JP2011015709A - X-ray equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide X-ray equipment allowing an operator to confirm the type of an X-ray filter inserted in X rays based on the state of lighting of a display lamp and to obtain an excellent image under an appropriate X-ray condition by always selecting an optimum X-ray filter.SOLUTION: A control circuit 64 stores output values (A, B, C and D) of a position sensor 74 when a round hole 69a and the center of each X-ray filter 70, 71 or 72 are inserted in X rays. When the operator presses a selector switch 62, the control circuit 64 rotates a motor 67 via a motor driving circuit 66 and stops the motor 67 when the output value of the position sensor 74 reaches one of the values A, B, C and D. The control circuit 64 determines the frequency of 0.3-second switching on and 0.3-second switching off of the display lamp 63 according to the output value. This blinking is repeated every 3 seconds.

Description

  The present invention relates to an X-ray imaging apparatus, and more particularly to a display means for displaying the type of an X-ray filter inserted between an X-ray tube for exposing X-rays and a subject.

  This type of X-ray imaging apparatus includes an X-ray tube that irradiates a subject with X-rays via an X-ray filter, an X-ray diaphragm that is held by the X-ray tube and on which the X-ray filter is disposed. A cassette containing an X-ray tube holder for suspending and holding the X-ray tube so as to be movable in a horizontal direction and a vertical direction, and an X-ray film for imaging X-rays transmitted through the subject, or An X-ray detector composed of a portable FPD or the like, and a standing imaging stand and a supine imaging stand that are selectively used in accordance with a designated imaging technique by holding the X-ray detector detachably; It is comprised with the control console which controls each said component.

  Conventionally, when X-ray imaging is performed in a hospital, the X-ray detector is set on a standing radiography stand (standing position stand) or a supine radiography stand (bed with a top plate) depending on the purpose of radiography. The patient is placed on the imaging table where the instrument is set, and the X-ray tube moves to a position suitable for the imaging method by inputting the imaging method from the control panel of the control console. Insert and start shooting.

  For example, in the case of chest X-ray imaging in general imaging, imaging is performed by inserting an X-ray filter with a thickness of Cu 1.0 mm under X-ray conditions of 140 kV and 100 mA. By inserting the X-ray filter, the X-ray component with a low energy of 20 to 55 keV was attenuated, and the X-ray only with a high-energy component of 55 keV or higher was irradiated to the subject and overlapped with the ribs and the mediastinum. The lesion can be expressed as an image.

  On the other hand, different X-ray filters are sequentially inserted in one imaging, X-rays are emitted under different X-ray conditions according to the inserted X-ray filters, and an appropriate region from a portion having a small X-ray absorption difference to a large portion is appropriate. An X-ray imaging apparatus capable of imaging at a density has been proposed (see Patent Document 1).

Japanese Patent Laid-Open No. 2003-210442

  A good image can be obtained by inserting an appropriate X-ray filter as described above. Conventionally, the type of the inserted X-ray filter is displayed on a display composed of liquid crystal provided in the X-ray diaphragm. However, if the display is broken or there is no display, The type of filter could not be confirmed, the X-ray conditions became inappropriate, and there was a risk of not only insufficient dose, excessive dose, or a good image being obtained, but also causing the subject to be exposed excessively.

  The present invention includes a plurality of X-ray filters and X-ray filter insertion means for inserting one of the plurality of X-ray filters into a path of X-rays radiated from the X-ray tube, and passed through the subject. In an X-ray imaging apparatus for imaging transmitted X-rays by an X-ray imaging means, a selector switch for instructing the X-ray filter insertion means to insert a single X-ray filter, and a switch in the vicinity of the selector switch. And a lighting means for changing the lighting method of the indicator lamp corresponding to the type of the inserted X-ray filter. Moreover, the lighting means blinks the indicator lamp, and the number of blinks within a predetermined time corresponds to the type of the inserted X-ray filter. Alternatively, the lighting means turns on the indicator lamp by changing the color, and the type of the lit color corresponds to the type of the inserted X-ray filter. Therefore, the type of the X-ray filter can be confirmed even when the display unit made of liquid crystal is broken or there is no display unit.

