JPS6254500B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for controlling the position (including tilting and rotational postures) of an imaging table (bed) in a diagnostic radiation apparatus.

In terms of X-ray diagnostic technology, especially in contrast imaging of the gastrointestinal tract,
There is a tendency to allow a greater degree of freedom in controlling the position of the imaging table in order to obtain appropriate information by allowing the subject to take various body positions and moving the contrast medium. FIG. 1 shows the type of position control of the photographing stand, and FIG. 2 shows an example of the operation console. For example, as shown in FIG. 1, the diagnostic radiology apparatus includes an X-ray tube 1,
It is composed of a collimator 2, a photographing table 3, an image receiving device 4, a column 5, a center "0" 6 of the photographing table, etc.
The position control is performed by the combination of ±A direction (front and back), ±B direction (left and right), ±C (up/down), ±D (rotation), and ±E (rolling) as shown in Fig. 1. It is. FIG. 2 shows a typical example of a console and control lever for this purpose. Lever X
is for front and rear and left and right directions, lever Y is for raising and lowering, and lever Z is for controlling rotation and rolling. Fig. 3 shows the switch groups 8, 9, 10, 11 combined with the control lever 7. 7
The switch on the side that has been knocked down is turned on, and each drive motor is rotated via a group of relays (not shown). The operator sequentially operates the control levers shown in FIG. 2 to set the imaging table at a predetermined position and posture while monitoring the imaging table or the fluoroscopic X-ray image.

Such conventional position control devices are complicated to operate, require the operator's skill, and require continuous monitoring of the movement state during operation. In addition, X-ray diagnosis is a differential diagnosis between X-ray image findings and anatomical findings, and accurate positioning of the imaging table is an important issue, but manual operation alone is difficult and has disadvantages such as not being able to do it quickly. It was hot.

The present invention solves the above-mentioned drawbacks and provides an imaging platform control device which has the following characteristics: the imaging platform can be positioned quickly, is accurate, is easy to operate, and can be combined with conventional devices. The purpose is to provide

The details will be explained below. Figure 4 shows invention 1
The block circuit diagram used in the embodiment, FIG. 5, is an explanatory diagram of the operation console. In the case of examinations of the gastrointestinal tract, particularly the stomach, the photographing positions of the subject (the subject's position and posture) are standardized, and the sequence of photographing positions is usually performed in the following order. That is,
0... Reset position, 1... Prone relief, 2... Standing position (first oblique) esophagus, 3... Standing position (front), fullness,
4...prone position, fullness, 5...supine position, double contrast angiography, 6...
The order is supine position, (first oblique position) double imaging, 7...semi-recumbent position (second oblique position), and 8... standing position (first oblique position). For other imaging sites, such as the rectum, other imaging position sequences also exist. FIG. 5 shows an example of an operator console used in the present invention, which usually constitutes a part of the operator console shown in FIGS. 2 and 3, or is used independently. Numerals 51 to 55 are illuminated pushbuttons, which when pressed close circuit contacts and illuminate themselves. The pushbuttons 51 or 53 and 54 are connected to each other by a locking mechanism, and only one pushbutton is turned on (or lit). Each pushbutton has the following functions. 51...Push button for selecting the imaging region; 52...Push button for instructing the reset position; when this push button is pressed, all control mechanisms (control mechanisms in directions A to E in Figure 1) are set to the relative zero position. Return to 53...The first photographing position push button. When this push button is pressed, the photographing platform automatically reaches a predetermined position. At this position, the operator can correct individual differences among the subjects using the console shown in FIGS. 2 and 3. The amount of movement of any one of A to E that corresponds to the correction affects the preset position of A to E that corresponds to the above of the push button 54 that will be operated later. That is, the corrected movement amount becomes effective for subsequent preset control as a correction for individual differences. 54...Second to nth pushbuttons, which correspond to the respective sequence numbers, for example, and can automatically control the respective preset positions. After reaching the preset position, corrections can be arbitrarily applied to the corresponding controls A to E using the manual installation console shown in FIGS. 2 and 3. The corrected photographic platform position does not affect the preset positions of other pushbuttons. Also 53 and 54
You can press the pushbuttons any number of times in any order.
55...A storage push button. When pressed, the storage device enters the light mode, and photographing platform position information is stored in the storage device in correspondence with the push buttons 53 and 54. When this pushbutton is not pressed, the storage device enters a read mode, and photographing platform position information is read out in correspondence with pushbuttons 53 and 54. 5
6 and 57 are cables and connectors that connect to related equipment.

