JPS6337599A - X-ray condition display device - Google Patents

Abstract

PURPOSE:To simplify the configuration by digitally displaying both the preset value and measured value of X-ray conditions as digital data on a digital indicator and selectively displaying the preset value and measured value in time division on one unit or one set of indicator. CONSTITUTION:The tube current measured by a tube current measuring circuit 1 is A/D converted by an A/D converter 2. Among the data from the A/D converter 2, the data corresponding to the 10<0> digit are fed to a latch circuit 5a, the data corresponding to the 10<-1> digit are fed to a latch circuit 5b respectively for temporary storage, then they are fed to a data selector 5c and fed to B0-B3 inputs of a data selector 5d in time division. On the other hand, the tube current preset value set by a tube current setter 4 is converted into the BCD code by an encoder 3 and is fed to A0-A3 inputs of the data selector 5d. The preset value/measured value transfer signal SB is connected to the address input A4 of ROM 5e and the select input S of the data selector 5d, and the display data are outputted from ROM 5e. Accordingly, the configuration is simplified and the cost can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an X-ray condition display device in an X-ray apparatus.

[Background of the Invention] Conventionally, this type of device has an inexpensive configuration that efficiently displays preset values (setting values) of X-ray conditions such as tube current, tube voltage, and imaging time, and a device that efficiently displays preset values (setting values) of X-ray conditions such as tube current, tube voltage, and imaging time, and X when
There was one that displayed the radiation output (actually measured value under X-ray conditions) with a meter.

However, there is nothing that can display both the set values of the X-ray conditions and the actual measured values of the X-ray conditions.
It was inconvenient that the actual irradiation dose to the subject had to be determined using other, more difficult methods. To deal with this, it is possible to provide a circuit and meter for displaying the set value and a circuit and meter for displaying the actual measured value, but such a method requires a complicated configuration and is also expensive. Attaching both meters would make the operation panel cluttered, and it would be difficult to read the meter readings, which would be impractical.

[Object of the Invention] The present invention has been made in view of the above-mentioned circumstances, and is capable of digitally displaying the set values and actual measured values of X-ray conditions, and has a simplified configuration, and solves the above-mentioned problems. It is an object of the present invention to provide an X-ray condition display device that can eliminate points.

[Summary of the Invention: The device of the present invention is configured to display both set values and actual measured values of X-ray conditions, but these values are treated as digital data (simply referred to as data) and displayed numerically on a digital display. The display should be one or one.
The set value and the measured value are switched and displayed in a time-division manner to achieve the above-mentioned purpose.

[Embodiments of the Invention] The present invention will be described in detail below with reference to the drawings. FIG. 1 is a circuit diagram showing an embodiment of the X-ray condition display device according to the present invention. In the figure, 1 is a tube current measuring circuit for measuring the tube current of the xI & tube (not shown), and 2 is a circuit diagram for actually measuring the X-ray conditions. data output circuit,
Here, the actual measurement value of the tube current from the tube current measurement circuit 1 is
This is an A/D converter that performs the conversion. 3 is an X-ray condition setting data output circuit that outputs data according to the X-ray condition setting value; here, it outputs coded data of the tube current value (tube current setting value) set by the tube current setting device 4; It is an encoder.

5 is a display data selection output circuit, into which each output data from the A/D converter 2 and encoder 3 is input;
Either data for displaying actual measured values based on the output data from the converter 2 or data for displaying set values based on the output data from the encoder 3 is selectively output. 6 is a display circuit into which display data from the display data selection output circuit 5 is input, and when the input data is data for displaying an actual value, it displays the actual measured value of the tube current, and when it is data for displaying a set value, it displays the actual value of the tube current; The tube current setting value is set to a common (same)
Numbers are displayed on the digital display 7.

Here, the device of the present invention is used for a fluoroscopic imaging device, and in that case,
Tube current is 0.1 to 4. (It is about 1mA, and therefore the tube current can be displayed with two digits, 10@ place and 10-1 place. Also, each data is treated as 4-bit data, and in order to share the display 7, In other words, the display data selection output circuit 5 is configured by a latch circuit 5atSb, a data selector 5t't5+1, and a ROM 5°, and the display circuit 6 is configured by an inverter 6a and a 7-segment driver 6b+60 to perform digital display. The device 7 is a 7 segment display 7a+7
b, respectively. Note that SA is 10°/
10-1 switching signal, SB is a set value/actual value switching signal. The switching signal SB is a signal from a display data output switching means (not shown), and the switching means outputs actual measurement value display data from the start of X-ray irradiation until a certain period of time after the end of the X-ray irradiation. At other times, the set value display data is output from the display data selection output circuit 5.

