DSA device

Abstract

The utility model relates to DSA equipment. The DSA equipment comprises a C-shaped arm, an X-ray tube, an inverter box and a high-pressure oil tank. The high-pressure oil tank is connected with the inverter box through a first cable; the high-voltage oil tank and the X-ray tube are both arranged on the C-shaped arm, the inverter box is used for providing high-frequency alternating current for the high-voltage oil tank, and the high-voltage oil tank is used for converting the high-frequency alternating current into high-voltage direct current so as to provide a high-voltage direct-current electric field for the X-ray tube, so that X-rays are generated in the X-ray tube. The high-voltage oil tank and the X-ray tube are arranged on the C-shaped arm, so that the distance between the high-voltage oil tank and the X-ray tube is greatly shortened, a high-voltage cable between the high-voltage oil tank and the X-ray tube is shortened or canceled, and the situation that when the system works in a kV pulse mode, a large number of invalid rays are generated when voltage drops is avoided; therefore, the radiation dose of doctors and patients is reduced. And meanwhile, the second cable is short, so that the difficulty and the cost of cable laying can be reduced.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to DSA equipment. Background Technology

[0002] The high-pressure oil tank for digital subtraction angiography (DSA) is usually placed in the equipment room, while the X-ray tube is located on the C-arm in the operating room. The high-pressure oil tank needs to be connected to the X-ray tube via a long high-pressure cable.

[0003] However, there is cable capacitance in the high-voltage cable between the high-voltage tank and the X-ray tube. The energy stored in this capacitance can easily generate a large amount of useless radiation, increasing the radiation dose for doctors and patients. Utility Model Content

[0004] Therefore, it is necessary to provide a DSA device to address the problem that the high-voltage cable between the high-voltage tank and the X-ray tube easily generates a large amount of useless radiation.

[0005] A DSA device, the DSA device comprising:

[0006] C-arm;

[0007] Inverter box;

[0008] X-ray tube;

[0009] The high-pressure oil tank is connected to the inverter box via a first cable;

[0010] Both the high-pressure oil tank and the X-ray tube are mounted on the C-arm.

[0011] The inverter box is used to provide high-frequency alternating current to the high-voltage oil tank, and the high-voltage oil tank is used to convert the high-frequency alternating current into high-voltage direct current to provide a high-voltage direct current electric field to the X-ray tube, so that X-rays are generated in the X-ray tube.

[0012] In one embodiment, the inverter box and the high-voltage oil tank are located in different rooms.

[0013] In one embodiment, the inverter box is located in the electrical equipment room.

[0014] In one embodiment, the DSA device further includes a detector, which is disposed on opposite sides of the C-arm, and the high-pressure oil tank is disposed on the side of the C-arm closer to the X-ray tube.

[0015] In one embodiment, the high-pressure oil tank and the X-ray tube are connected as a single unit.

[0016] In one embodiment, the high-pressure oil tank is connected to the X-ray tube via a second cable.

[0017] In one embodiment, an inverter power unit is provided inside the inverter box;

[0018] The high-voltage tank is equipped with a high-voltage generation unit and a grid voltage control unit. The inverter power unit is connected to the input terminal of the high-voltage generation unit via a first cable. The high-voltage generation unit has an anode high-voltage output terminal and a cathode high-voltage output terminal. The anode high-voltage output terminal is connected to the anode end of the X-ray tube via a second cable. The cathode high-voltage output terminal is connected to the cathode end of the X-ray tube via a second cable. The grid voltage control unit is connected to the cathode end of the X-ray tube via a second cable.

[0019] In one embodiment, Rogowski coils are respectively installed at the anode high-voltage output terminal and the cathode high-voltage output terminal, and the second cable connecting the anode high-voltage output terminal to the anode end of the X-ray tube passes through the Rogowski coil; the second cable connecting the cathode high-voltage output terminal to the cathode end of the X-ray tube passes through the Rogowski coil.

[0020] In one embodiment, an arc suppression resistor is provided inside the high-pressure oil tank, and the arc suppression resistor is located at the anode high-pressure output terminal.

[0021] In one embodiment, the inverter box further includes a main control unit, which is signal-connected to the inverter power unit and the high voltage generation unit.

[0022] In the aforementioned DSA equipment, both the X-ray tube and the high-voltage oil tank are mounted on the C-arm. This shortens the distance between the high-voltage oil tank and the X-ray tube, thereby shortening or eliminating the high-voltage cable between them, reducing the capacitance in the high-voltage cable, and consequently reducing the radiation dose to doctors and patients. Furthermore, the shorter length of the high-voltage cable reduces the difficulty and cost of cable installation. Attached Figure Description

[0023] Figure 1 This is a multi-frame ray diagram of the kV pulse mode in one embodiment.