FIG. 4 shows details of an example of a circuit having the functions of each pushbutton shown in FIG. A corresponds to the console shown in FIG. 5, a ₁ is the imaging site, a ₂ , a ₃ , and a ₄ are imaging position push buttons, and a ₅ is a storage push button. _a1 to _a5
correspond to 51 to 55 in FIG. 5, respectively. Illumination lamps for each pushbutton are not shown. _A6 is an encoder that encodes the signals generated at _a1 to _a4 into a binary code. b is a digital data processing section,
b ₁ is a storage device in which digital data can be written and read, and b ₂ is a digital data adder. a ₅ is
When OFF, storage device _b1 is in read mode,
With the address signal formed by encoder _a6 ,
Specified position control digital data is set in a reversible counter 103 via an output latch gate 102 by a bus line 101. On the other hand, when any one of pushbuttons _a2 to _a4 is pressed, a set signal 104 is sent from encoder _a6 to flip-flop 1.
05, the flip-flop 105
The Q output 106 of is outputted to AND gates 107 and 108. However, when the data 109 set in the reversible counter 103 is positive, the AND gate 10
8 is output, and when it is negative, AND gate 107 outputs. 110 is an inverter for the positive and negative signals 109; 111 is a drive device composed of a drive motor and a variable speed gear for controlling the photographing platform; 112 is a detector for the rotation speed or rotation angle of the rotating drive device;
By optical reflection or magnetic detection, the number of rotations is outputted from the waveform shaping circuit 113 as a number of pulses with the required precision. The output of the waveform shaping circuit 113 is used as a clock signal to cause the reversible counter 103 to pass through a gate 114 to count additively, and to pass through a gate 115 to count subtractively. 116 and 11
7 is an OR gate; the former opens gate 114, and the latter opens gate 115. Switches 120 and 125 correspond to the switches attached to the control levers of the operating console shown in FIGS. 2 and 3. The drive device 111 is the switch 1
When switch 20 is turned on, relay 122 is turned on, closing relay contacts 123 and 124, and rotates in the direction of arrow CCW. When switch 125 is turned on, relay 126 is turned on, closing relay contacts 127 and 128, and rotating in the direction of arrow CW. Rotate in the direction and OR
Gates 114 and 115 are opened via gates 116 and 117, and a clock generated by rotation is added to or subtracted from reversible counter 103. Further, this drive device 111 closes the relay contact 130 by the relay driver 133 and the relay 129 in the CCW direction, and similarly closes the relay contact 132 by the relay driver 134 and 131 to rotate in the CW direction. Next, furthermore,
In the case of preset control, for example, when any of the pushbuttons _a4 is pressed, the contents of the reversible counter 103, which receives input from the encoder _a6 , passes through the input gate 119 and enters the adder _b2 . On the other hand, digital data corresponding to A ₄ is also transferred from storage device B ₁ to adder B _2.
to go into. Both are added at b ₂ and the result is sent back to the reversible counter 103. Also, when _A4 is pressed, the flip-flop 105 is set by the set signal 104 from the encoder _A6 , so if the data on the reversible counter 103 is positive, the drive motor starts rotating in the CW direction, and the gate 115 is turned on. The contents of the reversible counter 103 are counted backwards by the clock generated by the waveform shaping circuit 113.
Finally, the content becomes zero. At this time, the output of the OR gate 118 changes and the flip-flop 10
5 is reset, the drive motor 111 stops. That is, the drive motor 111 is connected to the reversible counter 103.
Accurately determine the cumulative number of rotations according to the contents and move the photographing platform to a predetermined position. In addition, in the case of manual control, for example, when the switch 125 is turned on, the drive motor 11 is activated via the contact 127 of the relay 126.
1 rotates in the CW direction. The other contact 128 is also turned on at the same time, and the gate 11 is connected via the OR gate 117.
5 is opened, and the reversible counter 103 counts the clocks. The counted contents are added to the next preset control value. Preset control: When pressing pushbuttons at random If, for example, a pushbutton is pushed out of pushbuttons 53 and 54 in FIG. 3 during the preset control process, the digital data processing unit The memory data corresponding to all the lifted pushbuttons is accumulated in order from left to right in the figure, and finally, the contents of the reversible counter 103 are added, and then the data is returned to the reversible counter 103 again. Therefore, random push button operation for preset control is possible. Next, when the reset push button is pressed, the signal 135 enters the reversible counter 103 and its contents are cleared when the reset push button _a2 is held down, and the drive motor 111 is moved in the CCW direction via the OR gate 116. Although it continues to rotate, it eventually stops because the limit switch of the photographing stand (not shown) is connected in series to the contact 123. A plurality of drive motors 111 and preset control devices are provided corresponding to each of the control mechanisms A to E, except for a and a digital processing section b shown in FIG. 4, which correspond to the operation console.

