Signal conditioning device for flat panel detector and CT (Computed Tomography)

Abstract

The invention provides a signal conditioning device for a flat panel detector and a CT (Computed Tomography). The device comprises a main processor and an interface circuit, wherein the interface circuit comprises a slip ring interface circuit and a flat panel detector interface circuit; the slip ring interface circuit is used for sending image data and instruction data required by the slip ring and receiving the instruction data and trigger data transmitted by the slip ring; and the flat panel detector interface circuit is used for receiving the image data and the instruction data transmitted by the flat panel detector and sending the instruction data which can be received by the flat panel detector. According to the signal conditioning device for the flat panel detector and the CT, the problems that the development period of a special detector is long, the cost is high, and the application object is single can be solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical detection instruments, and particularly relates to a signal conditioning device for a flat panel detector and a CT. Background Art

[0002] In a CT device, both the CT detector data acquisition system and the radiation source are fixed on a slip ring. During normal operation, the radiation source continuously emits X-rays. Image data acquisition of the detector can be controlled by an instruction or by an external trigger signal, and then the acquired image data is sent to a computer. Since the amount of image data is large, high bandwidth support is required, and generally it is transmitted by radio frequency. Considering factors such as cost, the radio frequency transmission on the slip ring is often unidirectional, that is, the image data can only be transmitted from the CT detector end to the computer through the slip ring. However, a channel is also required between the computer and the detector to enable the transmission of instruction data, including the configuration of detector parameters and the reading of relevant states, etc. The communication rate requirement is not high, but bidirectional data transmission is required, which can be achieved through the signal ring on the slip ring.

[0003] See Figure 1 , the image data transmission from the CT detector data acquisition system to the slip ring is usually an optical fiber signal, and the transmission from the slip ring to the computer is usually an optical fiber signal;

[0004] The instruction data transmission from the CT detector data acquisition system to the slip ring is usually a serial port signal

[0005] The trigger signal from the slip ring to the CT detector data acquisition system is usually a differential signal.

[0006] See Figure 2 , flat panel detectors are widely used in the fields of medical and industrial non-destructive testing, etc. The two-way transmission of image and instruction data between the computer and the detector is often through an Ethernet port or an optical fiber. During normal operation, the radiation source emits X-rays under the control of the computer. Image data acquisition of the detector can be controlled by an instruction or by an external trigger signal, and then the acquired image data is sent to the computer.

[0007] The transmission of image and instruction data between the flat panel detector and the computer is usually an optical fiber cable or a network cable.

[0008] The trigger signal given by the high-voltage generator to the flat panel detector is usually a single-ended level signal.

[0009] In emerging applications, flat panel detectors are gradually being used in CT systems using slip rings. The flat panel detector is fixed on the slip ring, but due to the incompatibility of their interfaces, the signals of common flat panel detectors cannot be directly docked with the CT system, and the cost of redesigning the flat panel detector with a corresponding interface is high and the time cycle is long.

[0010] The processing capacity of the flat panel detector is limited, and it usually acquires and outputs the original image. Moreover, the pixels of the flat panel detector are small and the number of pixels is large, which places extremely high requirements on the system processor. Summary of the Invention

[0011] The purpose of the present invention is to provide a signal conditioning device for a flat panel detector and a CT, which can solve the problems of long development cycle, high cost, and single application object of a dedicated detector.

[0012] To achieve the above purpose, the present invention provides a signal conditioning device for a flat panel detector and a CT, which is arranged between the flat panel detector and the slip ring and includes:

[0013] A main processor and an interface circuit, and the interface circuit includes: a slip ring interface circuit and a flat panel detector interface circuit;

[0014] The slip ring interface circuit is used to send the image data and command data required by the slip ring, and at the same time, receive the command data and trigger data transmitted by the slip ring;

[0015] The flat panel detector interface circuit is used to receive the image data and command data transmitted by the flat panel detector and send the command data that the flat panel detector can receive.