  Even if the display is broken or there is no display, the type of X-ray filter inserted in the X-ray can be confirmed, so the optimal X-ray filter can be selected, and the dose can be determined under appropriate X-ray conditions. There is no shortage or excessive dose, and not only a good image can be obtained but also an X-ray imaging apparatus that does not cause the subject to be exposed excessively can be expected.

It is a figure which shows schematic structure of the X-ray diaphragm by the Example of this invention. It is a figure which shows schematic structure of the X-ray imaging apparatus by the Example of this invention.

  An X-ray imaging apparatus according to an embodiment of the present invention is for general imaging, and an X-ray tube that exposes an X-ray to a subject via an X-ray filter, and the X-ray filter held by the X-ray tube An X-ray stop provided, an X-ray tube holding unit for suspending and holding the X-ray tube, an X-ray detector configured by an FPD for imaging X-rays transmitted through the subject, and the X-ray detection It comprises a detector holding part (standing position stand) that holds the detector.

  An X-ray imaging apparatus according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a diagram showing a schematic configuration of an X-ray diaphragm 6 according to an embodiment of the present invention. FIG. 2 is a diagram showing a schematic configuration of an X-ray imaging apparatus according to an embodiment of the present invention.

  As shown in FIG. 2, the X-ray imaging apparatus according to the embodiment of the present invention emits X-rays to a subject M through an X-ray diaphragm 6 having a display 61, a changeover switch 62, and an indicator lamp 63. An X-ray tube holding unit 2 that holds the X-ray tube 1, an upright stand 3 that holds a bucky unit 4 on which an X-ray detector 5 composed of an FPD is disposed, and an X-ray tube An X-ray generator 15 that controls exposure and a control console 8 that controls each of the above-described components and performs image processing and the like.

  The X-ray generator 15 includes an X-ray controller 16 and a high voltage device 17. The control console 8 includes an image processing unit 9, a condition storage unit 12 for storing X-ray conditions, an operation panel 10 for inputting X-ray conditions and the like, and a control unit 11 for controlling each component.

  The X-ray controller 16 controls the X-ray tube 1 through the high-voltage device 17 based on the X-ray conditions stored in the condition storage unit 12 in accordance with instructions from the control unit 11. The X-ray transmitted through the subject M enters the X-ray detector 5, is converted into an electric signal, is input to the image processing unit 9, is imaged, is displayed on a display unit (not shown), and X-ray imaging is performed.

  An X-ray diaphragm 6 according to an embodiment of the present invention will be described with reference to FIG. As shown in FIG. 1, the X-ray diaphragm 6 has a filter holding plate 69 in which gear teeth are formed on the outer periphery, a round hole 69a and X-ray filters 70, 71, 72 are arranged concentrically and supported rotatably at the center. A motor 67 that rotates the filter holding plate 69 via a gear 68, a position sensor 74 that includes a potentiometer that rotates via a gear 73 as the filter holding plate 69 rotates, and a display that includes, for example, liquid crystal For example, an indicator lamp 63 composed of LEDs, a control circuit 64, a lighting circuit 65, and a motor drive circuit 66.

  The control circuit 64 stores the output value (A, B, C, D) of the position sensor 74 when the center of each of the round hole 69a and the X-ray filters 70, 71, 72 is inserted into the X-ray. When the surgeon presses the changeover switch 62, the control circuit 64 rotates the motor 67 via the motor drive circuit 66, and when the output value of the position sensor 74 becomes one of the values A, B, C, D, the motor 67 is turned on. Stop. When the output value is A and the motor 67 is stopped, the X-ray passes through the round hole 69a. Therefore, the display 61 displays that the X-ray filter is not inserted in the X-ray, and the indicator lamp 63 not light.