Next, the operation of the apparatus of the present invention having the above configuration will be explained. First, the tube current measured by the tube current measuring circuit 1 (usually a voltage signal Vo proportional to the tube current) is applied to the A/D converter 2,
Perform A/D conversion. Data from A/D converter 2 (BC
D code), the data corresponding to the 10' position (10@ position data) is temporarily stored in the latch circuit v&5a, and the data corresponding to the 10-1 position (10-1 position data) is temporarily stored in the latch circuit 5b. It is given to the data selector 5c. The data selector 5° time-divides the 10'' data and the 10-1 data based on the IQ'/10-1 switching signal SA and sends it to the B (B, .about.B,) input of the data selector 5d.

On the other hand, the tube current setting value set by the tube current setting device 4 is converted to a BCD code by the encoder 3, and the data selector 5
d is given to the A (A, ~As) input. here,
The output Y (Y, ~Y)) of the data selector 5d is a ROM
5. The set value/actual value switching signal SB is connected to the address input A4 of the ROM5e.
and the select input S of the data selector 5d, and display data is output from the ROM so as follows. Namely.

When the switching signal SB is a set value display command, the data selector 5d outputs data (output data of the encoder 3) corresponding to the tube current set value.

This data is address data of the ROM 5e, and the data read at that address is outputted from the output ○ (00 to O,) of the ROM 5e as set value display data. Further, when the switching signal SB is an actual measurement value display command, the data selector 5d outputs data (output data of the data selector 5e) corresponding to the actual measurement value of the tube current. This data is also ROM5e address A, ~A
, but at this time, the input data is made to become the output data as it is by the command to display the actual measured value to the address A, and the input data is inputted to the ROM 5. The output O is outputted as actual measurement value display data.

ROM5. The display data from is sent to the 7 segment drivers 6b*6e, and the 7 segment display 7a.

7b is converted into a lighting signal, and as a result, a number representing the tube current setting value or actual measurement value is displayed on the 7-segment display 7atVb. As mentioned above, 10
Since the @ place data and the 10-1 place data are sent in a time-sharing manner, the actual value display data is also output from the ROM 5e in a time-sharing manner, and this actual value display data is sent to the drivers 6bt and 6e at the same time. Become. However, in this case, the 10'/10-" switching signal SA is
+ 6c (in this case, 6b) is sent as is, and the other (in this case, se) is sent through the inverter 6a, and the switching cycle is set in consideration of the afterimage time, so the actual measured value of the tube current said display 7ay Tb without any problem.
will be displayed.

It goes without saying that the display data selection output circuit s5, the display circuit 6, the digital display 7, etc. are not limited to the configurations of the above-mentioned embodiments. If the configuration is
The set value and the measured value can be easily switched and displayed on the common display 7 using a 1-bit signal (switching signal SB). Further, in the above embodiment, the ROM 5111 is configured only as a table memory for setting values, and this is configured as a table memory for setting values.
It may also be provided on the front side of the R.
Instead of placing the OM5e on the display data selection output circuit 5 side,
It may be provided on the X-ray condition setting data output circuit 3 side.

Further, the digital display 7 in the display circuit 6 does not necessarily need to be placed on the operation panel, but may be provided inside the data printer so as to be used as a display output means of the data printer.

Further, in the above embodiment, the X-ray condition to be displayed is the tube current, but the display is not limited to this, and the tube voltage, the imaging time, or a combination thereof may also be displayed. When displaying the actual measurement value of the imaging time, use a time counter or the like as the X-ray condition actual measurement data output circuit 2, and temporarily store the count value from the start of X-ray irradiation to the end with a latch circuit. good.

[Effects of the Invention] As described above, the present invention treats the xa condition setting values and the actual measured values as digital data and displays them numerically on a digital display.
The set value and the measured value are switched and displayed in a time-division manner, so that the set value and the measured value can be easily compared and contrasted. Therefore, it is easy to manage the accuracy of the device and understand the actual X-ray irradiation dose to the subject, and the configuration is simple and costs can be reduced.Moreover, the display value is easy to understand without cluttering the operation panel. It has the effect of being easy to use.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of an X-ray condition display device according to the present invention. 1... Tube current measurement circuit, 2... A/D converter, 3...
...Encoder, 4...Tube current setting device, 5...Data selection output circuit for display, 6...Display circuit, 7...Digital display.

Claims (1)

[Claims] In an X-ray apparatus, an X-ray condition setting data output circuit outputs data according to a set value of X-ray conditions, an X-ray condition actual measurement data output circuit outputs data according to an actual measured value of X-ray conditions, and a display data selection output circuit that selectively outputs either actual measurement value display data based on the output data of the actual measurement data output circuit and set value display data based on the output data of the setting data output circuit; Display data output for outputting the actual measurement value display data from the start of X-ray irradiation until a certain time elapses after the end, and the set value display data at other times from the display data selection output circuit. a switching means, and a display circuit into which display data from the display data selection output circuit is input and which displays the X-ray condition set value or the X-ray condition actual value on a common digital display in accordance with the input data. An X-ray condition display device comprising: