JPH0244699A - X-ray diagnosis device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] TECHNICAL FIELD The present invention relates to an X-ray diagnostic device, particularly for mass medical examinations and the like.

The present invention relates to an X-ray diagnostic device that is most suitable for

For example, in mass gastric examinations, etc., a large number of examinees (also referred to as subjects) are diagnosed based on a formalized diagnostic routine. Conventionally, in these fields, X-ray technicians (hereinafter also referred to as operators) have been required to operate the Xa generator, such as manually setting the imaging conditions, or independently determine the imaging position, such as operating the X-ray fluoroscopic imaging table (for each imaging session). I was going to For this reason, it takes a lot of time to make a diagnosis, and in addition to that, considering the time spent interacting with patients, it places a heavy burden on the X-ray technicians9, and in some cases, multiple technicians are required. There was a problem. Furthermore, the patient is also burdened with unnecessary exposure to X and IJ radiation during imaging positioning.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an X-ray diagnostic apparatus that can significantly shorten the time for imaging positioning and reduce the exposure dose of the patient. It is.

The present invention will be specifically explained below using examples.

FIG. 1 shows an embodiment of the X-ray diagnostic apparatus of the present invention.

FIG. 2 is a system block diagram. Note that among the signal lines, thin lines are single signal lines, thick black lines are multiple signal lines, and thick white lines are binary signal lines. This X-ray diagnostic apparatus includes an operation panel 1 having a plurality of pushbutton switches SWo to S'w17, and three types of signals from the operation panel 1, namely switches S'w1 to S'w1.
Shooting mode selection signal S1° switch SW1 according to history 9
The physique data selection signal S2 from o to S'w15 and the switch 5w025w16, 5w17 stem mode control signal SO are latched, and three types of output signals Sa, Ss, corresponding to the latched signals are generated at predetermined timings.
A latch circuit 2 that outputs a signal S6, a gate circuit GO that receives the photographing mode selection signal S1 from the operation panel l and outputs a predetermined gate signal S3, and an output S3 of the gate circuit GO.
One of the display control signals S7 is output based on the relationship between and the outputs S4 and 85 of the latch circuit 2, and the exposure control described later is performed based on the relationship between the two outputs S4 and S5 of the latch circuit 2. A control signal generation circuit 3 that generates a signal S8 for controlling the signal generation circuit 6 and the bed drive control signal generation circuit 7, and a connection between the output S3 of the gate circuit GO and a predetermined intermediate output of the control signal generation circuit 3. An X-ray exposure timing control circuit 5 generates an X-ray exposure timing signal S9 based on a relationship, etc., and an X-ray exposure timing control circuit 5 generates an X-ray exposure timing signal S9 based on the relationship between the output S9 and the other output S8 of the control signal generation circuit 3. Signal S
10. An X-ray exposure control signal generation circuit 6 that outputs an X-ray tube voltage setting signal S11 and an X-ray tube current setting signal S12, an output S8 of the control signal generation circuit 3, and each mechanism of an imaging bed (not shown) The control signal S for driving the bed is based on the comparison with the output S1s of the position detection circuit 8 that detects the current position of the
14; a bed drive control circuit 9 controlled by the control signal Set;
A match signal 818 is generated when the bed mechanism section 10 including a plurality of motors driven by the drive signal S15 from the control circuit 9 and the plurality of signal outputs S17 of the bed drive control signal generation circuit 7 all match. The output 818 of the matching circuit 11 is connected to the control signal generating circuit 3. The display circuit 4 is configured to be inputted to each control terminal of the X-ray exposure timing control circuit 5 and the latch circuit 2, and the position detection circuit 8 is configured to input signals based on the momentum of each mechanism in the bed mechanism section 10. It is controlled by a signal S16. A comparison output 819 is derived from the exposure control signal generation circuit 6, and is applied to each control terminal of the antidrug signal generation circuit 3 and the X-ray exposure timing control circuit 5. Here, among the push button switches SWo to 5W17, the upper switches SW+ to Sw
9 indicates the shooting mode (for example No.
is a prone mucosal image, and N02 is a full-body image in a normal and balanced position...
The switches SWtO to 5W12, which are configured for selection (such as -) and are located lower than the middle part, are switches for selecting the body thickness of the subject (for example, sequentially thick "F").

The switches sw+s to 5w15 are configured as switches for selecting the subject's height (for example, in order, high "T", 2 normal rNJ, F low "S").
The switch 5W16 is configured as an "arbitrary program selection switch", the switch 5W17 indicated by a broken line is configured as a "fully automatic program selection switch", and the last switch SWo is configured as a "switch for fully automatic program selection".
It is configured as a "reset mode setting switch". Note that each output 810 to S of the exposure control signal generation circuit 6
It goes without saying that 12 is applied to an X-ray control circuit (not shown). In addition, the switch 5 of the panel 1
All of w0-8w17 are momentary type switches, and are so-called self-illuminated switches in which the switches themselves light up when pressed by the latch circuit 2 and display circuit 4.

