-arm system 100 is in the initial state of the standby mode immediately after startup (S1). In the initial state, both the first switching circuit 394 and the second switching circuit 143 are turned on (see FIG. 4).

(Step S2)
The process branches depending on whether or not the C-arm system 100 shifts to the photographing mode (S2). If the shooting mode is not shifted to, the process proceeds to step S3 in the standby mode, and processing for charging the backup capacitor 145 and the exposure battery (S3, S4, S7) is performed. When shifting to the photographing mode, the process proceeds to step S8.

(Step S3)
The feedback control unit 131 refers to the detection result of the voltage detection circuit 146 and determines whether or not the remaining amount of the backup capacitor 145 of the monitor carriage 11 is normal, in other words, whether or not the voltage is equal to or greater than a predetermined threshold value. Judgment is made (S3). If the voltage of the backup capacitor 145 is greater than or equal to the threshold, the process proceeds to step S4, and if less than the threshold, the process proceeds to step S7.

(Step S4)
The exposure battery is charged (S4). For this reason, the feedback control unit 131 switches the first switching circuit 394 to ON and the second switching circuit 143 to OFF (see FIG. 4). As a result, the second load circuit (monitor or monitor control circuit) 150 of the monitor carriage 11 becomes operable by power supply from the backup capacitor 145. In addition, charging of the exposure battery 395 starts. Charging of the exposure battery 395 is continued until an instruction to end the system (S5) or an instruction to start imaging (S2) is received via the operation unit 37. In this state, the first load circuit (arm drive mechanism, etc.) 400 of the C-arm carriage 31 is operable by power supply from the first voltage conversion circuit 392, and operations other than X-ray irradiation, such as arm movement, are performed. It is possible.

(Steps S5 and S6)
The process branches depending on whether the C-arm system 100 is terminated (S5). In the case of “Yes”, the main power switch is turned off and the system is terminated (S6). If “No”, the process returns to Step S2.

(Step S7)
This is a case where the voltage of the backup capacitor is less than the threshold value (S3), and the backup capacitor 145 is charged (S7). Therefore, the feedback control unit 131 switches the second switching circuit 143 to ON and the first switching circuit 394 to OFF (see FIG. 4). As a result, an inrush current flows into the backup capacitor 145 and the backup capacitor 145 is charged.

  Even when the backup capacitor 145 is charged, the second load circuit 150 can operate with power supplied from the external power supply 50. Specifically, since the second load circuit 150 receives power from a power supply located at a closer position, the second load circuit 150 is driven by power supplied from the backup capacitor 145 even when the second switching circuit 143 is turned on. The electric power supplied to the second load circuit 150 is instantaneously charged. Such a state in which the power consumption by the second load circuit 150 is instantaneously replenished to the backup capacitor 145 can be regarded as a power feeding drive from the external power supply 50.

  Thus, while the backup capacitor 145 is being charged, charging to the exposure battery 395 is stopped. That is, when the voltage of the backup capacitor 145 is less than the threshold value, the backup capacitor 145 is preferentially charged. Then, it returns to step S1.

  In the above description, the first switching circuit 394 is turned off when charging the backup capacitor 145 in step S7. However, the power consumption required for charging the backup capacitor 145 is relatively small or the exposure battery 395 is fully charged. When the amount of charging is performed, the first switching circuit 394 may not be turned off.

(Step S8)
The “shooting mode” is a mode in which at least one of “shooting” for acquiring a still image and “perspective” for acquiring a moving image is executed. The shift to the shooting mode is determined by the feedback control unit 131 triggered by the operator changing the display screen of the operation unit 37 to the screen for inputting shooting conditions. When shifting to the imaging mode, the feedback control unit 131 switches the second switching circuit 143 ON and the first switching circuit 394 OFF, and prepares for preparation (discharge) for X-ray irradiation (S8). If the exposure battery 395 has been charged in the immediately preceding step (S4), charging to the exposure battery 395 is stopped to make it dischargeable. As a result, power supply from the exposure battery 395 to the high voltage generator 342 starts. The first load circuit 400 receives power from the first voltage conversion circuit 392 and is operable.