[0024] Figure 2 This is a schematic diagram of the structure of a DSA device in one embodiment.

[0025] Figure 3 This is a schematic diagram of the structure of a DSA device in another embodiment.

[0026] Figure 4This is a schematic diagram of the electrical connections within a DSA device in one embodiment.

[0027] Reference numerals: 100, Inverter box; 110, Inverter power unit; 120, Main control unit; 130, Three-phase rectifier unit; 200, High-voltage oil tank; 210, High-voltage generation unit; 220, Grid voltage control unit; 240, Arson suppression resistor; 300, X-ray tube; 310, Filament; 320, Target plate; 410, First cable; 420, Second cable; 510, C-arm; 520, Detector; 540, Operating room; 550, Equipment room. Detailed Implementation

[0028] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0029] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0030] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0034] In practical use, to reduce radiation dose, the X-rays in DSA equipment are usually not continuously applied, but rather operate in a multi-frame mode, such as... Figure 1 As shown. Multi-frame frequency X-rays are generally generated through kV pulse (kV-type pulse sequence) mode. When the system operates in kV pulse mode, the high-voltage output pulse is kV and the pulse is mA, and the X-ray tube 300 generates pulsed X-rays. However, when the high-voltage inverter box 100 and the oil tank are placed in the equipment room 550, and the X-ray tube 300 is placed on the C-arm in the operating room 540, the high-voltage oil tank 200 is connected to the X-ray tube 300 through high-voltage cables. The length of the high-voltage cables is usually 30m-40m, and there are 2-3 cables. These cables have a large parasitic capacitance, which can be up to 10 times the capacitance of the high-voltage oil tank 200's internal output capacitor. At this time, when the system is in kV pulse mode, when the voltage drops, the energy stored in the capacitor on the high-voltage cable will generate a large amount of ineffective radiation, causing additional radiation dose.

[0035] See Figures 2-4 An embodiment of this application provides a DSA device including a C-arm 510, an inverter box 100, a high-voltage oil tank 200, and an X-ray tube 300. The high-voltage oil tank 200 is connected to the inverter box 100 via a first cable 410; both the X-ray tube 300 and the high-voltage oil tank 200 are mounted on the C-arm 510; wherein, the inverter box 100 is used to provide high-frequency alternating current to the high-voltage oil tank 200, and the high-voltage oil tank 200 is used to convert the high-frequency alternating current into high-voltage direct current to provide a high-voltage direct current electric field to the X-ray tube 300, thereby generating X-rays in the X-ray tube 300.

[0036] The first cable 410 includes a power line and a signal line, and the voltage transmitted in the first cable 410 generally does not exceed 1kV.

[0037] In this embodiment, both the X-ray tube 300 and the high-voltage oil tank 200 are mounted on the C-arm 510, thus shortening the distance between the high-voltage oil tank 200 and the X-ray tube 300. This shortens or eliminates the high-voltage cable between the X-ray tube 300 and the high-voltage oil tank 200, reducing the cable capacitance and preventing the generation of a large amount of ineffective radiation when the voltage drops during system operation in kV pulse mode, thereby reducing the radiation dose to doctors and patients. Furthermore, the shorter length of the high-voltage cable reduces the difficulty and cost of cable laying.

[0038] Furthermore, the inverter box 100 and the high-voltage oil tank 200 are located in different rooms.

[0039] In this embodiment, the high-voltage oil tank 200 is installed on the C-arm 510, that is, the high-voltage oil tank 200 is located inside the operating room 540, and the inverter box 100 is located outside the operating room 540, which can avoid electromagnetic interference of the inverter box 100 to the medical equipment in the operating room during operation.

[0040] Specifically, the X-ray tube 300 and the high-pressure oil tank 200 are both located in the operating room 540, and the inverter box 100 is located in the equipment room 550.

[0041] In this embodiment, both the X-ray tube 300 and the high-pressure oil tank 200 are mounted on the C-arm 510, meaning the distance between them is fixed, the length of the high-pressure cable is fixed, and the high-pressure oil tank 200 is connected to the inverter box 100 via a first cable 410. The first cable 410 includes power and signal lines, and its placement within the hospital space is not restricted, thus facilitating flexible placement of the inverter box within the hospital space. The inverter box 100 is located within the equipment room 550. The cooling equipment in the equipment room maintains the indoor temperature within a suitable range, ensuring that the inverter box's performance is not affected or its lifespan is not shortened due to overheating.

