JP4599226B2 - Diagnostic imaging equipment - Google Patents

Description

  The present invention relates to an image diagnostic apparatus, and more particularly to an image diagnostic apparatus that controls a moving mechanism unit based on an operation signal selected from operation signals supplied from a plurality of operation units.

  Medical image diagnosis using an X-ray diagnostic apparatus, an MRI apparatus, or an X-ray CT apparatus has made rapid progress along with the development of computer technology, and is indispensable in today's medical care.

  The above-described diagnostic imaging apparatus normally has a diagnostic apparatus body that collects image information by irradiating examinees such as patients (hereinafter referred to as “subjects”) with energy such as X-rays and RF waves, and the like. The diagnostic apparatus body is constituted by one or a plurality of operation units (operation consoles) or the like for inputting an imaging start instruction signal, a movement control signal of the movement mechanism unit, and the like.

  For example, the X-ray diagnostic apparatus 200 for digestive organs shown in FIG. 6 includes a fluoroscopic table 5X and a top plate 6X on which a subject is placed, and an X-ray generation unit that performs X-ray irradiation and detection on the subject. 1X and X-ray detection unit 2X, and further a diagnostic apparatus main body (see-through) including a moving imaging unit 5X that moves the fluoroscopic imaging table 5X, the top panel 6X, the X-ray generation unit 1X, and the X-ray detection unit 2X to desired positions. A first operation unit (proximity operation console) 203a that supplies a movement control signal for moving the fluoroscopic imaging table 5X and the like to the movement mechanism unit 4X of the diagnostic apparatus main body 201, and a first operation unit 203a. Image data based on X-ray projection data obtained by the X-ray projection data obtained by the X-ray detection unit 2X, the high-voltage generation unit 202 that generates a high voltage necessary for X-ray irradiation, and the operation unit 2 (remote operation console) 203b. Image data to store the generated image data Forming and storing section and (DR device) 204, and a system control unit (control unit) 205 for controlling each unit described above.

  Usually, the diagnostic apparatus main body 201, the first operation unit 203a, and the system control unit 205 are installed in an X-ray shielded examination room, and the second operation unit 203b and the image data generation / storage unit 204 are In the operation room adjacent to the examination room, the high voltage generator 202 is further installed in the machine room. However, the first operation unit 203a may be provided integrally with the diagnostic apparatus main body 201.

  Furthermore, as described above, the X-ray diagnostic apparatus 200 having the plurality of operation units 203 uses the same first operation unit 203a as the movement control signal supplied from the first operation unit 203a and the second operation unit 203b. The diagnostic device main body 201 includes an interlock unit 3X that is selected on the basis of the operation unit selection information supplied from the second operation unit 203b and supplies the selected operation unit to the moving mechanism unit 4X.

  For example, when a doctor or a laboratory technician (hereinafter referred to as an operator) selects the first operation unit 202a and tilts the fluoroscopic imaging table 5X of the diagnostic apparatus main body 201 in a predetermined direction, the first operation is performed. The operation unit selection information generated from the operation unit 203a is supplied to the interlock unit 3X via the system control unit 205, and further, the movement for raising and lowering the fluoroscopic imaging table 5X input in the first operation unit 202a. A control signal is also supplied to the interlock unit 3X.

  On the other hand, the interlock unit 3X performs the second control in the same manner as the movement control signal supplied from the first operation unit 202a based on the above-described operation unit selection information supplied from the first operation unit 203a. The former movement control signal is selected from the other movement control signals supplied from the operation unit 203b. Then, the movement control signal selected in the interlock unit 3X is supplied to the movement mechanism unit 4X of the diagnostic apparatus main body 201, and the fluoroscopic imaging table 5X is raised and lowered.

  Similarly, the movement control signal input by the operation unit 203a or the operation unit 203b selected by the operator is supplied to the movement mechanism unit 4X via the interlock unit 3X, and the top plate 6X, X in the diagnostic apparatus main body 201 is supplied. The line generator 1X and the X-ray detector 2X are moved.

  As described above, the interlock unit 3X of the diagnostic apparatus main body 201 in the X-ray diagnostic apparatus 200 having the plurality of operation units 203 moves from the operation unit 203 based on the operation unit selection information of the selected operation unit 203. A control signal is selected, and the movement mechanism unit 4X is controlled based on the movement control signal selected by the interlock unit 3X.

  However, according to the above-described method, the selection of the movement control signal in the interlock unit 3X is performed by the selection control signal generated by the built-in interlock control unit (not shown) based on the operation unit selection information. Therefore, the interlock control unit has a possibility of generating an erroneous selection control signal under the influence of external noise or the like.