The digital processing section b shown in FIG. 4 may be replaced with a microcomputer, and the push buttons 51 and 5 of the operation console shown in FIG.
Of course, the numbers 3 and 54 may be increased or decreased depending on the required number. Further, in FIG. 4, the clock is generated by the detector 112 and the waveform shaping circuit 113, but this may be replaced by a self-oscillating clock generator. It is also possible to add a pushbutton 58 to the operation console as shown in FIG. 6, and give it the following functions. That is, when this push button 58 is not pressed, it is the same as above, and when this button is pressed, the position of the imaging platform is changed from the left of the push buttons 53 and 54 in the figure every time an image is completed by X-ray exposure. Moving the sequence to the right automatically advances from 0 to n. The progress of the sequence can be known by sequentially lighting up the corresponding pushbuttons. This function can be obtained, for example, by a circuit configuration as shown in FIG. That is, for FIG. 4, a decoder a ₁₃ , a binary counter a ₁₄ , a switching gate a ₁₅ , a control signal line a ₁₆ , a push button switch a ₁₇ , a display lamp a ₁₈ , an X-ray exposure signal input terminal
A ₁₉ has been added. A ₇ to _{a 12} indicate indicator lamps integrated with pushbutton switches a ₁ to a ₅ , respectively. Further, data processing device b indicates the same data processing device as shown in FIG. One pulse arrives from the terminal a ₁₉ every time X-ray exposure is completed, and the binary counter a ₁₄ counts it. Counting results are decoder
Indicator lamps a ₉ , a ₁₀ ... a ₁₁ etc. are lit by a ₁₃ .
On the other hand, the output of binary counter a ₁₄ passes through gate a ₁₅ and reaches data processing device b. Gate a ₁₅ is binary counter a ₁₄ when pushbutton switch a ₁₇ is ON.
When the encoder a6 is OFF, the output of the encoder _a6 is outputted to the data processing device b. When the pushbutton switch _A17 integrated with the display lamp _A18 is ON, the output of the binary counter _A14 is outputted, and when it is OFF, the output of the encoder _A6 is outputted to the data processing device B.
When pushbutton switch _A17 is turned OFF, automatic sequence progression is stopped and re-shooting is possible as many times as desired.

The present invention is as described above, and can be easily constructed by combining with or adding to conventional devices. Since most of the complicated operations proceed automatically according to a predetermined sequence set in advance, there is no need to place a large burden on the operator even when setting various postures. It is also possible to make corrections for each step as necessary, and this amount of correction not only corrects individual differences and improves accuracy, but also is effective for subsequent preset control, and this correction does not disturb the preset conditions. . It has the following advantages, and it is highly effective because accurate imaging data useful for radiological diagnosis can be easily obtained.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of an example of the position control type of the imaging table of a radiation device, FIGS. 2 and 3 are explanatory diagrams of the operation console of a conventional device, and FIG. 4 is a control circuit diagram used in the first embodiment of the present invention 5 is a perspective view of an operator console corresponding to FIG. 4, FIG. 6 is a perspective view of an operator console in another embodiment, and FIG. 7 is a control circuit diagram used in another embodiment. 51-54, 58, _a1 - _a8 ...indicator, X, Y,
Z...operator, 52, a ₂ ...reset indicator, 53,
54, a ₃ , a ₄ ... Shooting position indicator, 55, a ₅ ... Memory indicator, 111... Drive device, 112, 113... Clock generator, 103... Reversible counter, 10
7, 108, 116 to 118, etc...Gate circuit, b ₁
…storage device, b ₂ …digital adder.

Claims (1)

[Scope of Claims] 1. The device has a preset operation type indicator and an operator's manual operation device, and the indicator is connected to a reset position indicator that returns all control mechanisms to relative zero positions. An operating console having at least a preset imaging position indicator for manually correcting individual differences among examiners, and a memory indicator for preset conditions for each imaging position and the individual difference conditions to be added thereto; a drive device provided for each type of operation so as to be activated by an indicator or an operation device on the desk and cause the photographing platform to perform an operation corresponding to each operation; and a clock generator that counts the amount of operation of each drive device;
A reversible counter that inputs and calculates preset data from a storage device and the clock, a gate circuit that controls the operation of the reversible counter, a storage device that can read and write preset data and individual difference correction data, and a storage indicator. 1. A preset control device for an imaging table of a radiological diagnostic apparatus, comprising a digital adder that adds stored data and operation contents of a reversible counter according to an instruction. 2. The radiation diagnostic apparatus according to claim 1, characterized in that the read/write storage device and the digital adder are replaced with a microcomputer, and the microcomputer is equipped with a control program corresponding to random operations of the operating device. Preset control device for the camera stand.