[0016] In some embodiments, the slip ring interface circuit includes: an image data transmission interface circuit, a command data transmission interface circuit, a trigger interface circuit, and a power supply interface circuit.

[0017] In some embodiments, the image data transmission interface circuit is respectively connected to the image data transmission interface of the slip ring and the main processing circuit of the signal conditioning device, and is used to send the recognized and parsed flat panel detector image data to the image data transmission interface of the slip ring.

[0018] In some embodiments, the command data transmission interface circuit is respectively connected to the command data transmission interface of the slip ring and the main processing circuit of the signal conditioning device, and is used to receive the command data sent by the slip ring or send the command data required by the slip ring.

[0019] In some embodiments, the trigger interface circuit is respectively connected to the trigger interface of the slip ring and the main processing circuit of the signal conditioning device, and is used to receive the trigger command sent by the slip ring.

[0020] In some embodiments, the power supply interface circuit is connected to the power supply interface of the slip ring and is used to supply power to the signal conditioning device.

[0021] In some embodiments, the flat panel detector interface circuit includes: a data transmission interface circuit, a trigger interface circuit, and a power supply interface circuit.

[0022] In some embodiments, the data transmission interface circuit is respectively connected to the data transmission interface of the flat panel detector and the main processing circuit of the signal conditioning device, and is used for receiving the image and instruction data of the flat panel detector, and sending the image data to the flat panel detector.

[0023] In some embodiments, the trigger interface circuit is respectively connected to the trigger interface of the flat panel detector and the main processing circuit of the signal conditioning device, and is used for triggering the flat panel detector to perform image acquisition work.

[0024] In some embodiments, the power interface circuit is connected to the power interface of the flat panel detector and is used for supplying power to the flat panel detector.

[0025] The device provided by the embodiment of the present invention has the following technical effects:

[0026] 1) Whether it is to modify the slip ring system interface to adapt to the flat panel detector or to modify the flat panel detector interface to adapt to the slip ring, it will face the problems of long development cycle and high cost; compared with changing the detector or the slip ring, it has a short development cycle, low cost, and is applicable to various different types of detectors;

[0027] 2) By processing the existing functions in the flat panel detector or CT system in this device, the complexity and cost of the CT system or detector can be reduced;

[0028] 3) When the communication rate of the slip ring is low, the signal conditioning device can cache the image data transmitted by the detector and then send the stored data after matching the rate of the slip ring. Compared with a high-speed slip ring, the cost of a low-speed slip ring is lower, so the system cost can be reduced. Description of the Drawings

[0029] Figure 1 Is the architecture diagram of the CT system provided by the prior art;

[0030] Figure 2 Is the schematic diagram of the data link for the application of the flat panel detector provided by the prior art;

[0031] Figure 3 Is the architecture diagram of the system provided by the embodiment of the present invention with a signal conditioning device added between the flat panel detector and the slip ring;

[0032] Figure 4 Is the composition structure diagram of the signal conditioning device provided by the embodiment of the present invention;

[0033] Figure 5 Is the detailed structure diagram of the signal conditioning device provided by the embodiment of the present invention;

[0034] Figure 6 Is the detailed structure diagram of the signal conditioning device provided by the embodiment of the present invention;

[0035] Figure 7 This is the structural diagram of the main processing circuit provided by the embodiment of the present invention. Detailed implementation manners

[0036] In order to make the objectives, features, and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0037] A signal conditioning device is added between the flat panel detector and the slip ring, as Figure 3 shown.

[0038] After the image and instruction data of the flat panel detector reach this device, it first identifies whether the data is image data or instruction data. If it is image data, it is sent to the image data transmission interface of the slip ring and then transmitted to the computer; if it is instruction data, it is sent to the instruction data transmission interface of the slip ring and then transmitted to the computer.

[0039] After the instruction data of the computer reaches this device through the slip ring, the data is converted into an instruction that the flat panel detector can receive and transmitted to the flat panel detector through the integrated image and instruction data transmission channel.

[0040] At the same time, this device conditions the trigger signal on the slip ring into a trigger signal that the detector can recognize to trigger the detector to perform image acquisition.