  For example, when the movement control signal supplied from the first operation unit 203a as described above is supplied to the movement mechanism unit 4X via the interlock unit 3X of the diagnostic apparatus main body 201, an error generated by the interlock control unit is generated. Depending on the selection control signal, the movement control unit 4X receives a movement control signal from the second operation unit 202b or a movement control signal from the first operation unit 202a mixed with the movement control signal from the second operation unit 202b. The fluoroscopic bed 5X and the like of the diagnostic apparatus main body 201 supplied has a risk of moving or running away in an unintended direction by the operator.

  The present invention has been made in view of such problems, and a selection control signal for selecting a predetermined movement control signal from movement control signals supplied from a plurality of operation units is caused by noise or the like. Thus, it is an object of the present invention to provide an image diagnostic apparatus capable of preventing a moving mechanism from running away or moving in an unintended direction even when it is generated by mistake.

  In order to solve the above-described problem, an image diagnostic apparatus according to a first aspect of the present invention includes a diagnostic apparatus main body that collects image information with respect to an imaging target region of a subject, and a plurality of diagnostic apparatus main bodies connected to the diagnostic apparatus main body. An diagnostic imaging apparatus including an operation unit, wherein the diagnostic apparatus body moves at least one of an imaging system that collects the image information and the subject and the imaging system in order to set the imaging target region Moving means, interlock control means for generating a selection control signal based on the operation unit selection information supplied from the operation unit, and the movement control signal output by the operation unit based on the selection control signal. A control signal selection unit that performs selection control based on a control signal and supplies the control unit to the moving unit, wherein each of the operation units includes an operation unit selection information generating unit that generates the operation unit selection information; and the moving unit An input means for setting the movement control signal for driving, and an output control means for controlling the output of the movement control signal set by the input means based on a selection control signal of the interlock control means. It is said.

  According to the present invention, even when a selection control signal for selecting a predetermined movement control signal from movement control signals supplied from a plurality of operation units is erroneously generated due to noise or the like, the movement is performed. It is possible to prevent the mechanism from running away or moving in an unintended direction.

  Embodiments of the present invention will be described below with reference to the drawings.

  The features of the embodiments of the present invention described below are selected by the operator from the movement control signals supplied from the respective operation units in the image diagnosis apparatus having the diagnostic apparatus main body connected to the plurality of operation units. A function for controlling the output of the movement control signal based on the operation section selection information supplied from the selected operation section when the movement control signal from the operation section is selected and supplied to the movement mechanism section of the diagnostic apparatus main body; The object is to provide each of the interlock unit and the plurality of operation units in the diagnostic apparatus main body.

  In the following, the image diagnostic apparatus in the present embodiment will be described by taking an X-ray diagnostic apparatus for digestive organs as an example. However, the present invention is not limited to this, and X-ray diagnostics intended for circulatory organs or other diagnostic areas. It may be an apparatus, or may be another diagnostic imaging apparatus such as an MRI apparatus or an X-ray CT apparatus.

(Device configuration)
The configuration of the diagnostic imaging apparatus according to the embodiment of the present invention will be described with reference to FIGS. However, FIG. 1 is a diagram for explaining the outline of the diagnostic imaging apparatus, FIG. 2 is a block diagram showing the overall configuration of the diagnostic imaging apparatus, and FIG. 5 is connected to the diagnostic apparatus main body of the diagnostic imaging apparatus. It is a figure for demonstrating the detail of two interlocked operation parts and the interlock part which this diagnostic apparatus main body has.

  The diagnostic imaging apparatus 100 of the present embodiment shown in FIG. 1 generates a diagnostic apparatus main body 101 that collects X-ray projection data by irradiating a subject with X-rays, and generates a high voltage for irradiating X-rays. A high voltage generation unit 102, a first operation unit 103a and a second operation unit 103b for supplying a movement control signal to a moving mechanism unit 4 (described later) provided in the diagnostic apparatus main body 101, and the X-ray projection. An image data generation / storage unit 104 that generates and stores image data based on the data is provided.

  However, the first operation unit 103a is a proximity operation unit, and is installed together with the diagnostic apparatus main body 101 in an examination room shielded by X-rays. On the other hand, the second operation unit 103b is a remote operation unit, and is usually installed together with the image data generation / storage unit 104 in an operation room adjacent to the examination room.