  On the other hand, on the monitor cart side, since the second switching circuit 143 is turned on, the second load circuit 150 is operated by power supply from the external power supply 50, and an inrush current also flows into the backup capacitor 145. 145 is charged.

(Step S9)
The operator operates a foot pedal and an exposure switch (not shown) mounted on the C-arm carriage 31 to irradiate X-rays and start and end fluoroscopy and imaging (S9).

(Step S10)
After the photographing mode is finished, the process branches depending on whether or not the remaining amount of the exposure battery 395 is sufficient for the next fluoroscopy or photographing, that is, whether charging is necessary. If “Yes” (requires charging), the process proceeds to step S3 described above, and step S4 or step S7 is executed to charge the exposure battery 395 whose remaining amount has been reduced by imaging (X-ray fluoroscopy or imaging). . If “No” (no charging required), the system returns to the system stop (S6) or standby mode (S2) through step S5. In other words, the backup capacitor 145 and the exposure battery 395 are always charged in the standby mode before the start of shooting and after the end of shooting, and are necessary for the operation of each load circuit at the time of shifting to the shooting mode in step S2. Electric power can be supplied.

  Whether or not the remaining amount of the exposure battery 395 is sufficient may be determined by providing a voltage detection circuit in the exposure battery 395 and judging from the output thereof, or calculating based on the power consumption of the X-ray source. Then, it may be determined from the result.

  According to the present embodiment, a backup capacitor is provided in the monitor cart, and power from an external power source supplied to the monitor cart is distributed to the C-arm cart. While driving, the exposure battery can be charged. As a result, the system downtime can be shortened such that the inspection is interrupted in order to wait for the exposure battery to be charged, and an improvement in inspection throughput can be expected.

  The order of the above steps is merely an example, and various modifications can be made without departing from the spirit of the present invention. For example, since the standby mode is normally performed immediately after the C-arm system is started (S0), the loop of steps S3, S4, S5, and S7 is always performed before step S2 in FIG. The determination process (S2) may be performed.

  In addition, after it is determined in step S5 that the system has been terminated, the system stops after the backup capacitor 145 and the exposure battery 395 are charged enough to enter the shooting mode in preparation for the next use. (S6) You may comprise.

  Further, when the mode is shifted to the shooting mode immediately after the C-arm system is started (S0), the remaining capacity of the backup capacitor 145 and the exposure battery 395 is checked before step S8, and the power required for fluoroscopy / photographing is performed. It may be configured to execute step S8 after securing.

  In the present embodiment, the feedback control unit 131 performs ON / OFF control of the first switching circuit 394 according to the voltage of the backup capacitor. In conjunction with X-ray exposure (driving of the high voltage generator 342), the first switching circuit 394 is turned on while the X-ray exposure is not performed even in the imaging mode, and the exposure from the charging circuit 393 is performed. It is also possible to configure the battery 395 to be charged.

<Second embodiment>
In the second embodiment, a normal mode in which the charging mode of the exposure battery is charged at a standard speed and a quick charge mode in which the charging speed is higher than the standard speed depending on whether the C-arm carriage is operated other than fluoroscopic / photographing. It is an embodiment to switch to. In the present embodiment, as an example of operations other than the fluoroscopic / photographing of the C-arm carriage, a configuration in which the C-arm is vertically driven (operation in the direction of arrow C in FIG. 1) will be described as an example. However, the operation to be determined for the charging mode switching is not limited to the vertical movement operation of the C-arm, but may be determined according to the amount of power consumption. Hereinafter, the second embodiment will be described with reference to FIGS. FIG. 5 is a functional block diagram showing the internal configuration of the C-arm system according to the second embodiment. FIG. 6 is a flowchart showing a flow of processing according to the second embodiment. FIG. 7 is an explanatory diagram illustrating a switching operation and a charging mode of the first switching circuit and the second switching circuit in the second embodiment.

  As shown in FIG. 5, the C arm system 200 according to the second embodiment includes an arm driving device 420 that drives the C arm by a motor instead of the first load circuit 400 of the first embodiment. Is powered by the first voltage conversion circuit 392 and driven. Further, an arm control unit 421 that controls the operation of the arm driving device 420 is provided. The arm control unit 421 is connected to an arm lift switch (not shown) included in the operation unit 37 and an arm driving device 420.