  When the output value is B and the motor 67 is stopped, the display 61 displays that the X-ray filter 70 is inserted in the X-ray, and the control circuit 64 passes through the lighting circuit 65 for 0.3 seconds, for example. The indicator lamp 63 is turned on, and this is repeated at a cycle of 3 seconds. When the output value is C and the motor 67 is stopped, the display 61 displays that the X-ray filter 71 is inserted in the X-ray, and the control circuit 64 displays, for example, the indicator lamp 63 via the lighting circuit 65. The flashing of 0.3 second lighting and 0.3 second lighting off is performed twice, and this is repeated at a cycle of 3 seconds. When the output value is D and the motor 67 is stopped, the display 61 displays that the X-ray filter 72 is inserted in the X-ray, and the control circuit 64 displays, for example, the indicator lamp 63 via the lighting circuit 65. The flashing of 0.3 second lighting and 0.3 second lighting off is performed three times, and this is repeated at a cycle of 3 seconds.

  Since the present invention has the above-described configuration, even if the display 61 composed of liquid crystal breaks down, the surgeon can determine which of the X-ray filters 70, 71, 72 depending on the number of times the indicator lamp 63 blinks in 3 seconds. Can be confirmed in the X-ray. Therefore, an optimal X-ray filter can be selected at all times, and an appropriate X-ray condition can be obtained with no dose deficiency or excessive dose, a good image can be obtained, and the subject M can be prevented from being exposed excessively. Can be expected.

  In the embodiment shown in the figure, the control circuit 64 causes the indicator lamp 63 to blink for 0.3 seconds and extinguish for 0.3 seconds via the lighting circuit 65, and the number of blinks for 3 seconds (1 to 3 times) is X. The display corresponds to the type of X-ray filter inserted in the line, but instead of the indicator lamp 63, a display composed of three color LEDs having three LEDs, for example, red, green and blue, in one package The control circuit 64 turns on the indicator lamp by changing the color through the lighting circuit 65, and changes the lighting color (red, green, blue) to the type of X-ray filter inserted in the X-ray. The present invention is applicable even if it is made to correspond.

  In the embodiment shown in the figure, the changeover switch 62 is constituted by a push button switch, but the present invention can be applied even if it is constituted by a rotary switch instead. FIG. 2 shows an X-ray imaging apparatus in which the subject M is placed on the standing stand 3, but general imaging in which the subject M is placed on the standing position imaging stand (bed with a top plate). The present invention can also be applied to an X-ray imaging apparatus. The present invention can also be applied to an X-ray imaging apparatus in which an X-ray tube and an X-ray detector are supported opposite to each other on both ends of the C arm across the subject M. As described above, the present invention is not limited to the illustrated examples and includes various modifications.

  The present invention relates to an X-ray imaging apparatus, and in particular, may be used as a display means for displaying the type of an X-ray filter inserted between an X-ray tube that exposes X-rays and a subject.

DESCRIPTION OF SYMBOLS 1 X-ray tube 2 X-ray tube holding part 3 Standing stand 4 Bucky part 5 X-ray detector 6 X-ray diaphragm 8 Control console 9 Image processing part 10 Control panel 11 Control part 12 Condition preservation | save part 15 X-ray generator 16 X Line controller 17 High voltage device 61 Indicator 62 Changeover switch 63 Indicator lamp 64 Control circuit 65 Lighting circuit 66 Motor drive circuit 67 Motor 68 Gear 69 Filter holding plate 69a Round hole 70 X-ray filter 71 X-ray filter 72 X-ray filter 73 Gear 74 Position sensor M Subject

Claims (3)

  A plurality of X-ray filters, and X-ray filter insertion means for inserting one of the plurality of X-ray filters into a path of X-rays emitted from the X-ray tube, and transmitting X-rays that have passed through the subject. In the X-ray imaging apparatus for imaging by the X-ray imaging means, a change-over switch for instructing the X-ray filter insertion means to insert one X-ray filter, and an indicator lamp disposed in the vicinity of the change-over switch, An X-ray imaging apparatus comprising: lighting means for changing a lighting method of the indicator lamp corresponding to the type of the inserted X-ray filter.   2. The X-ray imaging apparatus according to claim 1, wherein the lighting means blinks the indicator lamp, and the number of blinks within a predetermined time corresponds to the type of the inserted X-ray filter.   2. The X-ray imaging apparatus according to claim 1, wherein the lighting means turns on the indicator lamp by changing a color, and the type of the lit color corresponds to the type of the inserted X-ray filter. .

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