FIG. 2 is a circuit diagram showing an example of a specific configuration of the device. In addition, in the figure, a semi-automatic program (a configuration in which imaging positioning and X-ray exposure are automatically performed by sequentially operating the imaging mode selection switches Sw1 to SW9) and an arbitrary program (operator's program) are shown. This example shows a fully automatic program (a configuration in which shooting is performed in accordance with any selected shooting mode), and a fully automatic program (a configuration in which shooting in all shooting modes is automatically performed in a rigid manner by simply pressing the shooting start button). ) K will be described later.

One end of each contact of each of the pushbutton switches Sw1 to 5w16 and SwO in the operation panel l is grounded, and the power supply (+Vcc) voltage is applied to the other end of each contact via a pull-up resistor. Inverters 1N1 to 1N16 and INo are connected to the signal deriving path, respectively. The latch circuit 2 is connected to each inverter N of the operation panel l.
1~■ J- type flip-flop FF1~ with the outputs of N16 and INo connected to the clock terminal (CK), respectively.
It is composed of FF16 and FFo. here,
Flip 70 knobs FF1 to FF9 are for latching the shooting mode selection signal, FF10 to FF15 are for latching the physique data selection signal, FF16 is for latching the arbitrary program selection signal,
Furthermore, FFo is used for latching a reset position setting signal. The gate circuit Go is constituted by a NOR gate circuit (2)0 having multiple inputs as the outputs of the inverters N1 to IN9 of the operation panel (1).

The control signal generation circuit 3 includes a first mono-multi NIM1 which commonly applies a reset output to the reset terminals of the flip-flops FF1 to FF9 for latching the photographing mode selection signal of the latch circuit 2, and the flip-flops FF1 to FF9 of the latch circuit 2.
A first encoder ED1 which receives the output of FF9 as a multi-input and generates a binary output; a first counter CT1 which receives an output to a logic combinational circuit 3 (to be described later) as an input and generates a binary output; A binary output is received at one input terminal (IN, -A), a binary output of the first encoder ED1 is received at the other input terminal (IN-B), and a part of the output of the logic combinational circuit 3A is switched. A first switching circuit CG1 that switches and derives one of the binary outputs as a signal, and a decimal decoder that receives the binary output of the first switching circuit CG1 and selectively outputs a numerical value (0 to 9) corresponding to the value. DD and the outputs "1" to "9" of the decimal decoder DD are received at one input terminal (IN-A), and the outputs of the seven lip-flops FF1 to FF9 are received at the other input terminal (IN-B).
) and receives the arbitrary program selection signal of the latch circuit 2 by using the output of the flip-flop FF16 for latching as a switching signal to switch and output one of the binary outputs, and the second switching circuit CG2 The second encoder ED2 receives the output of the latch circuit 2 and the output of the flip-flop 70 knobs FF1o to FF+s for latching the physique data selection signal of the latch circuit 2 and generates a binary output, and a physique data reset circuit 3B. . Then, a signal obtained by inverting the logic combinational circuit 3Al''i, the output of the NOR gate circuit NRo, the output of the flip-flop FFL6, and the "0" terminal output of the decimal decoder DD (inversion is performed by the inverter 1N2O) is made by three people. NOR gate circuit NR1 and the flip-flop F
A NOR gate circuit NRs in which the output of F16 and a comparison output of an exposure control signal generation circuit 6 to be described later are powered by two people; a NOR gate circuit NR2 in which both of these NOR gate circuits KR,1,NRs are powered by two people; The inverted signal of the comparison output of the exposure control signal generation circuit 6 (inverted by the inverter IN17) and the "9" signal of the decimal decoder DD
'' terminal output and a Nandts gate circuit ND7 which is powered by two people, the output of the NOR gate circuit NR2 is applied to the input terminal (IN) of the first counter CT1, and the output of the Nandts gate circuit ND17 is applied to the input terminal (IN) of the first counter CT1. It is applied to the clear terminal (CLR) of the counter CT1. or,
The physical data reset circuit 3B is the logical combinational circuit 3
The output of the Nant gate circuit r017 of A and the output of the clip-flop FF+6 are operated by two people, and the output of the gate circuit NR4 and the flip 70-tube FF for latching the reset position setting signal.

and a NOR gate circuit NRs whose output is powered by two people, and its output is commonly applied to the reset terminals of the 7-lip 70-tube FF10 to FF15 for latching the physique data selection signal.

" The display circuit 4 includes 17 Nant gate circuits ND.

~ND16, display lamps LO~L16 connected to the output side of each Nant gate circuit via a resistor, and a first pulse generator PG1.