  In addition, the control unit 38 of the C-arm carriage 31 includes a charge control unit 382 that controls charging speed switching with respect to the charging circuit 393. The charging control unit 382 is connected to an arm lift switch (not shown) included in the operation unit 37 and a charging circuit 393. Then, the charging control unit 382 switches to the normal mode or the quick charging mode according to the presence / absence of an input signal for the arm lifting operation from the arm lifting switch.

  The process flow of the second embodiment will be described with reference to FIG. 6, steps having the same processing contents as those in FIG. 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

Also in this embodiment, after the C-arm system is activated, the standby mode is set until the shooting mode is entered, and the first switching circuit 394 and the second switching circuit 143 are both ON in the standby mode in the initial state. Is the same as in the first embodiment (S0, S2) (see FIG. 7). Steps S8 to S10 after the transition to the shooting mode are the same as in the first embodiment.
In the present embodiment, in the standby mode, the exposure battery 395 is switched to “normal mode” in which charging is performed at a relatively low speed and “rapid charging mode” in which the charging is performed at a relatively high speed, depending on whether the C-arm is lifted or lowered. It is a feature to do. Hereinafter, each step will be described in detail.

(Step S3)
The feedback control unit 131 refers to the detection result of the voltage detection circuit 146 and determines whether or not the remaining amount of the backup capacitor 145 of the monitor carriage 11 is normal, in other words, whether or not the voltage is equal to or greater than a predetermined threshold value. Judgment is made (S3). If the voltage of the backup capacitor 145 is greater than or equal to the threshold, the process proceeds to step S41, and if less than the threshold, the process proceeds to step S7.

(Steps S40 and S41)
The second switching circuit 143 is turned off and the first switching circuit 394 is turned on to prepare for charging the exposure battery (S40). Based on the presence / absence of an input signal from the operation unit 37, the charging control unit 382 determines whether or not the C arm 33 is moved up and down (S41). If there is a lifting / lowering operation of the C-arm 33, the process proceeds to step S42, and if there is no lifting / lowering operation, the process proceeds to step S43.

(Step S42)
When the C arm 33 moves up and down, it is necessary to supply relatively large power from the first voltage conversion circuit 392 to the arm driving device 420 on the C arm carriage 31 side. The charging control unit 382 outputs an instruction signal for setting the charging speed to the standard speed to the charging circuit 393, and charges the exposure battery 395 in the normal mode. Thereafter, if the system is not terminated, the process returns to the standby mode (S1).

(Step S43)
If the C arm 33 does not move up and down, the charging control unit 382 outputs an instruction signal for rapidly setting the charging speed to the charging circuit 393 and charges the exposure battery 395 in the quick charging mode. Thereafter, if the system is not terminated, the process returns to the standby mode (S3).

  According to this embodiment, when charging the exposure battery, the charging speed can be switched depending on whether the arm is lifted or lowered. As a result, when no power is consumed by a load circuit other than the exposure battery, the exposure battery can be charged at high speed, and the system downtime can be further shortened.

  In the embodiment of FIG. 7, in the imaging mode, the case where the first switching circuit 394 is turned off is shown. However, the ON / OFF control of the first switching circuit 394 is controlled by X-ray exposure (high voltage generator). The first switching circuit 394 is turned on while the X-ray exposure is not performed even in the radiographing mode in conjunction with the driving of the H.342, and the exposure battery 395 is charged from the charging circuit 393. It is also possible to do.

<Third embodiment>
In the present embodiment, the second switching circuit 143 is switched ON / OFF depending on whether the shooting mode is “shooting” for acquiring a still image or “perspective” for acquiring a moving image. In general, “perspective” requires a large electric power because it involves the movement of the C-arm and X-ray exposure is continuously performed. The present embodiment is characterized in that the power from the commercial power supply 50 is efficiently distributed by controlling ON / OFF of the second switching circuit according to the processing content of the photographing mode.

  The configuration of the C-arm system of the present embodiment is the same as the configuration shown in the functional block diagram of FIG. 2 or FIG. In the following description, an embodiment will be described in which control is performed in consideration of the raising / lowering operation of the C-arm with reference to FIG. FIG. 8 shows the flow of processing in the imaging mode according to the third embodiment. Since the standby mode is the same as the processing in the standby mode shown in FIG. 3 or FIG.