  When the operation unit 103a installed in the vicinity of the diagnostic apparatus main body 101 is used, the operator is positioned near the subject, so that the instruction to the subject and the positioning of the fluoroscopic imaging table 5 provided in the diagnostic apparatus main body 101 can be performed. It becomes easy and the anxiety given to the subject can be reduced. On the other hand, when the operation unit 103b installed in the operation room is used, it is necessary to give an instruction to the subject through the microphone. However, X-ray exposure to the operator can be almost completely prevented, and thus protection is provided. It has the advantage that it is not necessary to wear an apron.

  Next, the configuration and function of each unit in the diagnostic imaging apparatus 100 will be described with reference to the block diagram of FIG.

  The diagnostic apparatus main body 101 of the diagnostic imaging apparatus 100 two-dimensionally detects the X-ray generation unit 1 that irradiates the subject 150 with X-rays and the X-rays that have passed through the subject 150, and uses this detection signal as a detection signal. An X-ray detection unit 2 that generates projection data based on the X-ray detection unit 2 and a holding unit (not shown) that holds the X-ray generation unit 1 and the X-ray detection unit 2. Movement control supplied from the operation unit selected by the operator from the plate 6 and movement control signals supplied from the operation unit 103a (first operation unit) and operation unit 103b (second operation unit) described later. An interlock unit 3 for selecting a signal, the above-described X-ray generation unit 1 and X-ray detection unit 2 (hereinafter collectively referred to as an imaging system) and a fluoroscopic imaging table based on the selected movement control signal. 5, Furthermore, the moving mechanism which moves the top plate 6 in a predetermined direction 4, a system controller 7 which generally controls each unit described above in the image diagnostic apparatus 100.

  The X-ray generator 1 includes an X-ray tube 15 that irradiates the subject 150 with X-rays, and an X-ray diaphragm that forms an X-ray weight (cone beam) with respect to the X-rays irradiated from the X-ray tube 15. 16 is provided. The X-ray tube 15 is a vacuum tube that generates X-rays, and accelerates electrons emitted from a cathode (filament) by a high voltage to collide with a tungsten anode to generate X-rays. On the other hand, the X-ray diaphragm 16 is located between the X-ray tube 15 and the subject 150 and has a function of narrowing the X-ray beam irradiated from the X-ray tube 15 to a predetermined irradiation size.

  The X-ray detector 2 converts the X-rays that have passed through the subject 150 into electric charges and stores them, a gate driver 22 for reading out the electric charges stored in the flat detectors 21, and a readout A projection data generation unit 13 that generates X-ray projection data from the generated charges is provided.

  The flat detector 21 is configured by two-dimensionally arranging minute detection elements in a column direction and a line direction. Each detection element senses an X-ray and generates a charge according to an incident X-ray dose. A film, a charge storage capacitor for storing charges generated in the photoelectric film, and a TFT (thin film transistor) for reading out the charges stored in the charge storage capacitor at a predetermined timing.

  The projection data generation unit 13 includes a charge / voltage converter 23 that converts the charge read from the flat detector 21 into a voltage, and an A / D converter 24 that converts the output of the charge / voltage converter 23 into a digital signal. And a parallel / serial converter 25 for converting the X-ray projection data read out in parallel in line units from the flat detector 21 and converted into digital data into a time series signal.

  The interlock unit 3 includes an interlock control unit 31 and a control signal selection unit 32. The interlock control unit 31 is configured to operate the operation unit selection button 51a of the operation unit 103a or the operation unit of the operation unit 103b via the system control unit 7. Based on the operation unit selection information supplied from the selection button 51b, a selection control signal for selecting a movement control signal supplied from the input unit 52a of the operation unit 103a and the input unit 52b of the operation unit 103b is generated. Then, the generated selection control signal is supplied to an output control unit 53a and an output control unit 53b described later provided in the control signal selection unit 32, the operation unit 103a, and the operation unit 103b.

  The control signal selection unit 32 of the interlock unit 3 includes a gate circuit. Based on the selection control signal supplied from the interlock control unit 31, the movement control signal from the operation unit 103a and the movement control signal from the operation unit 103b are displayed. Either one is selected and supplied to the moving mechanism unit 4. Details of the control signal selector 32 will be described later.

  On the other hand, the movement mechanism unit 4 receives the movement control signal supplied from the movement mechanism 41 for moving the fluoroscopic imaging table 5, the top plate 6 and the imaging system in a predetermined direction, and the control signal selection unit 32 of the interlock unit 3. A mechanism control unit 42 that generates a drive signal for moving the fluoroscopic imaging table 5 or the like in a predetermined direction and supplies the drive signal to the moving mechanism 41 is provided.