Among the Nand gate circuits, the outputs of the "0" to "9" terminals of the decimal decoder DD are applied to each input terminal of one of the upper NAND gate circuits NDo to ND9, and the outputs of the "0" to "9" terminals of the decimal decoder DD are applied to each input terminal of the other one. The output of the first pulse generator PG1 is commonly applied, and each of the two input terminals of the other Nant gate circuits NI)+o to ND[ is supplied with the 7-lip 70-pin of the latch circuit 2. The outputs of the lamps FF+o to FF16 are respectively applied in common, and the power supply (+Vcc) pressure is commonly applied to the lamps LO to L+6. Furthermore, this lamp LO
~L16 is, for example, the switch SWo~5w of the operation panel 1
16, so that the operator can check the lighting status. Further, each of the lamps corresponds to each of the above-mentioned switches, and the lamp LO is for displaying the reset position setting, the lamps L1 to L9 are for displaying each shooting mode selection, the lamps L+o to L15 are for displaying the physique data setting, and the lamp Ij
+6 functions for displaying arbitrary program selection.

The X-ray exposure timing control circuit 5 includes a y lip 70g FF1y and a 7 lip flop FF1y on a J- terminal to which the output of the NOR gate circuit product 0 is applied to a clock terminal (CK).
A flip-flop FF1a is connected to J-, where the output of F17 and the output of the first mono multi-bh are commonly applied to the clock terminal (CK), and a signal obtained by inverting the output of the NOR gate circuit product 0 (inverted by the inverter IN1a) is applied to the clock terminal (CK). ) and a signal obtained by inverting the output of the FF16 (inverted by the inverter IN+p);
and the output of the flip-flop FF16 are powered by two people, a Nantes gate circuit ND20 that requires two people to output the outputs of both of these Nantes gate circuits NDI9°ND20, and the output of the gate circuit ND21; The output of the inverter lN2O that inverts the OJ terminal output of the decimal decoder DD and the matching circuit 1 described later.
It is constructed of a Nant gate circuit ND22 which outputs one output from three people, and a comparison output of an exposure control signal generation circuit 6, which will be described later, is applied to the reset terminal of the flip 70-tube FF18. .

The X-ray exposure control signal generation circuit 6 has X-ray exposure condition setting elements (X-ray exposure time, X-ray tube voltage, X-ray tube current) to which the binary output of the second encoder ED2 is input. ) Programmable memo for storing the set amount! J-PROM
5 to PROM 7 and the X-ray solar radiation timing generation circuit 5
A second pulse generator PG2 receives the output of the clip 70-tube FF+9 at its clock terminal (CK) at its clock terminal (CK), a second pulse generator PG2 whose control terminal -RCONT receives the output of the clip 70-tube FF19, and the output of the pulse generator PG2. a second counter CT2 which receives at its input terminal and generates a binary output, receives the binary output of the counter CT2 at one input terminal (IN-A), and receives the binary output of the PROM 5 at the other input terminal (IN-A). In B), the receiver compares the power of both men and outputs a match signal when the two match.
The coincidence output of the comparator C0M5 is applied to the reset terminal of the flip-flop FF19, the clear terminal of the second counter CT2, the gate circuit N& of the three logical combinational circuits of the control signal generation circuit 3, and the inverter INty. It is now applied. The output of the flip 70 tube FF19 becomes an X-ray exposure signal, and the binary outputs of PROM6 and PROM7 become an X-ray tube voltage setting signal and an X-ray tube current setting signal, respectively.

The position detection circuit 8 includes first to fourth potentiometers P that are linked to the movement of each position setting element of the bed mechanism (not shown).
M1 to PMa, and first to fourth amplifiers AMP1 to AIMP4 that amplify the outputs of the respective potentiometers. For example, among the respective potentiometers, the first potentiometer PM1 is configured to adjust the position of the bed to the up/down position. The second potentiometer PM2 is for detection, and the third potentiometer P is for detecting the longitudinal movement position of the top plate of the bed.
M5 is configured to detect the movement position of the top plate in the width direction, and a fourth potency meter PM4 is configured to detect the rolling position of the top plate.

The bed drive control signal generation circuit 7 converts each of the analog outputs of the first to fourth amplifiers AMP1 to AMP4 of the position detection circuit 8 into digital signals.
A/D converters ADC1 to A-DC4 and bimory PRO of the second encoder ED2 of the control signal generation circuit 3.
M+~PROM4 and the % converter ADCt-ADC4
Receive each binary output from one input terminal (IN-A), receive each binary output from the memory FROM1 to FROM4 from the other input terminal (IN-B), and compare both human input signal values (A, B). However, if the condition A>B, the output signal 11 is output from the inner output terminal, if the condition A<B, the output signal 11 is output from the [-j side output terminal, and if the condition A-H, the output signal 11 is output from the "0" output terminal. Comparators C0M1 to C0M that derive “
4. This comparator COMt~C
Each output of OMa is applied to a corresponding input terminal of the bed drive control circuit 9.

