Abstract: The present invention relates to a method for reinforcing a multiple-choice QA model based on adversarial learning techniques, wherein incorrect answers are further generated based on a data set used in the process of training the multiple-choice QA model to enrich data which are learnable by the multiple-choice QA model.

Abstract: The present disclosure relates to an X-ray device, and an X-ray device according to an embodiment of the present disclosure comprises: a radiator configured to radiate an X-ray; a distance measurement sensor configured to measure a value of a distance to an object; and a controller configured to acquire a first separation distance between an X-ray radiation focal point of the radiator and a subject, and control operation of the radiator based on the acquired first separation distance. Through these, the radiation of the X-ray can be prevented without a physical skin guard when the subject approaches within a certain distance from the radiator, thereby preventing the increase in the size caused by the installation of the physical skin guard, and a process of manually setting a strength of the X-ray radiation output according to the thickness of the subject can be omitted, thereby improving easiness of the X-ray imaging and reducing the time for the X-ray imaging.

Abstract: An X-ray imaging device may comprise: a radiation unit configured to preheat a filament and radiate an X-ray; a detection unit configured to detect shake of the radiation unit and generate information on the shake of the radiation unit; and a controller configured to determine a degree of the shake based on the information on the shake received from the detection unit and control an operation of the radiation unit depending on the determined degree of the shake. Therefore, the device can acquire a clear X-ray image without blur, and furthermore has effect in that unnecessary radiation exposure by re-photographing due to the blur of the X-ray image can be minimized.

Abstract: A power supply apparatus for an X-ray imaging system. A capacitor unit including a plurality of capacitor cells is connected in series to a single cell battery, such that the capacitor unit is charged using the single cell battery. Only when respective capacitor cells of the capacitor unit are charged, respective balance circuits corresponding to the respective capacitor cells are controlled to be turned on. When the balancing of the respective capacitor cells is completed, the balance circuits are opened. Accordingly, the power consumption of the capacitor cells is minimized.

Abstract: The present invention relates to a method for reinforcing a multiple-choice QA model based on adversarial learning techniques, wherein incorrect answers are further generated based on a data set used in the process of training the multiple-choice QA model to enrich data which are learnable by the multiple-choice QA model.

Abstract: The present invention relates to a method of operating a question-answer model through reinforcement learning in an apparatus of generating an answer to a question. The method includes: sampling a latent variable from any passage by a first agent; extracting a question-answer dataset from the passage based on the latent variable; determining whether or not to apply the extracted question-answer dataset to learning of a question-answer model generating an answer to any question by a second agent; and applying a change value of performance of the question-answer model as a reward to the first agent and the second agent.

Abstract: A power supply apparatus for an X-ray imaging system. A capacitor unit including a plurality of capacitor cells is connected in series to a single cell battery, such that the capacitor unit is charged using the single cell battery. Only when respective capacitor cells of the capacitor unit are charged, respective balance circuits corresponding to the respective capacitor cells are controlled to be turned on. When the balancing of the respective capacitor cells is completed, the balance circuits are opened. Accordingly, the power consumption of the capacitor cells is minimized.

Abstract: The present invention relate to an X-ray photographing apparatus, and more particularly, to a high voltage driving circuit for X-ray tube, in which a first voltage multiplying rectifier unit and a second voltage multiplying rectifier unit are in series connected to each other based on a high voltage generation unit to stably convert a high voltage power generated from the high voltage generation unit into a drive power for an X-ray tube with high energy efficiency, and in which a plurality of isolation transformers or high voltage transformers is in series connected to each other in the high voltage generation unit to divide a voltage of the second voltage multiplying rectifier unit into a withstanding voltage of the isolation transformers or the high voltage transformers, thereby ensuring excellent insulation properties.

Abstract: The present invention relate to an X-ray photographing apparatus, and more particularly, to a high voltage driving circuit for X-ray tube, in which a first voltage multiplying rectifier unit and a second voltage multiplying rectifier unit are in series connected to each other based on a high voltage generation unit to stably convert a high voltage power generated from the high voltage generation unit into a drive power for an X-ray tube with high energy efficiency, and in which a plurality of isolation transformers or high voltage transformers is in series connected to each other in the high voltage generation unit to divide a voltage of the second voltage multiplying rectifier unit into a withstanding voltage of the isolation transformers or the high voltage transformers, thereby ensuring excellent insulation properties.

Abstract: The present invention relates to an X-ray imaging apparatus, and more particularly, to an X-ray imaging apparatus in which a condenser is charged with low battery voltage, and the charged voltage of the condenser, or the sum voltage of the output voltage of the battery serially connected to the condenser and the charged voltage of the condenser is used as X-ray generating power. The X-ray imaging apparatus according to the present invention is configured such that the battery power and the condenser power are serially connected to provide power for operating the X-ray imaging apparatus, thus generating power for operating the X-ray imaging apparatus from the low battery power, and obtaining a lightweight and less bulky X-ray imaging apparatus.

Abstract: An X-ray imaging system includes a digital imaging panel for capturing an X-ray image of an object and an X-ray device for irradiating a beam of X-rays toward the digital imaging panel and making wireless communication with the digital imaging panel. The X-ray device is capable of directly receiving data of an X-ray image of an object from a digital imaging panel, enabling an operator to see the X-ray image on a real time basis and editing and storing the X-ray image by itself.