  Next, the fluoroscopic imaging table 5, the top plate 6, the imaging system provided in the diagnostic apparatus main body 101 of the diagnostic imaging apparatus 100, and the moving method thereof will be described with reference to FIG. 3.

  FIG. 3 shows a so-called overtable tube type diagnostic apparatus main body 101 in which the X-ray generation unit 1 is disposed above the fluoroscopic imaging table 5 and the X-ray detection unit 2 is disposed below. A top plate 6 on which a subject 150 (not shown) is placed is slidably attached to the upper surface of the fluoroscopic imaging table 5 provided in the diagnostic apparatus main body 101.

  In addition, arrows A to E shown in the figure indicate the moving directions of the fluoroscopic imaging table 5, the top plate 6, the X-ray generation unit 1 and the X-ray detection unit 2, and the arrow A indicates the start of the fluoroscopic imaging table 5. The tilt direction, arrow B indicates the vertical movement direction (long manual direction) of the holding unit 8 holding the X-ray generation unit 1 and the X-ray detection unit 2 (that is, the imaging system), and arrow C indicates the forward / backward movement direction of the X-ray generation unit 1 Furthermore, the arrow D and the arrow E indicate the vertical movement direction (long manual direction) and the horizontal movement direction (lateral manual direction) of the top plate 6, respectively.

  However, the tilting means a function of rotating the fluoroscopic imaging table 5 on which the subject 150 is placed in a range of standing → horizontal → reverse tilt (a position where the head is below the leg). The vertical movement direction is the body axis direction of the subject 150, and the horizontal movement direction and the front-back movement direction are directions orthogonal to the body axis direction.

  Returning to FIG. 2, the high voltage generator 102 generates a high voltage to be applied between the anode and the cathode in order to accelerate the thermal electrons generated from the cathode of the X-ray tube 15 in the X-ray generator 1. An X-ray control unit 12 that controls X-ray irradiation conditions such as tube current, tube voltage, and irradiation time in the high voltage generator 11 in accordance with an instruction signal supplied from the generator 11 and the system control unit 7 of the diagnostic apparatus main body 101. It has.

  On the other hand, the image data generation / storage unit 104 has a function of generating and storing image data to be displayed on the display unit 55 described later in the operation unit 103b, and includes a storage circuit and an arithmetic circuit (not shown). In the storage circuit, the projection data converted into the time-series signals in the line direction by the parallel / serial converter 25 of the projection data generation unit 13 in the X-ray detection unit 2 is sequentially stored to generate image data. . On the other hand, the arithmetic circuit performs image processing arithmetic on the generated image data for the purpose of contour enhancement, S / N improvement, or the like as necessary.

  Next, the operation unit 103a installed in the examination room and the operation unit 103b installed in the operation room respectively include operation unit selection buttons 51a and 51b, an input unit 52a and an input unit 52b, and output control units 53a and 53b. Further, the operation unit 103b has a display unit 55 for displaying the image data generated in the image data generation / storage unit 104.

  The operation unit selection buttons 51a and 51b are provided for the purpose of setting priority of movement control signals set in the operation units 103a and 103b, and the fluoroscopic imaging table 5, the top plate 6 and the like of the diagnostic apparatus main body 101 are set in a predetermined manner. When moving in the direction, the operator selects either the operation unit selection button 51a in the operation unit 103a or the operation unit selection button 51b in the operation unit 103b, whereby the input unit 52a or operation of the selected operation unit 103a is selected. The movement control signal supplied from the input unit 52 b of the unit 103 b is controlled by the output control unit 53 a or the output control unit 53 b and the mechanism control of the movement mechanism unit 4 via the control signal selection unit 32 of the interlock unit 3 in the diagnostic apparatus main body 101. Supplied to the unit 42.

  On the other hand, the output of the movement control signal supplied from the input unit 52 of the operation unit 103 that has not been selected is rejected by the output control unit 53 and the control signal selection unit 32 of the interlock unit 3 in the diagnostic apparatus main body 101. Supply to the mechanism control unit 42 is not performed.

  Next, the input units 52a and 52b have an operation panel and a display panel, and input of subject information, selection and setting of various conditions such as imaging conditions, display conditions, X-ray irradiation conditions, input of imaging start commands, etc. Is done. In addition, it has a function of setting a movement control signal for moving the fluoroscopic imaging table 5, the top plate 6, the X-ray generator 1 and the X-ray detector 2 in a predetermined direction.