The matching circuit 11 includes a Nantes gate circuit ND24 that outputs "0" from each of the comparators C0M1 to C0M4 of the bed drive control signal generating circuit 7 with four inputs, and this gate circuit ND24.
The output of the inverter IN24 is connected to the input of the Nant gate circuit ND22 of the exposure timing generation circuit 5 and the clear terminal (C) of the first pulse generator PG1 of the display circuit 4.
LR). Further, the output of the Nant gate circuit ND24 is applied to the reset terminal of the seven lip-flop FFo for latching the reset position setting signal.

The operation of the device will be described below with reference to the timing charts shown in FIGS. 3(a) and 3(b). In the following operation explanation, we will distinguish between semi-automatic program sequential operation photography (the timing chart of which is shown in Figure 3 (a)) and arbitrary program operation photography (the timing chart of which is shown in Figure 3 (b)). This will be explained in order.

(1) Semi-automatic program sequential operation photography First, when the power is turned on, each logic circuit of the device is all reset by a system clear signal, which will not be described. Therefore, since the binary output of the first counter CT1 in the display circuit 4 is "0", the binary output of the decimal decoder DD in the control signal generation circuit 3 is "0".
"Output terminal is at output level "11", pulse generator P
Nant gate ND for Silumbu tribe by pulse signal from G1.

When the output level of LO becomes OI periodically, the indicator lamp Lot for setting the reset mode lights up (blinks) intermittently.

In this case, if the bed is already in the reset state (the subject can get on and off the bed), each position setting element of the bed (the up/down position of the bed, the longitudinal movement position of the top, the top width direction movement position, top plate rolling position] are all at the reset setting position, and the - number circuit 11 derives a coincidence signal, so the first pulse generator PG1 does not oscillate, and the lamp LO continues. On the other hand, if any of the position setting elements of the bed are not in the reset position when the power is turned on, the second encoder B in the control signal generation circuit 3
By the binary output value "0" of D2, each address 0 of PR14+ to PROM4 (memory for storing the setting amount of each position of the bed (P/G/F wall/saw 8F 1-shaku memo 1J)) (the setting amount of the reset position is stored. Each position setting element starts driving toward each reset position based on the output signal of each position setting amount corresponding to the reset position from these memories FROM1 to FROM4.

That is, the potentiometers PM1~ of the position detection circuit 8
Each position of each position setting element is detected by PM4, and the detection signal is converted into analog/analog signal via amplifiers AMP to AMP4.
It is converted into a digital signal by digital (A/D) converters ADCI to ADC4, and compared with the set amount of the reset position from each memory FROM1 to FROM4 in comparator C0M14. Comparators COMt to C0M4 compare the two human force signal values (A, B), and when A>B,
+” output terminal, if A<B, “-” output terminal, A, B
In this case, the output signal ``1'' is derived from the ``0'' output terminal.The output signals of the respective output terminals of the comparators C0M1 to C[Yes]■4 are introduced to the bed drive control circuit 9, and further, the output signal ``1'' is derived from the ``0'' output terminal. Each drive motor (not shown) of each position setting element introduced into the unit 10 starts forward or reverse rotation depending on the output level of the corresponding r+j r-j output terminal.

Then, after that, each position detection amount (g) and the setting amount◎
If they match (A, B), each comparator CGJ1
An output signal 11'' is derived from each "0" output terminal of ~C0M4, the corresponding drive motor is stopped, and each position setting element is set to its respective reset position.Furthermore, each position setting element is When all are set to the reset position, an output signal is obtained from the matching circuit 11,
Oscillation of the first pulse generator PG1 is stopped. At the same time, the coincidence signal is input to Xm@NDo of the irradiation timing control circuit 5, so the lamp La changes from a dimming light to a continuous light, indicating to the operator that the bed is in the reset state. Let me know.

Next, switch St; lV1 c- according to the body thickness of the subject.
5w12 is selected and pressed, and one of the switches S'w13 to 5Vv15 is selected and pressed depending on the height of the subject. After the selection and setting of the subject's physique data is completed, when the switch SW1 for selecting the first imaging mode is pressed, the count is input to the first color/reC'h via the Noah gates NRo, NR+, and NR2. Give the signal and change the binary output value of the counter 0'1 to "1" from rOJ.
Make it. The output of this counter C'h is the output of the first switching circuit C.
G1 to the decoder DD, and the output of the decoder DD transitions from the "0" output terminal to the "1" output terminal.

Therefore, the gate of NDo (Nando game) is closed and the lamp L for displaying the reset mode setting.

At the same time, the gate of the Nantes gate ND1 is opened and the lamp L1 for indicating the first photographing mode is turned on and off in response to the pulse signal from the first pulse generator PG1. In this case, even if the switch sw1 is pressed, the output of the decoder DD is output from the "0" terminal, so the gate of the Nantes gate ND22 of the X-ray radiation timing control circuit 5 is closed, so There is no exposure start signal.