[0042] Of course, in other embodiments, the high-voltage oil tank 200 can also be located in other spaces near the X-ray tube 300, as long as the extension length of the high-voltage cable can be shortened.

[0043] The high-voltage oil tank 200 includes a housing filled with insulating oil. The high-voltage generating unit 210 and the grid voltage control unit 220 are encapsulated within the housing. The insulating oil serves to provide insulation and heat dissipation, ensuring the safe operation of the equipment.

[0044] In some embodiments, combined with Figure 3 The inverter box 100 is equipped with an inverter power unit 110; the high-voltage oil tank 200 is equipped with a high-voltage generation unit 210 and a grid voltage control unit 220. The inverter power unit 110 is connected to the input terminal of the high-voltage generation unit 210 through a first cable 410. The high-voltage generation unit 210 has an anode high-voltage output terminal and a cathode high-voltage output terminal. The anode high-voltage output terminal is connected to the anode end of the X-ray tube 300 through a second cable 420, and the cathode high-voltage output terminal is connected to the cathode end of the X-ray tube 300 through a second cable 420. The grid voltage control unit 220 is connected to the cathode end of the X-ray tube 300 through a second cable 420.

[0045] It should be noted that the inverter power unit 110 is used to generate high-frequency alternating current. This high-frequency alternating current is connected to the high-voltage generation unit 210 via a first cable 410. The high-voltage output terminal of the high-voltage generation unit 210 is connected to the anode of the X-ray tube 300 via a second cable 420, and the high-voltage output terminal of the high-voltage generation unit 210 is connected to the cathode of the X-ray tube 300 via a second cable 420, thus creating a high-voltage direct current electric field within the X-ray tube 300. A filament 310 is installed at the cathode of the X-ray tube 300, and a target disk 320 is installed at the anode. When the filament 310 is heated by electricity, it emits electrons. These electrons collide at high speed with the target disk 320 under the influence of the high-voltage electric field, thereby generating X-rays. The grid voltage control unit 220 is connected to the cathode of the X-ray tube 300 via the second cable 420. The grid voltage control unit 220 can apply different voltages to the cathode, thereby controlling the electrons emitted from the filament 310. For example, when the grid voltage control unit 220 applies a negative voltage to the cathode, it creates a suppressive electric field on the electrons emitted by the filament 310, reducing or preventing the electrons from moving toward the anode, thereby controlling the tube current of the X-ray tube 300 and realizing the switching control of X-ray emission.

[0046] The main load of the grid voltage control unit 220 is the parasitic capacitance between the cores of the high-voltage cable between the grid voltage control unit 220 and the X-ray tube 300. The longer the second cable 420 is, the larger the parasitic capacitance between the cores, the heavier the load on the grid voltage control unit 220, and the larger the required grid control volume. This also limits the application of grid-controlled fly-focus technology. In this embodiment, by shortening the distance between the grid voltage control unit 220 and the X-ray tube 300, that is, reducing the length of the second cable 420 between the grid voltage control unit 220 and the X-ray tube 300, the load on the grid voltage control unit 220 is reduced, so as to facilitate the application of grid-controlled fly-focus technology.

[0047] In some embodiments, the DSA device also includes a detector 520, which is disposed on opposite sides of the C-arm 510, and a high-pressure oil tank 200 is disposed on the side of the C-arm 510 near the X-ray tube 300.

[0048] Specifically, the anode high-voltage output terminal is connected to the anode end of the X-ray tube 300 via a high-voltage cable, the cathode high-voltage output terminal is connected to the cathode end of the X-ray tube 300 via a high-voltage cable, and the grid voltage control unit 220 is connected to the cathode end of the X-ray tube 300 via a high-voltage cable. The C-arm 510 is a C-arm, with the detector 520 and the X-ray tube 300 respectively located at both ends of the C-arm.

[0049] In this embodiment, the X-ray tube 300 emits X-rays, and the detector 520 receives the X-rays after they pass through the patient's body and converts them into digital signals or image signals. A high-voltage oil tank 200 is located on the side of the C-arm 510 near the X-ray tube 300. The high-voltage oil tank 200 is connected to the X-ray tube 300 via a high-voltage cable to further shorten the cable's extension length and reduce the radiation dose. Simultaneously, since the high-voltage oil tank 200 is directly connected to the X-ray tube 300 via the high-voltage cable, the cable does not need to be wound around the robotic arm, thus reducing the difficulty of laying the high-voltage cable.

