Abstract: In order to reduce the size of a data stream of image data transmitted via a network and to efficiently manage such a data stream, the image data is coded in a highly efficient fashion using a hierarchical coding algorithm, such as a wavelet transformation. When a data stream is being inputted, the data stream is analyzed and input of the data stream is interrupted in accordance with an analysis result. An interrupted stream is generated from the data stream that has already been inputted. The resultant interrupted stream is stored.

Abstract: The gain correction image is composed of a grid-free image regardless of the presence or absence of the grid or the kind thereof. The gain correction images are stored in the image memory unit, and, under the control of the pre-process unit and according to the result of the grid detection means, reference is made to the image process parameter table stored in the image process parameter memory unit and the matching gain correction image is downloaded from the image memory unit.

Abstract: The gain correction image is composed of a grid-free image regardless of the presence or absence of the grid or the kind thereof. The gain correction images are stored in the image memory unit, and, under the control of the pre-process unit and according to the result of the grid detection means, reference is made to the image process parameter table stored in the image process parameter memory unit and the matching gain correction image is downloaded from the image memory unit.

Abstract: An X-ray image photographing apparatus includes an image obtaining portion for obtaining an X-ray distribution transmitted through an object, a grid detecting system having a construction for obtaining information from a grid side by the action of inserting the grid for decreasing scattered rays into the apparatus, and detecting at least one of the presence or absence of the grid, the kind of the grid and the presence or absence of the replacement of the grid by the use of the construction, an image processing system for image processing and outputting image data collected by the image obtaining portion, and a memory portion preserving therein a plurality of sets of image processing parameters for controlling the image processing system. The image processing system selects the image processing parameters preserved in the memory on the basis of at least the result of the detection by the grid detecting system and executes image processing.

Abstract: An X-ray beam transmitted through an object is transmitted through a grid, which has been moved to the X-ray irradiation position, and reaches a panel sensor after scattered X-rays are removed by the grid. Image processing is done on the basis of a reduced image input from the panel sensor. As the reduced image, an image reduced to ⅛ the image output from the panel sensor in both the vertical and horizontal directions is used, and the image is binarized by a predetermined threshold value. Noise of the binary image is removed by an opening filter, and lines of the noise-removed image are scanned in the x- and y-directions to form a list of scan start and end points. The average values of these points are calculated to determine an irradiated region. By extracting an image of the irradiated region from the panel sensor, fluoroscopic image observation and still image photographing are efficiently done using a panel sensor with a large photographing frame.

Abstract: A radiographic stand with a radiation image receiving portion includes a lying stand having a top plate on which a subject lies down, a radiation image receiving portion located below the top plate, and a moving mechanism for making the radiation image receiving portion movable in the widthwise direction or the lengthwise direction of the top plate. The moving mechanism also makes the radiation image receiving portion erectable in a vertical direction.

Abstract: An image processing apparatus includes a sensor including a sensing region which senses the image of an object, and a correcting circuit which performs first processing which corrects image data based on a second region corresponding to an irradiation region in the sensing region by using correcting data based on a first region corresponding to another irradiation region in the sensing region, and second processing which performs processing on the image data based on a third region included in the second region, and which is excluded in the overlapping part between the first region and the second region.

Abstract: An image processing device for obtaining a stable image of a high quality is provided. A dynamic range compression circuit executes a dynamic range compressing process for adding a value depending on a peripheral average pixel value to a pixel value of an input image. A contrast enhancement circuit executes a contrast enhancing process to a compressed image derived by the dynamic range compression circuit. Thus, a decrease in contrast of the whole image due to an excessive increase or decrease in density of the portion where the dynamic range compressing process was executed can be prevented.

Abstract: A system bus for connecting modules in a workstation for medical service has connected thereto a CPU, a main memory device, an input-output apparatus comprising a CRT or a display device such as liquid crystal and an operation input device, an ISDN interface, a disc and an optical card device. A list of data structural bodies stored in an optical card carried by a patient is read by the optical card device, and data access is effected to facilities which seem to require data reference by the use of a facility line number recorded on the optical card, through the ISDN interface.

Abstract: A system bus for connecting modules in a workstation for medical service has connected thereto a CPU, a main memory device, an input-output apparatus comprising a CRT or a display device such as liquid crystal and an operation input device, an ISDN interface, a disc and an optical card device. A list of data structural bodies stored in an optical card carried by a patient is read the optical card device, and data access is effected to facilities which seem to require data reference the use of a facility line number recorded on the optical card, through the ISDN interface.

Abstract: An X-ray inspection apparatus is provided with main detectors each for detecting the absorption amount of X-ray beams delivered from an X-ray focal point, a reference detector for detecting variations in the size or position of the X-ray focal point, and means for removing errors due to influence of the X-ray focal point variations, based on the detention result of the reference detector.

Abstract: X-rays are projected from different directions onto a specific slice of an object to be examined, and corresponding projection data is acquired. The projection data is divided into regions in accordance with the data characteristics. The regions are convoluted by corresponding filter functions having different frequency characteristics and are combined to obtain back-projection data, thereby reconstructing an image for the slice.