On the other hand, at the same time as the switch sw1 is pressed, the second encoder ED2 outputs a binary value corresponding to the combination of the two types of closed condition setting switches. This binary output is a memo IJ PROM1 to PLl (0M4 and the setting amount of Xa exposure condition setting elements (X-ray exposure time, X-ray tube voltage, X-ray tube current) for storing the setting values of each position setting element of the bed. In addition to the address signals of the memory memo IJ PROM1 to PLlM7, the output values of the memories PROM+ to PRAM7 are calculated from the values set in the previous reset conditions (all X-ray exposure condition setting elements are "0"). In other words, the output values of the memories FROM+ to FROM4 correspond to the setting amounts of each position setting element of the bed in the first imaging mode based on the physique of the subject. Tonashi, memory PROM5~
The output values of the FROM 7 are set values for the exposure time, tube voltage, and tube current based on the physique of the subject and the first imaging mode.

Therefore, in the comparators C0M1 to CCM4, the potentiometers PM+ to PM4. Each position detection signal (8) corresponding to the reset position inputted via the amplifiers AMh to AMP4 and the % converters ADC1 to ADCa is compared with each set value 0. Accordingly, comparator C (Bf+~
Until then, C0M4 (at the reset position) A, -B
However, since the setting amount ◎ becomes the setting amount of the first shooting mode, a difference occurs between the two, and the matching signal (output signal of the 0 output terminal) that has been generated until now is no longer output, and the difference between the two A polarity signal of r+J r-J is derived in accordance with the relative difference state, and the drive motors of each position setting element (not shown) in the bed mechanism section 10 are rotated forward or reverse via the bed drive control circuit 9. Further, the outputs of the memories FROM6°FROM7 are sent to an X-ray exposure control circuit (not shown) as set values for tube voltage and tube current. Further, the output of the memory PROM5 becomes one input signal (setting value of the X-ray exposure time) of the comparator C0M5 (during the period t1 to t2).

When all the position setting elements of the bed have been set to the positions based on the first photographing mode, a matching signal is derived from the matching circuit 11, and the rung for displaying the first photographing mode is output as described above. The Id changes from a point-decreasing light to a continuous light,
The operator is informed that the setting of the first photographing mode has been completed and photographing is now possible (during period t2 to t3).

Then, when the first shooting mode selection switch Sw1 is pressed again, the Noah gate MFLo and the inverter lN15
゜Nant Gate ND19. ND21. 7 lip-flop FFHI in the exposure control signal generation circuit 6 via the ND22
Give an input signal to In this case, even if the switch y1 is pressed, the "0" output terminal of the decoder DD does not have an output "11".
Since the gate of NOR gate 1 is closed, no count input signal is input to the counter C'h. As a result, the 7-lip, 70-tube FF 19 is set, and an X-ray exposure signal is given to the X-ray exposure control circuit to start X-ray exposure. At the same time, the second pulse generator PG2 starts oscillating and the clock pulse is sent to the second counter CT2.
will be introduced in

After that, the output value (5) of counter CT2 is stored in the memory PROM.
When the output value ◎ of 5 matches (A, B), the comparator C0M5
A matching output signal is derived from the clipfrog.

Reset FF19 to stop X-ray exposure, and at the same time
Clear counter CT2 of (during period t3 to t4)
.

The -spread output signal is further divided into NOR gates NRs, N
A count input signal is given to the first counter CT1 via R2, and the count value of the counter CT1 is increased by one to "2".
”. As a result, the output of the decoder DD shifts from "1" to "2", the camera L1 becomes clear, and the lamp L2 for displaying the second photographing mode flashes on and off. At the same time, the output of the second encoder ED2 becomes a predetermined binary value based on the combination of the second imaging mode signal and the physique of the subject, and the memo! Each output value of J PROM1 to PROMy changes to the setting amount of the setting condition. Therefore, as described above, each position setting element and XM exposure condition setting element are respectively set for the second imaging mode, and the matching circuit 11 derives a matching signal again, so that the second imaging mode display rung L2 (changes from a blinking state to a continuous lighting state), which notifies the operator that the camera is ready for photography (time ts).

Next, when the second shooting mode selection switch SW2 is pressed, Noah gate NRo, inverter IN+ a, Nantes gate ND19, ND21 . The 7-rig, 70-tube FF 19 is set via the ND 22, and X-ray exposure is started. After that, when the set exposure time has elapsed, the comparator C0
The X-ray exposure ends when M5 derives a coincidence signal.

At the same time, the coincidence signal provides the first counter C'h Vc count input signal through NOR gate NR3, plate 2,
The output of the counter CT+ increases by one and becomes "3".

As a result, the output of the decoder DD shifts from "2" to "3", the lamp L2 goes out, the lamp L3 for displaying the third shooting mode starts blinking, and the setting drive of the third shooting mode starts. The start ceremony is held (during period t6 to t7).

The above operations are repeated to sequentially take pictures in the first to ninth picture modes, and when the picture taking in the ninth picture mode ends with a match signal from the comparator C0M5, the match signal is sent to the inverter IN17. Nantes Gate ND17
．． Furthermore, physique data reset circuit 3B Noah game) NR
4. Give a clear signal (or reset signal) to counter CT1 and flip-flops FF1o to FF15 via NRs. As a result, the lit lamp among the lamps Lto-L+s for displaying the setting conditions for body thickness and height goes out, and at the same time, the output of counter 0'1 becomes "0", so the output of decoder DD becomes "9". to "0".