[0050] In some embodiments, the high-pressure oil tank 200 and the X-ray tube 300 are connected as a single unit.

[0051] In this embodiment, the high-pressure oil tank 200 and the X-ray tube 300 are connected as a single unit to further reduce their overall volume. Simultaneously, the high-pressure cable between the high-pressure oil tank 200 and the X-ray tube 300 can be eliminated; they can be connected by a wire. "Connected as a single unit" means that the high-pressure oil tank 200 and the X-ray tube 300 are assembled together using bolts, welding, or casting to form a single entity.

[0052] In some other embodiments, the high-voltage oil tank 200 is connected to the X-ray tube 300 via a second cable 420. Specifically, the anode high-voltage output terminal is connected to the anode end of the X-ray tube 300 via the second cable, the cathode high-voltage output terminal is connected to the cathode end of the X-ray tube 300 via the second cable, and the grid voltage control unit 220 is connected to the cathode end of the X-ray tube 300 via the second cable. The second cable 420 is a high-voltage cable.

[0053] It should be noted that under high-voltage conditions, when the insulation performance of the high-voltage oil tank 200 and X-ray tube 300 deteriorates, impurities are present, the electric field distribution is uneven, or other factors affect the system, the high-voltage electric field may break down the insulating medium (such as insulating oil) inside the high-voltage oil tank 200, causing a momentary conductive path to appear in areas that should not be conductive, resulting in an arc discharge. This arc discharge phenomenon is called "arcing". Arcing generates high temperatures, strong light, and electromagnetic interference, which may not only damage the relevant components inside the high-voltage oil tank 200 and X-ray tube 300, but also affect the normal operation of the entire DSA equipment. Therefore, in practical use, it is necessary to be able to quickly detect whether the arcing location is in the high-voltage oil tank 200 or the X-ray tube 300. In addition, due to the complex parasitic parameters of long high-voltage cables, the flow path of the arcing current is inconsistent with the extension direction of the long high-voltage cable during arcing, making it impossible for the Rogowski coil to detect the arcing location.

[0054] In this application, both the X-ray tube 300 and the high-pressure oil tank 200 are mounted on the C-arm 510. The X-ray tube 300 and the high-pressure oil tank 200 are connected by a second cable 420, which is a high-voltage cable. At this time, the length of the high-voltage cable between the X-ray tube 300 and the high-pressure oil tank 200 is relatively short. Rogowski coils can be installed at the anode high-voltage output end and the cathode high-voltage output end, respectively. The second cable 420, which connects the anode high-voltage output end to the anode end of the X-ray tube 300, passes through the Rogowski coil. The second cable 420, which connects the cathode high-voltage output end to the cathode end of the X-ray tube 300, passes through the Rogowski coil. The firing position can be determined by detecting the output signal of the Rogowski coil.

[0055] In this embodiment, both the X-ray tube 300 and the high-pressure oil tank 200 are mounted on the C-arm 510, and the high-pressure oil tank 200 is connected to the X-ray tube 300 via a second cable 420. This shortens the extension length of the second cable 420, making the output capacitance inside the high-pressure oil tank 200 much larger than the capacitance in the second cable 420. Furthermore, the second cable 420, connecting the anode high-voltage output terminal to the anode end of the X-ray tube 300, passes through a Rogowski coil; the second cable 420, connecting the cathode high-voltage output terminal to the cathode end of the X-ray tube 300, also passes through a Rogowski coil. When arcing occurs in the X-ray tube 300, current flows through the Rogowski coil; when arcing occurs inside the high-pressure oil tank 200, no current flows through the Rogowski coil. The arcing location can be determined by detecting the output signal of the Rogowski coil.

[0056] In related technologies, when arcing occurs in the X-ray tube 300, the capacitor of the long high-voltage cable has a high energy storage capacity, which can easily damage the X-ray tube 300. In order to suppress the arcing current of the high-voltage cable, an arcing suppression resistor 240 is usually connected in series inside the X-ray tube 300. However, this will increase the size of the X-ray tube 300. Furthermore, under normal working conditions when no arcing occurs, the arcing suppression resistor 240 will also generate heat, increasing the heat dissipation burden of the X-ray tube 300.

[0057] In some embodiments, a spark suppression resistor 240 is provided inside the high-pressure oil tank 200, and the spark suppression resistor 240 is located at the anode high-pressure output terminal.

[0058] In this embodiment, both the X-ray tube 300 and the high-voltage oil tank 200 are mounted on the C-arm 510, thereby shortening the high-voltage cable between the X-ray tube 300 and the high-voltage oil tank 200. In this case, the capacitance energy stored in the cable between the X-ray tube 300 and the high-voltage oil tank 200 is low, making it less likely to damage the X-ray tube 300. This application only requires an arc suppression resistor 240 at the anode high-voltage output terminal of the high-voltage generation unit 210.