  FIG. 4 shows a specific example of the operation panel provided in the input unit 52b of the operation unit 103b. The operation panel 60b includes an operation unit selection button 51b for selecting the operation unit 103b, a fluoroscopic imaging table. 5 for raising / lowering 5, a photographing switch 62 b for inputting a photographing start command, a top plate / imaging system movement switching switch 63 b for switching the vertical movement of the top plate 6 and the vertical movement of the imaging system, and the top plate 6. There is provided a top / imaging system moving lever 64b for vertically moving and horizontally moving and vertically moving the imaging system, and further for setting a lever for adjusting the opening of the X-ray diaphragm 16 and a photographing mode. Various switches are provided.

  For example, when the top / imaging system movement lever 64b is tilted in the left-right direction with the top / imaging system movement changeover switch 63b set to the imaging system movement, the left / right movement of the top 6 is performed. When tilted in the front-rear direction, the imaging system moves up and down. When tilted in an oblique direction, the imaging system is moved up and down and the top plate 6 is moved left and right at the same time.

  Further, when the top / imaging system moving lever 64a is tilted in the front-rear direction with the top / imaging system movement changeover switch 63a set to the top-plate movement, the top 6 is moved back and forth, and the oblique direction When tilted to the top, the top plate 6 is moved up and down and left and right at the same time.

  Returning to FIG. 2 again, the output control unit 53a of the operation unit 103a and the output control unit 53b of the operation unit 103b are configured by a gate circuit in the same manner as the control signal selection unit 32 of the diagnostic device main body 101, and the diagnostic device main body. The output control of the movement control signal supplied from the input units 52a and 52b is performed based on the selection control signal supplied from the interlock control unit 31 of 101, the details of which will be described later.

  On the other hand, the display unit 55 provided in the operation unit 103b includes a display data generation circuit, a conversion circuit, and a monitor (not shown). The display data generation circuit performs the processing on the image data generated by the image data generation / storage unit 104. Conversion processing corresponding to a predetermined display form is performed, and further, display data is generated by synthesizing the accompanying information such as numbers and various characters. Next, the conversion circuit performs D / A conversion and television format conversion on the display data to generate a video signal and display it on the monitor.

  Next, specific circuit configurations of the operation units 103a and 103b, which are important units in the present embodiment, and the interlock unit 3 in the diagnostic apparatus main body 101 will be described with reference to FIG.

  Each of the operation unit 103a and the operation unit 103b includes, for example, switches SW1a and SW1b for setting a movement control signal for raising and lowering the fluoroscopic imaging table 5, switches SW2a and SW2b for moving the imaging system up and down, and X-ray generation Switches SW3a and SW3b for moving the unit 1 back and forth, switches SW4a and SW4b for moving the top plate 6 up and down, and SW5a and SW5b for moving the top plate 6 left and right are provided. However, in FIG. 5, the switches SW3a, SW3b, SW4a, and SW4b are omitted.

  One terminal of the above-described switches SW1a to SW5a and switches SW1b to SW5b is grounded, and the other terminal is a gate circuit (AND circuit) A1a to A5a constituting the output controller 53a and a gate circuit constituting the output controller 53b. (AND circuit) Connected to the second input terminals of A1b to A5b. The output terminals of the gate circuits A1a to A5a and the gate circuits A1b to A5b are gate circuits (AND circuits) B1a to B5a and gate circuits (AND circuits) B1b to B5b that constitute the control signal selection unit 32 of the interlock unit 3. Are connected to the second input terminal.

  On the other hand, the first output terminal of the interlock control unit 31 in the interlock unit 3 is the first input terminal of the gate circuits B1a to B5a in the control signal selection unit 32 and the gate circuit A1a in the output control unit 53a of the operation unit 103a. To the first input terminal of A5a, the second output terminal of the interlock control unit 31 is the first input terminal of the gate circuits B1b to B5b in the control signal selection unit 32 and the output control unit of the operation unit 103b. 53b is connected to the first input terminal of the gate circuits A1b to A5b.

  Further, the output terminals of the gate circuits B1a and B1b in the control signal selection unit 32 are connected to the input terminals of the gate circuit (OR circuit) C1, and similarly, the gate circuits B2a and B2b,. The output terminals of B5b are connected to the input terminals of the gate circuits C2,... C5, respectively. The output terminals of the gate circuits C1 to C5 are connected to the mechanism control unit 42 of the moving mechanism unit 4.

  Further, the operation units 103a and 103b are provided with operation unit selection buttons 51a and 51b in addition to the input units 52a and 52b and the output control units 53a and 53b as described above, and the output terminals thereof are the system of the diagnostic apparatus main body 101. It is connected to the control unit 7.