Abstract: The present invention relates to an X-ray scanning system which is used to synchronize the preheating of an X-ray irradiation unit and the initialization of a digital image panel using wireless synchronization signals. The preheating of the X-ray irradiation unit and the initialization of the digital image panel are synchronized with each other using the wireless synchronization signal generated by the user's commands inputted through a hand-held switch unit. This makes it possible to conveniently take an X-ray image of an object.

Abstract: The present invention relates to an X-ray imaging apparatus, and more particularly, to an X-ray imaging apparatus in which a condenser is charged with low battery voltage, and the charged voltage of the condenser, or the sum voltage of the output voltage of the battery serially connected to the condenser and the charged voltage of the condenser is used as X-ray generating power. The X-ray imaging apparatus according to the present invention is configured such that the battery power and the condenser power are serially connected to provide power for operating the X-ray imaging apparatus, thus generating power for operating the X-ray imaging apparatus from the low battery power, and obtaining a lightweight and less bulky X-ray imaging apparatus.

Abstract: An X-ray device for irradiating a beam of X-rays on an object to capture an X-ray image of the object is smaller in size and weight than conventional ones. The X-ray device includes an X-ray tube for generating the beam of X-rays and irradiating the beam of X-rays on the object, a shutter arranged around an X-ray irradiation axis for regulating an X-ray irradiation region on which the beam of X-rays is irradiated through the object, and a visual indicator unit arranged on the shutter for movement together with the shutter, the visual indicator unit being designed to visually indicate the X-ray irradiation region. In the X-ray device, the X-ray irradiation region is visually indicated by laser light without having to use a lamp otherwise provided between the X-ray tube and the shutter.

Abstract: An X-ray imaging system includes a digital imaging panel for capturing an X-ray image of an object and an X-ray device for irradiating a beam of X-rays toward the digital imaging panel and making wireless communication with the digital imaging panel. The X-ray device is capable of directly receiving data of an X-ray image of an object from a digital imaging panel, enabling an operator to see the X-ray image on a real time basis and editing and storing the X-ray image by itself.

Abstract: The present invention relates to an X-ray scanning system which is used to synchronize the preheating of an X-ray irradiation unit and the initialization of a digital image panel using wireless synchronization signals. The preheating of the X-ray irradiation unit and the initialization of the digital image panel are synchronized with each other using the wireless synchronization signal generated by the user's commands inputted through a hand-held switch unit. This makes it possible to conveniently take an X-ray image of an object.

Abstract: An X-ray device for irradiating a beam of X-rays on an object to capture an X-ray image of the object is smaller in size and weight than conventional ones. The X-ray device includes an X-ray tube for generating the beam of X-rays and irradiating the beam of X-rays on the object, a shutter arranged around an X-ray irradiation axis for regulating an X-ray irradiation region on which the beam of X-rays is irradiated through the object, and a visual indicator unit arranged on the shutter for movement together with the shutter, the visual indicator unit being designed to visually indicate the X-ray irradiation region. In the X-ray device, the X-ray irradiation region is visually indicated by laser light without having to use a lamp otherwise provided between the X-ray tube and the shutter.

Abstract: A battery-powered x-ray imaging apparatus uses a battery with a reduced capacity as a power source. The x-ray imaging apparatus includes a DC-AC converting part for converting a direct current of a battery to an alternating current, a high-voltage transformer for increasing a magnitude of the alternating current to output a high-voltage alternating current, an AC-DC converting part for converting the high-voltage alternating current to a high-voltage direct current, and an x-ray tube having an anode terminal and a cathode terminal electrically connected to the AC-DC converting part. The x-ray tube is designed to generate x-rays by allowing electrons emitted from the cathode terminal to impinge on the anode terminal. The DC-AC converting part, the high-voltage transformer, the AC-DC converting part and the x-ray tube are sealingly received within the housing part filled with oil.

Abstract: A high voltage transformer is small-sized, lightweight and less costly to fabricate. The high voltage transformer is designed to maintain equal the potential difference between the components of two transforming component groups and also to keep the components of the respective transforming component groups equipotential at the same distance in the direction extending from a first end to a second end. This eliminates the need to dispose an insulating body between the components of the first and second transforming component groups. This also makes it possible to fabricate the high voltage transformer with a small size and in a cost-effective manner.

Abstract: A battery-powered x-ray imaging apparatus uses a battery with a reduced capacity as a power source. The x-ray imaging apparatus includes a DC-AC converting part for converting a direct current of a battery to an alternating current, a high-voltage transformer for increasing a magnitude of the alternating current to output a high-voltage alternating current, an AC-DC converting part for converting the high-voltage alternating current to a high-voltage direct current, and an x-ray tube having an anode terminal and a cathode terminal electrically connected to the AC-DC converting part. The x-ray tube is designed to generate x-rays by allowing electrons emitted from the cathode terminal to impinge on the anode terminal. The DC-AC converting part, the high-voltage transformer, the AC-DC converting part and the x-ray tube are sealingly received within the housing part filled with oil.