[0059] In some embodiments, the inverter box 100 further includes a main control unit 120, which is signal-connected to the inverter power unit 110 and to the high voltage generation unit 210.

[0060] In this embodiment, the main control unit 120 is signal-connected to the inverter power unit 110 and is used to control the inverter power unit 110. The main control unit 120 is also signal-connected to the high voltage generation unit 210. The main control unit 120 is used to receive signals fed back by the high voltage generation unit 210, control the inverter power unit 110 through the signals, and simultaneously receive signals transmitted by the inverter power unit 110.

[0061] In some embodiments, the inverter box 100 further includes a three-phase rectifier unit 130, which is connected to the inverter power unit 110 via a first cable 410. The three-phase grid power is rectified by the three-phase rectifier unit 130 into direct current (DC). The DC power is then converted into high-frequency alternating current (AC) by the inverter power unit 110. The AC power is connected to the high-voltage generation unit 210 in the oil tank via a low-voltage power line. After being stepped up and rectified by the transformer in the high-voltage generation unit 210, cathode high voltage is generated at the cathode output terminal, and anode high voltage is generated at the anode output terminal. The anode high voltage is connected to the target plate 320 of the X-ray tube 300 via a second cable 420, and the cathode high voltage is connected to the cathode of the X-ray tube 300 via a second cable 420, thus applying a high-voltage electric field to the X-ray tube 300.

[0062] The DSA device in this application may be a digital subtraction angiography machine, a CT scanning device, or a digital X-ray imaging device.

[0063] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A DSA device, characterized in that, The DSA device includes: C-arm (510); Inverter box (100); The high-pressure oil tank (200) is connected to the inverter box (100) via the first cable (410); X-ray tube (300); The high-pressure oil tank (200) and the X-ray tube (300) are both mounted on the C-arm (510); The inverter box (100) is used to provide high-frequency AC power to the high-voltage oil tank (200), and the high-voltage oil tank (200) is used to convert the high-frequency AC power into high-voltage DC power to provide a high-voltage DC electric field to the X-ray tube (300), so that X-rays are generated in the X-ray tube (300).

2. The DSA device of claim 1, wherein, The inverter box (100) and the high-pressure oil tank (200) are located in different rooms.

3. The DSA device of claim 1, wherein, The inverter box (100) is located in the electrical equipment room.

4. The DSA device of claim 1, wherein, The DSA device also includes a detector (520), which is respectively disposed on both sides of the C-arm (510) opposite to the X-ray tube (300), and the high-pressure oil tank (200) is disposed on the side of the C-arm (510) near the X-ray tube (300).

5. The DSA device of claim 1, wherein, The high-pressure oil tank (200) and the X-ray tube (300) are connected as a single unit.

6. The DSA device of claim 1, wherein, The high-pressure oil tank (200) is connected to the X-ray tube (300) via a second cable (420).

7. The DSA device according to any one of claims 1-6, characterized in that, The inverter box (100) is equipped with an inverter power unit (110); The high-pressure oil tank (200) is equipped with a high-pressure generating unit (210) and a grid voltage control unit (220). The inverter power unit (110) is connected to the input terminal of the high-pressure generating unit (210) through a first cable (410). The high-pressure generating unit (210) has an anode high-pressure output terminal and a cathode high-pressure output terminal. The anode high-pressure output terminal is connected to the anode end of the X-ray tube (300) through a second cable (420). The cathode high-pressure output terminal is connected to the cathode end of the X-ray tube (300) through a second cable (420). The grid voltage control unit (220) is connected to the cathode end of the X-ray tube (300) through a second cable (420).

8. The DSA device of claim 7, wherein, Rogowski coils are installed at the anode high-voltage output terminal and the cathode high-voltage output terminal respectively. The second cable (420) connecting the anode high-voltage output terminal to the anode end of the X-ray tube (300) passes through the Rogowski coil. The second cable (420) connecting the cathode high-voltage output terminal to the cathode end of the X-ray tube (300) passes through the Rogowski coil.

9. The DSA device of claim 7, wherein, The high-pressure oil tank (200) is equipped with an arc suppression resistor (240), which is located at the anode high-pressure output terminal.

10. The DSA device of claim 7, wherein, The inverter box (100) also includes a main control unit (120), which is signal-connected to the inverter power unit (110) and the high voltage generation unit (210).

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