  Next, operations of the operation units 103a and 103b having the above-described configuration and the interlock unit 3 of the diagnostic apparatus main body 101 will be described with reference to FIG.

  For example, the operator selects the operation unit 103b using the operation unit selection button 51b, and tilts the fluoroscopic imaging table 5 in a predetermined direction by a tilting lever 61b (see FIG. 4) provided in the input unit 52b. In this case, the interlock control unit 31 of the interlock unit 3 that has received the operation unit selection information from the operation unit selection button 51b via the system control unit 7 receives the first inputs of the gate circuits B1a to B5a of the control signal selection unit 32. A selection control signal having an L level DC voltage is supplied to the first input terminals of the gate circuits A1a to A5a in the output control unit 53a of the operation unit 103a, and the gate circuits B1b to B1b of the control signal selection unit 32 are further supplied. An H level selection control signal is supplied to the first input terminal of B5b and the first input terminals of the gate circuits A1b to A5b in the output control unit 53b of the operation unit 103b. To.

  At this time, the switches SW1a to SW5a in the input unit 52a of the operation unit 103a and the switches SW1b to SW5b in the input unit 52b of the operation unit 103b are in a conductive state, and accordingly, in the output control unit 53a of the operation unit 103a. The second input terminals of the gate circuits A1b to A5b in the output circuits 53b of the gate circuits A1a to A5a and the operation unit 103b are set to L level (GND level).

  Next, the operator tilts the raising / lowering lever 61b (see FIG. 4) provided on the operation panel 60b of the operation unit 103b in a direction corresponding to a desired raising / lowering direction, thereby turning off the switch SW1b of the input unit 52b. Thus, an H-level movement control signal is supplied to the second input terminal of the gate circuit A1b in the output control unit 53b. At this time, the switch SW1a of the input unit 52a in the operation unit 103a that has not been selected may be in either a cut-off state or a conductive state.

  That is, the H-level movement control signal (rising control signal) set by the switch SW1b of the input unit 52b is output as it is from the gate circuit A1b of the output control unit 53b and is output from the control signal selection unit 32 of the interlock unit 3. The signal is input to the second input terminal of the gate circuit B1b. At this time, as described above, the H level selection control signal is supplied from the interlock control unit 31 to the first input terminal of the gate circuit B1b. The signal is output from the circuit B1b and input to the second input terminal of the gate circuit C1 at the next stage.

  On the other hand, when the L level selection control signal is supplied from the interlock control unit 31 to the first input terminal, the output of the gate circuit A1a in the output control unit 53a of the operation unit 103a is the movement control signal for the second input terminal. Regardless of whether or not is applied, the L level is always set, and the L level output is input to the second input terminal of the gate circuit B1a in the control signal selection unit 32 of the interlock unit 3. At this time, the L level selection control signal is supplied from the interlock control unit 31 to the first input terminal of the gate circuit B1a as described above, and accordingly, the L level output from the gate circuit B1a is supplied. The signal is input to the first input terminal of the next-stage gate circuit C1.

  Accordingly, only the H-level movement control signal output from the gate circuit B1b in the gate circuit C1 having the function of the OR circuit is output and supplied to the mechanism control section 42 of the movement mechanism section 4.

  That is, the movement control signal set by the switch SW1b of the input unit 52b in the operation unit 103b selected by the operator is the gate circuit A1b of the output control unit 53b in the operation unit 103 and the control signal selection unit 32 in the interlock unit 3. Are supplied to the mechanism control unit 42 of the moving mechanism unit 4 through the gate circuit B1b and the gate circuit C1, and the fluoroscopic imaging table 5 is tilted in a predetermined direction.

  Similarly, the movement control signals set by the switches SW2b to SW5b of the input unit 52b are similar to the gate circuits A2b to A5b of the output control unit 53b and the gate circuits B2b to B5b of the control signal selection unit 32 of the interlock unit 3, respectively. It is supplied to the mechanism control unit 42 of the moving mechanism unit 4 through the gate circuits C2 to C5, and the imaging system is moved up and down, the X-ray generation unit 1 is moved back and forth, and the top plate 6 is moved up and down and moved left and right.

  On the other hand, the movement control signal set by the input unit 52a of the operation unit 103a that has not been selected is cut off by the gate circuits A1a to A5a of the output control unit 53a and the gate circuits B1a to B5a of the control signal selection unit 32. The signal is not output from the control signal selection unit 32 to the movement mechanism unit 4.