Therefore, at the same time as the lamp L9 goes out, the reset mode display lamp LO blinks. At the same time, the binary output value of the second encoder ED2 is "0" and the memory FROM1~
FROMa is addressed to address 0, and each position setting element of the bed is automatically returned to the reset position (state in which the subject can get on and off) (after time t8).

(2) Shooting with arbitrary program operation First, press the switch 5w16 for arbitrary setting operation, set the clip frog FFL6, and switch to the first switching circuit CG.
+ from a state in which the A input (output of counter CT+) is the output signal to a state in which the B input (output of the first encoder ED1) is the output signal, and the second switching circuit CG
2 is switched from the state where the input (output of the decoder DD) is the output signal to the state where the B input (output of the flip 70 tubes FF1 to FF9) is the output signal, and further the NOR gate N'FL1 of the logic combinational circuit 3A is switched. ．． NR3, NR4
(and Nantes game) Close the gate of NIh9 and open the gate of Nantes gate ND20 of the exposure timing control circuit 5. Nantes gate ND16 for lamp drive at the same time
The display rung L16 for arbitrary setting operation is lit via the .

Next, if the bed is not in the reset state (when switching to arbitrary operation from the middle of the program item operation), press the reset position setting switch 5W (l to set the flip 70 knob FFo, 2 encoder EIh
, ED2 is forcibly set to the output value "0" and the bed is reset in the same manner as described above. When the bed is in a reset state, a coincidence signal is derived from the coincidence circuit 11,
Flip-flop FFo is reset and the first. The forced "0" output state of the second encoders ED1 and ED2 is released. Even if this release is performed, the bed remains in the reset state, so the first. The second encoder BIh, ED2 still has a "0" output value. Therefore, decoder DD
The output is led to the "0" output terminal, and the reset mode display lamp LO is lit continuously.

In this state, the switches 5W1o to 5W15 are then selectively pressed according to the body thickness and height of the subject, and the corresponding flip-flops FF10 to FF12 and FF+s are pressed.
Set any one of FF+s. (Lamp L1
The corresponding one among 0 to L15 lights up. ) Then, set the desired photographing mode by pressing any of the switches SW<-SW9. If the fifth shooting mode (
When NO5) is selected (press switch Sw5), flip-flop FF5 is set and the first encoder ED
The output of 1 becomes the binary value of "5", and the decoder DD outputs "5" through the first switching circuit CG1.
The rung L5 for displaying the shooting mode starts blinking. At the same time, the second encoder ED2 outputs binary values corresponding to the combinations of the three types of selection switches to the memories FROM1 to P.
Address ROM7 and set each position setting element of the bed and each X
The radiation exposure condition setting element is set to the corresponding setting amount (
Time 1+).

Thereafter, when the coincidence signal from the coincidence circuit 11 is derived, the lamp L5 changes from blinking to continuous lighting to notify the operator that the X-ray exposure is possible (time 1+).

Thereafter, by pressing the switch SWs again, an input signal is applied to the 7-lip-flop PF17 in the exposure timing control circuit 5 via NRo.

In addition, flip-flop FF17 and switch S
Since it was set when Ws was pressed for the first time, it is reset by the input signal again. Therefore, the output of the flip-flop FF+7 changes from "1" to rOJ υ, and at its fall, the next-stage flip-flop FF+a is set, and the output of the flip-flop FF+7 changes from "1" to rOJ.
7 lip-flop FF19 in the exposure control signal generation circuit 6 is set via the exposure control signal generating circuit 6. At the same time that the flip-flop FF19 is set and X-ray exposure is started, the second pulse generator PG2 oscillates and the second counter CT2 counts clock pulses. When the count value of the counter CT2 reaches the set value of the memory PROM5'7% etc., a coincidence signal is derived from the comparator C0M5, and the clip-flop F
F+9 is reset and X-ray exposure is stopped. Furthermore, the coincidence signal also resets the 7-lip-flop FF18 (period LSNt4).

Next, when the switch Svv9 is pressed to perform photography in the ninth photography mode, for example, the flip-flop FF+y is set via the Noah gate NRo, and at the rising edge of the set output, a pulse is instantaneously generated from the mono multivibrator claw 1. A reset pulse is applied to all flip-flops FF1 to FF9, and seven flip-flops FF5, which had been set up to that point, is reset. Also,
Since the output pulse width of the mono-multibiflator 1 is extremely short compared to the time during which the switch Sw9 is closed, the flip-flop FF9 is set with a delay of the pulse width time. Therefore, the output of the first encoder ED1 changes from "5" to "9", the lamp L5 for displaying the fifth shooting mode goes out, and almost at the same time, the lamp L9 for indicating the ninth shooting mode starts blinking. Light up. Also, the second encoder ED
The output of No. 2 is also output from the ninth shooting mode selection switch Sw9.
and switch history 10 to S'w15 for setting the physique data.
Each position setting element of the bed and the X-ray exposure condition setting element are respectively set in the same way as described above. As a result, the same operation as described above is performed, and after a coincidence signal is derived from the coincidence circuit 11 and the lamp L9 is turned on continuously, the switch SW9 is turned on again.
When is pressed, X-rays are emitted (period t5 to ta).

