Abstract: An X-ray imaging apparatus irradiates an object with X rays radiated by an X-ray generator, converts an image of the object produced by X-rays transmitted through the object into an electrical signal, processes the X-ray image and visualizes the object image by a display unit. In the imaging apparatus, the amount of spatial coordinate distortion of the picked up image is measured from an image of an object before it is picked up and data representative of the distortion amount is stored in a distortion measuring unit. Addresses of pixels in the collected image, which correspond to the pixel addresses for storing the corrected image, are computed by an interpolating operation using the distortion data, and intensities of the pixels at the computed pixel addresses are computed, by the interpolating operation, from the pixel intensities in the collected image data.

Abstract: In a method of manufacturing silica-free, interconnected porous ceramics, use is made of ceramic material powder which exhibits an expansion phenomenon due to reaction when fired; the ceramic material powder is mixed with binder; the mixture is molded; thereafter the molded mixture is fired and, during the firing process, held for a predetermined period of time at a predetermined temperature which is not lower than a temperature at which maximum expansion occurs in the expansion phenomenon but lower than a temperature at which the firing of the molded mixture is completed; and the firing process is stopped after a lapse of the predetermined period of time.

Abstract: An ultrasonic imaging apparatus has an ultrasonic transducer comprising an array of ultrasonic transducer elements which are divided into a transmission group and a reception group in an array direction. The transmission group transmits ultrasonic beams. The reception group receives ultrasonic beams crossing those transmitted by transmission group. When beams are transmitted to an object and reflected from the object are received, the velocity of the sound propagating through the object is measured. The voltage of drive pulses and that of echo pulses are detected, and the voltage dependency parameter of the drive pulses is calculated from the detected voltages. After each cycle of beam transmission/reception, the active positions of the transmission group and reception group are moved in the lengthwise direction of the array of transducer elements.

Abstract: A method and apparatus for examining a subject by applying radiation to the subject in synchronism with a cardiac beat phase of the subject, wherein a digital subtraction is carried out between a mask image and a contrast image derived from the detected radiation which passed through the subject. Cardiac beat phase is detected by measuring the time-elapse characteristic data of image concentration. Based on the measuring time-elapse characteristic data, amplitude and phase images of the cardiac are calculated and displayed.

Abstract: In an angiography, it is desirable to improve the resolution of the subtraction image. One approach to this requirement is attempted to subtract a series of the optical image by an optical subtraction method. A diagnostic apparatus includes at least first and second electrooptic devices, into which first and second optical images originated from a plurality of optical images are exposed so as to be stored therein, and thereafter from which those first and second optical images are optically read out, and an optical image subtraction device in which the above-mentioned first and second optical images are optically subtracted.

Abstract: In an angiographic apparatus, operation timings of an entire system, e.g., an X-ray generator, an X-ray detector, a transmission image processor, and an injector for X-ray contrast medium are controlled in synchronism with cardiac beat waves of a biological object.

Abstract: A diagnostic X-ray apparatus emitting pulsed X-ray radiation and including a processor for performing digital X-ray subtraction imaging which includes digitization of the video signals from an image intensifier-TV chain, digital subtraction and reconversion of the resultant digital difference video signals to analog signals, wherein the subtraction is performed for two successive difference images with multiplying each image by the respective weighting factor in a predetermined image sequence. The resulting difference image is compared with a standard and reduced to at least the standard before display.

Abstract: A diagnostic X-ray apparatus emitting a pulsed X-ray radiation and including a processor for performing digital X-ray subtraction imaging which includes digitization of the video signals from an image intensifier--TV chain, digital subtraction and reconversion of the resultant digital difference video signals to analog signals, wherein the subtraction is performed for selected television images by ignoring a predetermined number of preceding television images in a predetermined image sequence.

Abstract: There is disclosed a dry, stabilized oral pharmaceutical formulation containing a prostaglandin E group prepared from a lyophilized composition comprising a prostaglandin E group and at least a member selected from the group consisting of a thiol compound, dextrin, dextran, a lower alkyl cellulose, and a water-soluble salt of deoxycholic acid.

Abstract: There is provided a process of preparing a prostaglandin E group-containing formulation by adding to a prostaglandin E group at least one additive selected from the group consisting of thiol compound, a water-soluble high molecular weight compound, and a water-soluble salt of deoxycholic acid and then subjecting the mixture to lyophilization.

Abstract: A dried and stabilized prostaglandin composition containing a prostaglandin E group compound with calcium lactate and/or amylopectin, and a stabilized pharmaceutical preparation for practical administration prepared from the said composition.

Abstract: There is provided a process of preparing a prostaglandin E group-containing formulation by adding to a prostaglandin E group at least one additive selected from the group consisting of a thiol compound, a water soluble high molecular weight compound and a water-soluble salt of deoxycholic acid and then subjecting the mixture to lyophilization.