[0041] The signal conditioning device is composed of a main processing circuit and an interface circuit:

[0042] Among them:

[0043] The interface circuit is divided into an interface circuit with the slip ring and an interface circuit with the flat panel detector, as Figure 4 shown;

[0044] (1) The interface circuit with the slip ring is connected to the slip ring to send the image data and instruction data required by the slip ring. At the same time, it receives the instruction data and trigger data transmitted by the slip ring;

[0045] The interface circuit with the slip ring includes an image data transmission interface circuit, an instruction data transmission interface circuit, a trigger interface circuit, and a power supply interface circuit. Among them,

[0046] The image data transmission interface circuit is respectively connected to the image data transmission interface of the slip ring and the main processing circuit of the signal conditioning device, and is used to send the identified and parsed image data of the flat panel detector to the image data transmission interface of the slip ring;

[0047] The instruction data transmission interface circuit is respectively connected to the instruction data transmission interface of the slip ring and the main processing circuit of the signal conditioning device, and is used to receive the instruction data sent by the slip ring or send the instruction data required by the slip ring;

[0048] The trigger interface circuit is respectively connected to the trigger interface of the slip ring and the main processing circuit of the signal conditioning device, and is used to receive the trigger instruction sent by the slip ring;

[0049] The power interface circuit is connected to the power interface of the slip ring and is used to supply power to the signal conditioning device;

[0050] (2) It is connected to the flat panel detector interface circuit and the flat panel detector, receives the image data and instruction data transmitted by the flat panel detector, and sends the instruction data that the flat panel detector can receive

[0051] The interface circuit with the flat panel detector consists of a data transmission interface circuit, a trigger interface circuit, and a power interface circuit.

[0052] The data transmission interface circuit is respectively connected to the data transmission interface of the flat panel detector and the main processing circuit of the signal conditioning device, and is used to receive the image and instruction data of the flat panel detector and send the image data to the flat panel detector;

[0053] The trigger interface circuit is respectively connected to the trigger interface of the flat panel detector and the main processing circuit of the signal conditioning device, and is used to trigger the flat panel detector to perform image acquisition work;

[0054] The power interface circuit is connected to the power interface of the flat panel detector and is used to supply power to the flat panel detector;

[0055] The specific circuit structure is as Figure 5 shown.

[0056] 2. The main processing circuit consists of a controller circuit and a storage circuit, as Figure 6 shown.

[0057] Among them:

[0058] (1) The controller circuit is the core of the signal conditioning device and is respectively connected to the slip ring interface circuit, the flat panel detector interface circuit, and the storage circuit. The main functions of the controller circuit are:

[0059] ① It is used to identify and analyze whether the data sent by the data transmission interface in the flat panel detector interface circuit is image data or instruction data, output the image data to the image data transmission interface in the slip ring interface circuit, and output the instruction data to the instruction data transmission interface in the slip ring interface circuit;

[0060] ②It is used to process the instruction data and trigger signals sent by the slip ring interface circuit, parse the instruction data and then transmit it to the data transmission interface in the flat panel detector interface circuit, condition the trigger signals into signals that meet the reception standards of the flat panel detector, and transmit them to the trigger interface circuit in the flat panel detector interface circuit;

[0061] ③It is used to cache the image data sent by the data transmission interface in the flat panel detector interface circuit and transmit it to the storage circuit;

[0062] ④It is used to call the image correction template in the storage circuit to correct the image data sent by the data transmission interface in the flat panel detector interface circuit;

[0063] ⑤It is used to preprocess the image data sent by the data transmission interface in the flat panel detector interface circuit;

[0064] (2) The storage circuit is connected to the controller circuit and is mainly used to store image data, image correction templates, and controller circuit startup programs such as DDR and NAND Flash.

[0065] The specific circuit structure is as Figure 7 shown.

