KR20100027808A - Apparatus and method for detection of x-ray trigger - Google Patents

Abstract

PURPOSE: An X-ray trigger detection apparatus and method, which use a synchronizing signal of a sensor panel after converting into digital is provided to process a value of the sensing signal by operating a panel in the investigation of X-ray. CONSTITUTION: An X-ray trigger detection apparatus comprises a trigger signal detection unit(110), a driving control section(120), and a panel driving part(130). If the X-ray signal is applied, the trigger signal detection unit detects the trigger signal by using a capacitor(C). A driving control section is performed the controlling execution by using the trigger signal which detect from the trigger signal detection unit. The panel driving part runs the sensor panel the driving control section.

Description

Apparatus and method for detection of X-ray trigger}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray detector, and more particularly, to detect and convert a shot signal of an X-ray in real time to digital, and to be used as a synchronization signal of a sensor panel and an X-ray trigger detection device, It is about a method.

In general, an X-ray detection apparatus is a device used to detect and image X-rays transmitted through a human body or an object.

1 is a block diagram of a conventional X-ray detection apparatus.

Thus, the X-ray detecting apparatus includes a vertical shift register 1, a digital x-ray detecting apparatus 2, a multiplexer 3, an analog-digital converter 9, an image memory 5 for correction data, an image processing apparatus 6, a display apparatus. (7) and a memory device (8).

FIG. 2 is a circuit diagram of a digital x-ray detecting apparatus using a TFT in FIG. 1 and a peripheral block thereof.

In the digital X-ray detection apparatus 2, the photoelectric conversion unit 11 converts charges, the charge storage unit 12 accumulates charges, the protective TFT 13 performs a compensation function, and the transfer TFT 14. ) Reads and transfers the charge.

The photoelectric conversion unit 11 converts incident light or incident X-rays into electric charges, generates charges according to incident light or incident X-rays, and displays them as capacitors in an electrical equivalent circuit. The photoelectric conversion section 11 is composed of selenium or the like which directly converts X-rays into electric charges, and is configured to apply a voltage of several KV to both ends of the selenium film.

On the other hand, a transfer TFT 14 is connected to the charge storage section 12, and the transfer TFT 14 reads through the signal line 17 reading the charge accumulated by the charge storage section 12 via a read amplifier (Read amplifier). It serves as a read switch provided to the amplifier (18).

In the transfer TFT 14, the gate control signal is inputted to the gate terminal G from the vertical shift register 1 after the irradiation of the X-ray through the vertical select line 16, so that the drain terminal D and the source terminal S are turned on. To act as a switch.

After the irradiation of the X-rays, the electric charges having information on the X-ray accumulated in each pixel are transmitted to the external lead amplifier 18 via the transmission TFT 14.

The vertical selection line 16 is connected to the gate terminal G of the transfer TFT 14 in a row corresponding to its vertical selection line. Each read amplifier 18 is connected to the drain terminal D of the transfer TFT 14 corresponding to its lead amplifier 18, and reads the charge of the corresponding transfer TFT 14 and outputs it to the multiplexer 3. do.

Moreover, it is comprised by the integrated amplifier which connected the capacitor | condenser 18b between the inverting input terminal and the output terminal of the lead amplifier 18. As shown in FIG. The multiplexer 3 converts the parallel output from each read amplifier 18 into a serial output and sends it to the analog-to-digital converter 9.

The digital x-ray detecting apparatus 2 configured as described above is mounted on the x-ray detecting apparatus and used for medical equipment or building equipment that monitors the captured image of the x-ray and can be confirmed through the display device 7.

However, the prior art uses a method of driving the panel after the X-ray irradiation is finished, rather than driving the panel during the X-ray irradiation. That is, the conventional TFT type X-ray detecting apparatus has a capacitor (C) in the panel itself, and detects the X-ray signal in real time because the capacitor (C) detects a signal after accumulating charge after the X-ray is irradiated. There was a limit.

In addition, the prior art did not detect a trigger signal from the shot signal of the X-ray.

Accordingly, the present invention has been proposed to solve the above-mentioned conventional problems, and an object of the present invention is to detect the X-ray shot signal in real time and convert it to digital and then detect the X-ray trigger which can be used as a synchronization signal of the sensor panel. An apparatus and a method thereof are provided.

3 is a block diagram of an x-ray trigger detection apparatus according to an embodiment of the present invention.

As shown therein, a trigger signal detector 110 for detecting a trigger signal using a capacitor C when an X-ray shot signal is applied; A driving controller 120 which performs driving control by using the trigger signal detected by the trigger signal detection unit 110; And a panel driver 130 for driving the sensor panel 200 under the control of the driving controller 120.

The trigger signal detector 110 includes: an analog detector 111 for detecting an analog trigger signal using a capacitor C in an X-ray source; And an analog-digital converter 112 for converting the analog trigger signal detected by the analog detector 111 into a digital signal.

4 is a detailed circuit diagram illustrating a first embodiment of the trigger signal detector in FIG. 3, FIG. 5 is a detailed circuit diagram illustrating a second embodiment of the trigger signal detector in FIG. 3, and FIG. 6 is a trigger signal detector in FIG. 3. Detailed circuit diagram showing the third embodiment.

As shown therein, the analog detector 111 includes a capacitor C, and detects a trigger signal by connecting one or more of a resistor R or an inductor L in series or in parallel. .

In addition, the analog-to-digital converter 112 is characterized by using a transistor transistor transistor (TTL) element.

In addition, the analog-to-digital converter 112 is characterized by using a negative logic element (NOT gate).

The driving controller 120 is configured as a field programmable gate array (FPGA) 121.

The panel driver 130 includes: a switch 131 for turning on or off an operation of the panel driver 130 under the control of the drive controller 120; An operational amplifier unit 132 operable to amplify a trigger signal by operating in accordance with an on or off of the switch 131; And a field effect transistor (FET) 133 which is operated by the operational amplifier 132 and outputs a driving signal to the sensor panel 200.

FIG. 7 is a waveform diagram illustrating an example of detecting a trigger signal when an x-ray shot signal is generated in the x-ray trigger detection apparatus of FIG. 3.

8 is a flowchart illustrating a method of detecting an X-ray trigger according to an embodiment of the present invention.

As shown therein, first steps ST1 and ST2 of detecting an analog trigger signal using a capacitor C when an X-ray shot signal is applied; A second step ST3 for converting the analog trigger signal detected in the first step into a digital signal; And a third step ST4 of controlling the sensor panel 200 by using the converted digital signal.

The X-ray trigger detection apparatus and method according to the present invention has an effect that can be used as a synchronization signal of the sensor panel after detecting and converting the shot signal of the X-ray in real time to digital.

In addition, by synchronizing each circuit, the panel can be driven in real time during X-ray irradiation, and the processing speed of information can be improved by receiving and processing the value of the detection signal in real time.

Exemplary embodiments of the X-ray trigger detection apparatus and method according to the present invention configured as described above will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed descriptions of well-known functions or configurations will be omitted if it is determined that the detailed description of the present invention may unnecessarily obscure the subject matter of the present invention. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to intention or precedent of a user or an operator, and thus, the meaning of each term should be interpreted based on the contents throughout the present specification. will be.

First, the present invention is to detect the shot signal of the X-ray in real time and convert it to digital, and then utilize it as a synchronization signal of the sensor panel. Therefore, it is to sense the shot signal moment in the X-ray source (trigger signal detection) to synchronize the signals of the panel driver 130 and the signal converter (not shown). The signal converter is a means for implementing an image using the detected X-ray signal.

3 is a block diagram of an x-ray trigger detection apparatus according to an embodiment of the present invention.

The trigger signal detector 110 detects a trigger signal using the capacitor C when the X-ray shot signal is applied. The trigger signal detector 110 may be configured of an analog detector 111 and an analog-digital converter 112.

Therefore, the analog detector 111 of the trigger signal detector 110 detects an analog trigger signal using the capacitor C in the X-ray source and transmits the analog trigger signal to the analog-digital converter 112.

In addition, the analog-to-digital converter 112 of the trigger signal detector 110 converts the analog trigger signal detected by the analog detector 111 into a digital signal and transmits the analog signal to the driving controller 120. In this case, the analog-to-digital converter 112 may be configured using a TTL device. In addition, the analog-to-digital converter 112 may be configured using a negative logic element (NOT gate). Here, the 74LS04 device may be used as the negative logic device. The negative logic element converts an analog signal into a digital signal by combining two, four, six, and the like.

The drive controller 120 performs drive control on the panel driver 130 using the trigger signal detected by the trigger signal detector 110. The drive control unit 120 may be configured as an FPGA 121.

In addition, the panel driver 130 drives the sensor panel 200 under the control of the driving controller 120. The panel driver 130 may include a switch 131, an operational amplifier 132, and a FET 133.

Thus, the switch 131 in the panel driver 130 may be configured as a transistor by turning on or off the operation of the panel driver 130 under the control of the drive controller 120 that may be configured as the FPGA 121. .

In addition, the operational amplifier 132 in the panel driver 130 operates according to the on or off of the switch 131 to amplify the trigger signal and transmits the trigger signal to the FET 133.

In addition, in the panel driver 130, the FET 133 is operated by the operational amplifier 132 and outputs a driving signal for the sensor panel 200.

4 is a detailed circuit diagram illustrating a first embodiment of the trigger signal detector in FIG. 3, FIG. 5 is a detailed circuit diagram illustrating a second embodiment of the trigger signal detector in FIG. 3, and FIG. 6 is a trigger signal detector in FIG. 3. Detailed circuit diagram showing the third embodiment.

As shown in FIGS. 4 to 6, the analog detector 111 includes a capacitor C and detects a trigger signal by connecting one or more of a resistor R or an inductor L in series or in parallel.

First, in the case of FIG. 4, when the X-ray shot signal is input, the analog C is connected through a capacitor C, a resistor R connected in parallel with the capacitor C, and an inductor L connected in series with the capacitor C / resistor R. To detect the trigger signal. In addition, by converting into a digital signal by using two negative logic elements of the TTL element, it is transmitted to the driving control unit 120 and the panel driving unit 130, and acts as a trigger signal of the signal conversion unit (not shown) Will be performed.

In addition, in the case of FIG. 5, when the X-ray shot signal is received, the analog trigger signal is detected through the capacitor C and the resistor R connected in parallel with the capacitor C. In addition, by converting into a digital signal by using two negative logic elements of the TTL element, it is transmitted to the driving control unit 120 and the panel driving unit 130, and acts as a trigger signal of the signal conversion unit (not shown) Will be performed.

6, when the X-ray shot signal is input, the analog trigger signal is detected through the resistor R and a capacitor C connected in parallel with the resistor R. In addition, by converting into a digital signal by using two negative logic elements of the TTL element, it is transmitted to the driving control unit 120 and the panel driving unit 130, and acts as a trigger signal of the signal conversion unit (not shown) Will be performed.

In FIGS. 4 to 6, only examples of the three cases are shown, but a configuration including a capacitor C and connecting at least one of the resistor R or the inductor L in series or in parallel is possible. .

FIG. 7 is a waveform diagram illustrating an example of detecting a trigger signal when an x-ray shot signal is generated in the x-ray trigger detection apparatus of FIG. 3.

In FIG. 7, the waveform of (a) is an X-ray shot signal, and (b) shows a final trigger signal. Therefore, the trigger signal can be detected and synchronized in real time when the X-ray shot signal occurs. The present invention includes a capacitor (C), it can be seen that there is an advantage in reliability and cost by detecting the signal using the resistor (R), or inductor (L) or resistor (R) and inductor (L). .

8 is a flowchart illustrating a method of detecting an X-ray trigger according to an embodiment of the present invention.

First, when an X-ray shot signal is applied (ST1), an analog trigger signal is detected using the capacitor C (ST2).

The detected analog trigger signal is converted into a digital signal (ST3).

Then, the control of the sensor panel 200 may be performed in real time using the converted digital signal, and synchronization with a signal converter (not shown) for image conversion may be performed (ST4).

As described above, the present invention detects the shot signal of the X-ray in real time, converts it to digital, and utilizes it as a synchronization signal of the sensor panel.

Although the present invention has been described in more detail with reference to the examples, the present invention is not necessarily limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

1 is a block diagram of a conventional X-ray detection apparatus.

FIG. 2 is a circuit diagram of a digital x-ray detecting apparatus using a TFT in FIG. 1 and a peripheral block thereof.

3 is a block diagram of an x-ray trigger detection apparatus according to an embodiment of the present invention.

4 is a detailed circuit diagram illustrating a first embodiment of the trigger signal detector in FIG. 3.

FIG. 5 is a detailed circuit diagram illustrating a second embodiment of the trigger signal detector in FIG. 3.

FIG. 6 is a detailed circuit diagram illustrating a third embodiment of the trigger signal detector in FIG. 3.

FIG. 7 is a waveform diagram illustrating an example of detecting a trigger signal when an x-ray shot signal is generated in the x-ray trigger detection apparatus of FIG. 3.

8 is a flowchart illustrating a method of detecting an X-ray trigger according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100: X-ray trigger detection device

110: trigger signal detection unit

111: analog signal detection unit

C: Capacitor

R: resistance

L: Inductor

112: analog to digital converter

120: drive control unit

121: FPGA

130: panel drive unit

131: switch

132: operational amplifier

133: FET

200: sensor panel

Claims (8)

A trigger signal detector for detecting a trigger signal using a capacitor when an X-ray shot signal is applied; A driving controller which performs driving control by using the trigger signal detected by the trigger signal detector; A panel driver configured to drive a sensor panel according to the control of the driving controller; X-ray trigger detection device comprising a. The method according to claim 1, The trigger signal detector, An analog detector which detects an analog trigger signal using a capacitor in the X-ray source; An analog-digital converter for converting the analog trigger signal detected by the analog detector into a digital signal; X-ray trigger detection device comprising a. The method according to claim 2, The analog detection unit, An x-ray trigger detection device comprising a capacitor, and detects a trigger signal by connecting at least one of a resistor or an inductor in series or in parallel. The method according to claim 2, The analog to digital converter, An x-ray trigger detection device, characterized in that configured using a TTL element. The method according to claim 4, The analog to digital converter, An x-ray trigger detection device, characterized in that configured using a negative logic element. The method according to any one of claims 1 to 5, The drive control unit, X-ray trigger detection device characterized in that the FPGA. The method according to any one of claims 1 to 5, The panel driver, A switch for turning on or off an operation of the panel driver according to the control of the driving controller; An operational amplification unit configured to amplify a trigger signal by operating according to the on or off of the switch; An FET operated by the operational amplifier and outputting a driving signal for the sensor panel; X-ray trigger detection device comprising a. Detecting an analog trigger signal using a capacitor when an X-ray shot signal is applied; A second step of converting the analog trigger signal detected in the first step into a digital signal; Performing a control on a sensor panel using the converted digital signal; X-ray trigger detection method comprising the step of performing.

Images