(Step S80)
The operation branches depending on whether the shooting mode selected via the operation unit 37 is “shooting” or “perspective”. In the case of “perspective”, the process proceeds to step S81, and in the case of “shooting”, the process proceeds to step S82.

(Step S81) (Transparent)
Based on the presence / absence of an input signal from the operation unit 37, the charging control unit 382 determines whether or not the C arm 33 is moved up and down. If there is an up / down operation of the C-arm 33, the process proceeds to step S831, and if there is no up / down operation, the process proceeds to step S832.

(Step S831)
The feedback control unit 131 switches both the second switching circuit 143 and the first switching circuit 394 to OFF, and prepares for preparation (discharge) for X-ray irradiation. If the exposure battery 395 has been charged in the immediately preceding step, charging of the exposure battery 395 is stopped, and the discharge battery 395 is allowed to be discharged. As a result, power supply from the exposure battery 395 to the high voltage generator 342 starts. Further, the arm driving device 420 receives power from the first voltage conversion circuit 392 and is operable.

  On the other hand, on the monitor cart side, the second switching circuit 143 is turned OFF, so that the second load circuit 150 is battery-driven by the backup capacitor 145. Thus, fluoroscopy can be performed while simultaneously performing C-arm driving and X-ray exposure that require high power.

(Step S832)
The feedback control unit 131 turns on the second switching circuit 143 and turns on the first switching circuit 394 to prepare for preparation (discharge) for X-ray irradiation. Since the C-arm 33 is not driven, the inrush current from the second voltage conversion circuit 392 flows to the backup capacitor 145 and is charged to the backup capacitor. The second load circuit 150 on the monitor carriage side is supplied with power from the external power supply 50. Operate.

(Step S82) (Photographing)
As in step S832, the second switching circuit 143 is turned on and the first switching circuit 394 is turned off to prepare for preparation (discharge) for X-ray irradiation. Since “shooting” can be taken in a shorter time than “perspective”, the second switching circuit 143 is turned on regardless of whether the C-arm is driven or not, while charging the backup capacitor 145 on the monitor cart side. The arm carriage side performs C-arm drive as needed with the distributed power.

  In the case of “photographing”, as shown by a dotted line in FIG. 8, it is possible to determine whether the C-arm is in operation (S841), thereby controlling ON / OFF of the second switching circuit 143. In this case, for example, when there is no operation of the C arm, the process proceeds to step S82. If there is a C-arm operation, the process proceeds to step S842.

  In step S842, the feedback control unit 131 determines whether the remaining amount of the backup capacitor 145 detected by the detection circuit 146 is normal and whether the voltage is equal to or higher than a predetermined first threshold, and the backup capacitor 145. If the remaining amount is normal, the second switching circuit 143 is turned off and the first switching circuit 394 is turned off to prepare for X-ray irradiation (discharge) (S843). In this case, the second load circuit 150 on the monitor cart side is battery-driven, and all the electric power from the external power supply 50 is supplied to the C arm side. As a result, the C-arm drive and “photographing” can be performed sequentially.

  When the remaining amount of the backup capacitor 145 is low, the process proceeds to step S82, and the C-arm carriage side performs C-arm driving with the distributed power while charging the backup capacitor 145.

(Steps S91, S92)
Perform fluoroscopy or filming. Subsequent step S10 is the same as steps S9 and S10 shown in FIGS. 3 and 6, and a description thereof will be omitted.
According to the present embodiment, by switching the second switching circuit 143 according to the processing content of the shooting mode, it is possible to efficiently distribute the external power source with limited power and perform a smooth inspection.

  According to the present invention, the power from the external power source supplied to the monitor carriage side is efficiently distributed to the C-arm carriage, thereby avoiding system downtime as much as possible to charge the exposure battery. And smooth inspection can be realized.

DESCRIPTION OF SYMBOLS 100, 200 ... C arm system, 11 ... Monitor cart, 13 ... Monitor control part, 20 ... Cable, 31 ... C arm cart, 33 ... C arm, 34 ... X-ray source, 37 ... operation unit, 38 ... control unit, 39 ... power supply unit, 40 ... image processing unit, 50 ... external power supply, 131 ... feedback control unit, 142 ..Second voltage conversion circuit (monitor truck side power supply unit), 143... Second switching circuit, 145... Backup capacitor (second power storage unit), 146. ... Second load circuit, 341 ... X-ray tube, 381 ... high voltage, 392 ... second voltage conversion circuit (C-arm carriage side power supply unit), 393 ... charge circuit, 394 ..First switching circuit, 395 ... Exposure battery First power storage unit), 400 ... first load circuit, 420 ... arm drive device.

Claims (8)

An X-ray source;
The X-ray source;
A first power storage unit that receives power from an external power source and stores electric power applied to the X-ray source;
A first switching circuit that switches ON / OFF of power feeding from the external power supply to the first power storage unit;
A load circuit different from the X-ray source;
A second power storage unit that receives power from the external power source and stores power to be fed to the load circuit;
A second switching circuit that switches ON / OFF of power feeding from the external power source for the load circuit and the second power storage unit;
A detection unit for detecting a remaining amount of power stored in the second power storage unit;
A feedback control unit that performs ON / OFF switching control of the first switching circuit and the second switching circuit based on a detection result by the detection unit;
The feedback control unit turns on the first switching circuit to charge the first power storage unit when the remaining amount of power stored in the second power storage unit is equal to or greater than a predetermined threshold, An X-ray diagnostic imaging apparatus, wherein the second switching circuit is switched to OFF and the load circuit is driven by power feeding from the second power storage unit. The X-ray diagnostic imaging apparatus according to claim 1,
The feedback control unit switches the first switching circuit to OFF and the second switching circuit to ON when the remaining amount of electric power stored in the second power storage unit is less than the first threshold value. An X-ray diagnostic imaging apparatus characterized by charging two power storage units. The X-ray diagnostic imaging apparatus according to claim 1 or 2,
A display unit for displaying an X-ray image;
The X-ray diagnostic imaging apparatus, wherein the load circuit includes the display unit. An arm carriage equipped with an X-ray source, an X-ray detector, and an arm unit for connecting and supporting the X-ray source and the X-ray detector opposite to each other;
A monitor cart having a connection terminal with an external power supply and equipped with a display device;
A cable for electrically connecting the arm carriage and the monitor carriage;
A control unit that controls driving of the arm carriage and the monitor carriage,
The arm carriage receives a power from an external power source and stores a power to be applied to the X-ray source, and a first power storage unit that switches ON / OFF of power feeding from the external power source to the first power storage unit. A switching circuit,
The monitor carriage includes a load circuit including the display device, a second power storage unit that receives power from the external power supply and supplies power to the load circuit, the load circuit, and the second power storage unit. A second switching circuit that switches ON / OFF of power supply from the external power source, and a detection unit that detects a remaining amount of power stored in the second power storage unit,
X-ray image diagnosis characterized in that the control unit includes a feedback control unit for performing ON / OFF switching control of the first switching circuit and the second switching circuit based on a detection result by the detection unit. apparatus. The X-ray diagnostic imaging apparatus according to claim 4,
The feedback control unit turns on the first switching circuit to charge the first power storage unit when the remaining amount of power stored in the second power storage unit is equal to or greater than a predetermined threshold, An X-ray diagnostic imaging apparatus, wherein the second switching circuit is switched to OFF and the load circuit is driven by power feeding from the second power storage unit. The X-ray image diagnostic apparatus according to claim 4 or 5,
The arm carriage includes an arm driving device that receives power from the external power source and moves the arm portion by motor driving,
The X-ray diagnostic imaging apparatus, wherein the control unit includes a charge control unit that determines whether or not the arm driving device is operating, and controls a speed at which the first power storage unit is charged according to a determination result. . The X-ray image diagnostic apparatus according to any one of claims 4 to 6,
The control unit determines whether shooting for acquiring a still image or fluoroscopy for acquiring a moving image, and switches ON / OFF of the first switching circuit and the second switching circuit according to a determination result. X-ray image diagnostic apparatus. The X-ray diagnostic imaging apparatus according to any one of claims 1 to 7,
The X-ray diagnostic imaging apparatus, wherein the second power storage unit includes a rectifier and a backup capacitor connected between the rectifier and the load circuit.

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