[0066] 1. The signal conditioning device consists of a main processing circuit and an interface circuit. Among them, the interface circuit is divided into a slip ring interface circuit and a flat panel detector interface circuit, and the main processing circuit consists of a controller circuit and a storage circuit;

[0067] 2. It is connected to the slip ring interface circuit and the slip ring, sends the image data and instruction data required by the slip ring, and at the same time, receives the instruction data and trigger data transmitted by the slip ring;

[0068] 3. It is connected to the flat panel detector interface circuit and the flat panel detector, receives the image data and instruction data transmitted by the flat panel detector, and sends the instruction data that the flat panel detector can receive;

[0069] 4. The controller circuit is the core of the signal conditioning device and is respectively connected to the slip ring interface circuit, the flat panel detector interface circuit, and the storage circuit. The main functions of the controller circuit are:

[0070] ①It is used to identify and parse whether the data sent by the data transmission interface in the flat panel detector interface circuit is image data or instruction data, output the image data to the image data transmission interface in the slip ring interface circuit, and output the instruction data to the instruction data transmission interface in the slip ring interface circuit;

[0071] ② It is used to process the instruction data and trigger signals sent by the slip ring interface circuit, parse the instruction data and then transmit it to the data transmission interface in the flat panel detector interface circuit, condition the trigger signals into signals that meet the reception standards of the flat panel detector, and transmit them to the trigger interface circuit in the flat panel detector interface circuit;

[0072] 5. The storage circuit is connected to the controller circuit and is mainly used to store image data, image correction templates, and the controller circuit startup program.

[0073] It should be understood that the above specific embodiments of the present invention are only used for exemplary illustration or explanation of the principles of the present invention and do not constitute a limitation to the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present invention should be included within the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all variations and modifications that fall within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A signal conditioning device for a flat panel detector and a CT, which is arranged between the flat panel detector and the slip ring, and includes: The main processor and the interface circuit, and the interface circuit includes: a slip ring interface circuit and a flat panel detector interface circuit; The slip ring interface circuit is used to send the image data and command data required by the slip ring. At the same time, it receives the command data and trigger data transmitted by the slip ring; The flat panel detector interface circuit is used to receive the image data and command data transmitted by the flat panel detector, and send the command data that the flat panel detector can receive.

2. The device according to claim 1, characterized in that The slip ring interface circuit includes: an image data transmission interface circuit, a command data transmission interface circuit, a trigger interface circuit, and a power supply interface circuit.

3. The device according to claim 2, characterized in that The image data transmission interface circuit is respectively connected to the image data transmission interface of the slip ring and the main processing circuit of the signal conditioning device, and is used to send the identified and parsed flat panel detector image data to the image data transmission interface of the slip ring.

4. The device according to claim 2, characterized in that The command data transmission interface circuit is respectively connected to the command data transmission interface of the slip ring and the main processing circuit of the signal conditioning device, and is used to receive the command data sent by the slip ring or send the command data required by the slip ring.

5. The device according to claim 2, characterized in that The trigger interface circuit is respectively connected to the trigger interface of the slip ring and the main processing circuit of the signal conditioning device, and is used to receive the trigger command sent by the slip ring.

6. The device according to claim 2, characterized in that The power supply interface circuit is connected to the power supply interface of the slip ring and is used to supply power to the signal conditioning device.

7. The device according to claim 1, characterized in that The flat panel detector interface circuit includes: a data transmission interface circuit, a trigger interface circuit, and a power supply interface circuit.

8. The device according to claim 7, characterized in that The data transmission interface circuit is respectively connected to the data transmission interface of the flat panel detector and the main processing circuit of the signal conditioning device, and is used to receive the image and command data of the flat panel detector, and send the image data to the flat panel detector.

9. The device according to claim 7, characterized in that The trigger interface circuit is respectively connected to the trigger interface of the flat panel detector and the main processing circuit of the signal conditioning device, and is used to trigger the flat panel detector to perform image acquisition work.

10. The device according to claim 7, characterized in that The power supply interface circuit is connected to the power supply interface of the flat panel detector and is used to supply power to the flat panel detector.

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