  In FIG. 5, for the sake of simplicity of explanation, the case where each input unit 52 of the operation units 103 a and 103 b sets a movement control signal for one channel for the movement of a predetermined movement mechanism has been described. When the top plate 6 is moved left and right, the movement control signal for the leftward movement and the movement control signal for the rightward movement are set independently. That is, the input units 52a and 52b of the operation units 103a and 103b have two channels (one pair) for each of the up-and-down movement of the fluoroscopic imaging table 5, the vertical movement of the imaging system, the vertical movement of the top plate 6, and the horizontal movement. A switch circuit is provided, and a movement control signal for a predetermined direction is set using either one of the two-channel switch circuits.

  Incidentally, in the conventional diagnostic imaging apparatus, the diagnostic apparatus main body 201 has a function of selecting and controlling the movement control signals supplied from the operation units 203a and 203b based on the operation unit selection information as already described with reference to FIG. Since only the interlock unit 3X has, when a control signal selection unit (not shown) of the interlock unit 3X malfunctions due to external noise or the like, an incorrect movement control signal is supplied to the movement mechanism unit 4X. There is a risk of causing the fluoroscopic imaging table 5X of the diagnostic apparatus main body 201 to run away.

  In the above-described embodiment, the operation units 103a and 103b are provided with the output control units 53a and 53b having the function of selecting the movement control signal, so that the moving mechanism 41 malfunctions or runs out of control. The frequency is significantly reduced.

  For example, instead of selecting the movement control signal from the operation unit 103b, the control signal selection unit 32 of the interlock unit 3 illustrated in FIG. 5 selects the movement control signal from the operation unit 103a due to a malfunction or the operation unit 103a. Even if the movement control signals from the operation unit 103b are selected at the same time, the output control units 53a and 53b of the operation unit 103a and the operation unit 103b can output the movement control signals output from the operation units 103 to the operation unit. Since the output control is performed in advance based on the selection information, it is possible to prevent the interlock unit 3 from outputting an erroneous movement control signal to the movement mechanism unit 4.

  According to the embodiment of the present invention described above, when a predetermined movement control signal is selected from the movement control signals supplied from a plurality of operation units and supplied to the movement mechanism unit, the operation unit from the operation unit is selected. By providing each of the interlock unit and the operation unit of the diagnostic apparatus main body with a function for selecting or controlling the output of the movement control signal according to the selection control signal generated based on the selection information, the selection function in the interlock unit is provided as an external function. Even if malfunction occurs due to noise or the like, supply of an erroneous movement control signal to the movement mechanism unit can be suppressed. Accordingly, it is possible to reduce the runaway frequency of the moving mechanism in the fluoroscopic imaging table, the top plate, the imaging system, or the like, or the frequency of movement in an unintended direction.

  As mentioned above, although the Example of this invention has been described, this invention is not limited to the above-mentioned Example, It can change and implement. For example, the X-ray detection unit 2 in the diagnostic imaging apparatus 100 shown in the above-described embodiment has described the method of directly converting X-rays into electric charges, but the method of converting X-rays into light and then converting them into electric charges. It does not matter. X-ray I.D. I. And a system using an X-ray TV camera.

  Further, in the above-described embodiment, a movement control signal is supplied to the fluoroscopic imaging table 5, the top plate 6, the imaging system, and the moving mechanism unit 4 of the X-ray generation unit 1 provided in the X-ray diagnostic apparatus for digestive organs. Although the case has been described, the present invention is not limited to this. For example, in the case of an X-ray diagnostic apparatus for a circulatory organ, a C arm or Ω arm that holds the X-ray generation unit 1 and the X-ray detection unit 2 (imaging system) or a moving mechanism unit of a stand unit that holds the C arm A movement control signal may be supplied to.

  In addition, the output control units 53a and 53b in the operation unit 103a and the operation unit 103b, or the control signal selection unit 32 in the interlock unit 3 has been described as being configured by a gate circuit, but it is configured using other circuit elements. However, the circuit configuration is not limited to the circuit configuration shown in FIG.

  On the other hand, the interlock control unit 31 of the diagnostic apparatus main body 101 starts from the system control unit 7 when the fluoroscopic imaging table 5, the top panel 6, the imaging system, etc. move beyond a preset movement range (positional tolerance). A selection control signal may be generated based on the supplied movement stop signal and the operation unit selection information supplied from the operation units 103a and 103b.

