Abstract: Provided is a radiographic apparatus configured to obtain an animated image of a fluoroscopic image, and thereafter complete fluoroscopy temporarily for taking a static image or the animated image for diagnosis, the radiographic apparatus allowing taking an image of a subject with suitable brightness. The apparatus determines a control condition (radiography condition) of an X-ray tube for taking the static image in accordance with the control condition of the X-ray tube upon obtaining the fluoroscopic image. With the disclosure, brightness of the subject contained in the fluoroscopic image is also regarded upon determination of the radiography condition. This achieves obtaining the suitable radiography condition even when obtaining the animated image stops before radiation has appropriate intensity during obtaining a live image. Accordingly, the apparatus in the disclosure allows obtaining a clear image with appropriate exposure.

Abstract: A filament current that is to be supplied to a filament of an x-ray tube under imaging conditions, from the imaging conditions of the tube current and the tube voltage that is to be supplied to the x-ray tube at the time of radiographic imaging, are stored as a filament current setting value in a storing portion, and the difference between an anticipated value for the tube current when x-ray emission is performed at a given filament current and a measured value for the tube current when x-ray emission is actually performed at that filament current is measured over time as a tube current value difference, and when the mean value for the tube current value difference over a specific time interval exceeds a setting value that has been set in advance, the filament current setting value that is stored in the storing portion is corrected.

Abstract: A mask-image-taking-time calculating section 36 (i) sets a first imaging-time, in a first mask image, in accordance with X-ray imaging-conditions, and (ii) calculates a second imaging-time, in mask images from the second, for a mask image to be taken next in accordance with the imaging-time and brightness of the mask image taken previously such that average brightness of the mask image taken previously and a mask image to be taken next is target brightness. A live-image-taking-time calculating section 38 calculates an imaging-time for a live image in accordance with an actual imaging-time for the mask image having X-rays applied thereto from an X-ray irradiating device in accordance with the first or second imaging-time. An image processor 6 calculates a subtraction image by difference between a reference mask image obtained through averaging two or more mask images taken in accordance with the first or second imaging-time and the live image.

Abstract: A radiographic examination apparatus improves response to fluoroscopy or continuous shooting by changing promptly the power-output of an X-ray tube. The apparatus and method, when an absolute value of variation C per fixed time interval between the filament electric current of current pulse-output calculated by the filament electric current variation calculation element is more than a setup value, a flash control between pulse conducts increases or decreases temporarily the filament electric current between pulses to become the filament electric current on flash control between pulses calculated by a filament electric current calculation element based on a radiation condition of a current pulse-output and the radiation condition of following pulse-output.

Abstract: Provided is a radiographic apparatus configured to obtain an animated image of a fluoroscopic image, and thereafter complete fluoroscopy temporarily for taking a static image or the animated image for diagnosis, the radiographic apparatus allowing taking an image of a subject with suitable brightness. The apparatus determines a control condition (radiography condition) of an X-ray tube for taking the static image in accordance with the control condition of the X-ray tube upon obtaining the fluoroscopic image. With the disclosure, brightness of the subject contained in the fluoroscopic image is also regarded upon determination of the radiography condition. This achieves obtaining the suitable radiography condition even when obtaining the animated image stops before radiation has appropriate intensity during obtaining a live image. Accordingly, the apparatus in the disclosure allows obtaining a clear image with appropriate exposure.

Abstract: A radiographic examination apparatus improves response to fluoroscopy or continuous shooting by changing promptly the power-output of an X-ray tube. The apparatus and method, when an absolute value of variation C per fixed time interval between the filament electric current of current pulse-output calculated by the filament electric current variation calculation element is more than a setup value, a flash control between pulse conducts increases or decreases temporarily the filament electric current between pulses to become the filament electric current on flash control between pulses calculated by a filament electric current calculation element based on a radiation condition of a current pulse-output and the radiation condition of following pulse-output.

Abstract: A filament current that is to be supplied to a filament of an x-ray tube under imaging conditions, from the imaging conditions of the tube current and the tube voltage that is to be supplied to the x-ray tube at the time of radiographic imaging, are stored as a filament current setting value in a storing portion, and the difference between an anticipated value for the tube current when x-ray emission is performed at a given filament current and a measured value for the tube current when x-ray emission is actually performed at that filament current is measured over time as a tube current value difference, and when the mean value for the tube current value difference over a specific time interval exceeds a setting value that has been set in advance, the filament current setting value that is stored in the storing portion is corrected.

Abstract: A mask-image-taking-time calculating section 36 (i) sets a first imaging-time, in a first mask image, in accordance with X-ray imaging-conditions, and (ii) calculates a second imaging-time, in mask images from the second, for a mask image to be taken next in accordance with the imaging-time and brightness of the mask image taken previously such that average brightness of the mask image taken previously and a mask image to be taken next is target brightness. A live-image-taking-time calculating section 38 calculates an imaging-time for a live image in accordance with an actual imaging-time for the mask image having X-rays applied thereto from an X-ray irradiating device in accordance with the first or second imaging-time. An image processor 6 calculates a subtraction image by difference between a reference mask image obtained through averaging two or more mask images taken in accordance with the first or second imaging-time and the live image.

Abstract: When performing an examination or a treatment that requires a high-quality image, the operator operates the foot switch with his or her foot, to increase the magnitude of depression of the foot switch. This increases the x-ray dose per unit time that is emitted towards the examination patient, making it possible to obtain a high quality captured image Or transparent image. In contrast, when, for example, directing a. catheter to a target position, the operator reduces the magnitude of depression of the foot switch by operating the foot switch with his or her foot. This makes it possible to reduce the dose with which the examination patient is exposed, by reducing the x-ray dose per unit time that is emitted toward the examination patient.