Therefore, in the case of arbitrary setting operation, after setting the subject's physique data, switch S'w for the desired imaging mode.
By pressing 1 to SW9 - times, you can issue the condition setting command for each shooting mode, and by pressing it again, you can set the conditions under those conditions.
Line photography is performed. Also, if you want to take pictures again under the same conditions while operating the program sequentially, switch 5w for arbitrary settings.
This can be done by pressing 16, then switch 5w1
If you press 6 again to return to the head-next operation, you can continue to perform the item-next operation again from the previous order. (At this time, the first counter CT1 stores the next step at the time of interruption.) Next, a device for realizing fully automatic program initial operation imaging will be described. In order to realize this, a part of the circuit shown in FIG. 2 may be changed or added to a circuit as shown in FIG. 4. That is, a fully automatic program selection switch 5W17 and an inverter IN2s connected to its output side are added to the operation panel 1,
In the latch circuit 2, there is a flip-flop FF21 which receives the output of the inverter IN2s at its clock (CK) terminal.
is added to the display circuit 4, and a lamp driving Nant gate circuit ND18 and a lamp L driven by the lamp driving circuit ND18 are added to the display circuit 4.
Add +7. In the X-ray exposure timing control circuit 5, an inverter IN23 for inverting the output of the additional flip-flop FF:+, an output of the additional flip 70-tube FF21, an output of the existing inverter IN19,
The output of the inverter lN2O of the control signal generation circuit 3 and -
A Nantes gate circuit ND25 that uses the coincidence signal from the multi-channel circuit 11 as a power source, a second monomultivibrator 1 that uses the output of the Nantes gate ND25 as a trigger signal, and a clock terminal (CK ), a flip-flop FF20 that is reset by the comparator of the X-ray exposure control signal generation circuit 6 is added, the existing Nant gate circuit ND22 is abolished, and an inverter IN24 is inserted in its place. Inverter IN24
Get the output from. The existing Nant gate circuits ND + q and ND2 o receive the output signal of the - number circuit 11 and the inverter IN of the control signal generation circuit 3, respectively.
2o and the output signal of the additional inverter IN25 are applied, and the output of the additional flip-flop FF20 is applied to the Nant gate circuit ND21 as an additional input signal.

Next, fully automatic program photography will be explained with reference to the timing chart of FIG.

In this fully automatic mode, operations related to reset mode setting from the time the power is turned on are the same as in the semi-automatic mode described above. Therefore, assuming that all position setting elements of the bed are at the reset position, the reset mode display lamp Lo is in a continuous lighting state.

Then, by pressing the switch SW+7 and setting the flip-flop FF21, the fully automatic operation display lamp JI7 is turned on via the Nantes gate ND+a, and the inverter: Close the gates NIh q and ND2 o,
At the same time, open the Nantes Gate ND25.

Next shop ■ ICA7sw12. S'w13~5w
By selectively pressing 15, each examiner's physique data is set, and their corresponding flip-flop F is set.
Set F+a~FF1s and display lamp L+o~L1
Light up the corresponding one in 5. If the first shooting mode selection switch S'w1 is then pressed, the switch signal is counted by the counter CT1 as in the semi-automatic case described above, and the counted value is changed from "0" to "1", so the reset state is entered. Setting of the first photographing mode starts from. At the same time, the display lamp LO goes out and the display lamp L1 starts blinking (time H).

Thereafter, when all position setting elements of the bed complete position setting based on the first imaging mode, the coincidence signal is transmitted to the Nant gate N of the X-ray exposure timing control circuit 5.
Trigger the monomultivibrator NIM2 via D 2 s with its falling edge. mono multivibrator hf
M2 derives a pulse signal of relatively long width from the time of input of its trigger signal.