  For example, the fluoroscopic imaging table 5, the top plate 6, the imaging system, and the like described above include a position detector (not shown) that detects the position after movement, and the system control unit 7 includes the position detection result supplied from the position detector. A position allowable value stored in advance in a storage circuit (not shown) is compared. When the position detection result exceeds the allowable position value, the movement stop signal is supplied to the interlock control unit 31 of the interlock unit 3 together with the operation unit selection information supplied from the operation unit 103a or the operation unit 103b.

  On the other hand, when the movement stop signal is supplied from the system control unit 7, the interlock control unit 31 selects control for cutting off the movement control signals from the input units 52a and 52b regardless of the presence or absence of the operation unit selection information. A signal is generated and supplied to the control signal selection unit 32 and the output control units 53a and 53b of the operation units 103a and 103b. In this way, the selection control signal is generated based on the movement stop signal and the operation unit selection information, and the supply of the movement control signal to the movement mechanism unit 4 is controlled using the obtained selection control signal. Safety can be further improved.

  As described above, the image diagnostic apparatus of the present invention is not limited to the X-ray diagnostic apparatus for digestive organs, but may be an X-ray diagnostic apparatus for cardiovascular or other diagnostic areas. Also, other image diagnostic apparatuses such as an MRI apparatus and an X-ray CT apparatus may be used.

1 is a diagram showing a schematic configuration of an image diagnostic apparatus in an embodiment of the present invention. The block diagram which shows the whole structure of the diagnostic imaging apparatus in the Example. The figure which shows the fluoroscopic imaging stand, top plate, imaging system, and its moving method in the diagnostic imaging apparatus of the Example. The figure which shows the specific example of the operation panel provided in the input part of the Example. The figure which shows the specific circuit structure of the operation part in the Example, and the interlock part of the diagnostic apparatus main body. The figure for demonstrating the interlock function in the conventional image diagnostic apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... X-ray generation part 2 ... X-ray detection part 3 ... Interlock part 4 ... Movement mechanism part 5 ... Perspective imaging stand 6 ... Top plate 7 ... System control part 8 ... Holding part 11 ... High voltage generator 12 ... X-ray Control unit 13 ... projection data generation unit 15 ... X-ray tube 16 ... X-ray restrictor 21 ... flat detector 22 ... gate driver 23 ... charge / voltage converter 24 ... A / D converter 25 ... parallel / serial converter 31 ... Interlock control unit 32 ... Control signal selection unit 41 ... Movement mechanism 42 ... Mechanism control units 51a, 51b ... Operation unit selection buttons 52a, 52b ... Input units 53a, 53b ... Output control unit 60b ... Operation panel 61b ... Tilting lever 62b ... Shooting switch 63b ... Top / imaging system movement changeover switch 64b ... Top / imaging system moving lever 100 ... Diagnostic imaging device 101 ... Diagnostic device body 102 ... High voltage generators 103a, 103b ... Operation unit 1 04 ... Image data generation / storage unit

Claims (5)

A diagnostic apparatus main body that collects image information for an imaging target region of a subject, and an image diagnostic apparatus that includes a plurality of operation units connected to the diagnostic apparatus main body,
The diagnostic device body is:
An imaging system for collecting the image information;
Moving means for moving at least one of the subject and the imaging system to set the imaging target region;
Interlock control means for generating a selection control signal based on the operation unit selection information supplied from the operation unit;
Control signal selection means for selecting and controlling the movement control signal output from the operation unit based on the selection control signal based on the selection control signal and supplying the movement control signal to the movement means;
Each of the operation units
Operation unit selection information generating means for generating the operation unit selection information;
Input means for setting the movement control signal for driving the movement means;
An image diagnostic apparatus comprising: output control means for controlling output of the movement control signal set by the input means based on a selection control signal of the interlock control means.   The moving means includes position detecting means for detecting a position after movement, and the interlock control means is supplied from a movement stop signal generated based on a position detection result by the position detecting means and the operation unit. The image diagnostic apparatus according to claim 1, wherein the selection control signal is generated based on operation unit selection information.   The image diagnosis according to claim 2, further comprising a movement stop signal generation unit, wherein the movement stop signal generation unit generates the movement stop signal based on the position detection result and a preset position allowable value. apparatus.   The imaging system includes X-ray generation means for emitting X-rays to the subject, and X-ray detection means for generating projection data by detecting X-rays transmitted through the subject. The diagnostic imaging apparatus according to any one of claims 1 to 3.   The image diagnosis according to claim 1, wherein the moving unit moves at least one of an imaging table and a top plate on which the subject is placed and the imaging system in a predetermined direction based on the movement control signal. apparatus.

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