The pulse width of this signal has a width corresponding to the time required for the mechanical vibrations of each positioning element of the bed to subside. When the output pulses of the mono-multivibrators N1 to N2 subsequently fall from 11 to 01, the 7 lip-flop FF20 is set at the falling timing, and the X-ray exposure timing is controlled via the Nant gate ND21 and the inverter hN24. Circuit 5 derives an output signal and provides a set input signal to flip-flop FF19. Accordingly, the 7 lip-flop F'F'19 is set to derive the X-ray exposure signal, and the clock pulse generator PG
2, and the counter cT2 starts counting time counting pulses. After that, when the count value of the counter CT2 reaches the set value derived from the memo IJ PROM5 for setting the Xm exposure time, a match signal is derived from the comparator A5, and the flip-flop FF19 is reset to start X-ray exposure. is stopped (period t3 to t). Also, this coincidence signal resets the counter CT2.
The count value of T1 is counted up from "1" to "2". This changes the output of the decoder DD from "1" to "2".
, the lamp L1 goes out, and the lamp L2 for displaying the second shooting mode starts blinking (period t4).
onwards). At the same time, the memories FROM1 to FROM7 are addressed via the second encoder BD2 with values based on the second photographing mode, and each setting element starts to be set to the second photographing mode condition. When all setting elements are set, a coincidence signal is again derived from the coincidence circuit 11, and as described above, after a predetermined period of time has elapsed, an output signal is derived from the X-ray exposure timing control circuit 5, and the flip 7
The zero knob FF19 is set and X-ray exposure starts automatically (time t6). The above series of operations are automatically repeated sequentially from the first to the ninth imaging modes, and in the final stage, the ninth imaging mode, the count value of the counter CT2 for counting the exposure time reaches the set value and the comparator When a match signal is derived from C0M5, since the Nant gate ND17 is open, the counter 0'1 is reset and the output of the decoder DD becomes "9".
” to “0”. Therefore, when the lamp L9 goes out, the reset mode display lamp LO lights up, and each position setting element of the bed returns to the reset position. At the same time, the coincidence signal is the Noah game of the physique data reset circuit 3B)
Flip-flop FF+c-F via NR4 and NRs
Reset F+s and turn on the lamp L+ for displaying physique condition settings.
Reset o~L's.

In addition, when applying an automatic exposure control function based on f1, tie &, in place of the coincidence signal of the comparator C f5, All you need is a line cutoff signal.

Therefore, in this case, the memo IJ PR for setting the exposure time
ONfs.

The clock pulse generator PG2, color/return Cr2, and comparator C0M5 for time measurement become unnecessary. Further, a changeover switch (and a changeover indicator) is provided, and the comparator C
A gate circuit may be provided to gate control the 0M5 coincidence signal and the phototimer output signal using a switching signal, so that both functions can be selectively applied.

Further, in the above embodiments, a digital hard logic circuit is used, but an analog hard logic circuit or a logic circuit using a microcomputer may be used.

It goes without saying that the present invention is not limited to the embodiments described above, and can be implemented with various modifications without changing the gist thereof.

According to the device of the present invention described in detail above, at the same time as the shooting mode is selected, positioning corresponding to the shooting mode is automatically performed, so the time for shooting positioning can be significantly shortened, and the positioning The use of fluoroscopy for initial positioning can be kept to a minimum or even unnecessary, making it possible to reduce the radiation dose to the patient to an extremely low level. Furthermore, as mentioned above, it is possible to use semi-automatic program shooting and optional program shooting, and it is possible to perform fully automatic program shooting by simply adding a small amount of circuitry to the device, making it an extremely easy-to-use device. can be provided. Therefore, it is an optimal device to be used, for example, as a group medical examination device in which the order of imaging modes is formulated. Also, conventional tube voltage and tube current.

Compared to the case where each exposure time was set independently and based on the operator's experience, the use of the device of the present invention has the advantage that it is possible to always obtain the optimal X-ray photograph for diagnosis. .

[Brief explanation of the drawing]

Fig. 1 is a system block diagram showing an embodiment of the schematic configuration of the device of the present invention, Fig. 2 is a circuit diagram showing a specific embodiment thereof, and Fig. 3 (a) and (b) are diagrams explaining its operation. FIG. 4 is a partial circuit diagram for explaining a modification of the device of the present invention, and FIG. 5 is a timing chart for explaining its operation. 1...Operation panel, 2-...Latch circuit, 3
...Control signal generation circuit, 4-...Display circuit, 5
- X-ray exposure timing control circuit, 5. ,, X-ray exposure control signal generation circuit, 7... Bed, drive control signal generation circuit, 8... Position detection circuit, 9... Bed drive control circuit, 10... Bed mechanism section, 11... Matching circuit, SWo~SW+ y...Push button switch. Agent Patent Attorney Noriyuki Chika

Claims (1)

[Claims] a selector that selects various imaging modes and combinations of various physique data of the subject, etc., and outputs information corresponding to these;
a setting signal generating means for generating an imaging condition setting signal and an imaging positioning condition setting signal for various position setting elements of the bed based on output information from the selector; and an X-ray exposure signal based on the imaging condition setting signal. , X-ray tube voltage setting signal and
an X-ray exposure control signal generating means that generates a ray tube current setting signal; bed drive control signal generating means for generating a control signal for positioning the bed and a positioning end signal in accordance with the imaging mode; and X-ray exposure timing based on the relationship between the imaging mode selection signal and the positioning end signal. an X-ray exposure timing control means for outputting a control signal, and controls the generation timing of the X-ray exposure signal of the X-ray exposure control signal generation means based on the output of the X-ray exposure timing control means. An X-ray diagnostic device characterized by: