摘要:
To reduce the cost while maintaining the real time environment in receiving ultrasonic waves in an ultrasonic receiving apparatus which is capable of reducing changes in detection sensitivity due to environmental changes in the ultrasonic detecting element. The ultrasonic receiving apparatus comprises a light source for generating broadband light, an ultrasonic detecting element including an ultrasonic sensing portion that expands and contracts in response to a received ultrasonic wave and has optical reflectance that changes in accordance with expansion and contraction thereby performing intensity modulation on the light, spectrum-separating means for spectrum-separating the light, first photo-detecting means having a plurality of photoelectric conversion elements for detecting the light for plural wavelength components, and second photo-detecting means for detecting a selected wavelength component included in the light on the basis of a detection result of the first photo-detecting means.
摘要:
A linear stimulating ray source produces stimulating rays and linearly irradiates them to a portion of a stimulable phosphor sheet, on which a radiation image has been stored. A photoelectric read-out system divides light, which is emitted from the portion of a front surface of the stimulable phosphor sheet exposed to the stimulating rays and/or the portion of a back surface of the stimulable phosphor sheet corresponding to the portion of the front surface exposed to the stimulating rays, into picture elements along a length direction of the portion exposed to the stimulating rays, and photoelectrically reads out the divided picture elements by arraying them in a two-dimensional form. A scanning system moves the stimulable phosphor sheet with respect to the linear stimulating ray source and the photoelectric read-out system and in a direction, which is approximately normal to the length direction of the portion exposed to the stimulating rays.
摘要:
The method of gradation correction of input image data to be displayed on an image display apparatus converts to logarithmic data first characteristic values which represent the display characteristics inherent in the image display apparatus and second characteristic values which represent the desired gradation to be eventually realized with the image display apparatus, respectively, and optionally interpolating both the logarithmic data, constructs a gradation correction table based on both the logarithmic data of the first characteristic values and the logarithmic data of the second characteristic values and performs gradation correction on the input image data to the image display apparatus using the gradation correction table. The image display system displays on the image display apparatus the thus corrected image data on which the gradation correction is performed by implementing the method. The method and system are capable of producing a smooth enough correction LUT (look-up table) to allow gradation correction to be performed in such a way that the image display apparatus will eventually provide the intended display characteristics. Therefore, the system can display a high quality image that has no defects such as artifacts.
摘要:
An ultrasonic probe for detecting ultrasonic waves in a two-dimensional manner without necessity of electric-wiring works to a large number of very fine elements and without increasing of crosstalk and electric impedance. The ultrasonic probe is equipped with an ultrasonic transmitting function and can be provided in low cost. The ultrasonic probe includes an ultrasonic detecting element having a reception plane capable of receiving ultrasonic waves, for modulating light on the basis of ultrasonic waves applied to respective positions of the reception plane, and at least one ultrasonic transmitting element for transmitting ultrasonic waves.
摘要:
A method of generating three-dimensional image data by transmitting beams to an object from a transmitting part and detecting beams reflected from the object by using a two-dimensional sensor array having a plurality of sensors. The method includes the steps of: (a) storing detection signals obtained by the plurality of sensors during a predetermined period after transmission; (b) obtaining image data about at least one measured point included in the object on the basis of a detection signal output from at least one of the plurality of sensors at a time point obtained from relationship between a distance from the transmission part to at least one of the plurality of sensors through the at least one measured point and a transmission velocity of the beams passing through the object; and (c) obtaining image data by repeating step (b) while changing the time point.
摘要:
A gradation converting process is carried out on an image signal and in accordance with a predetermined gradation converting table, and a visible image, which is represented by an image signal having been obtained from the gradation converting process, is displayed on an image displaying device. In the gradation converting process, the amount of depletion of luminance of the image displaying device is detected, and the gradation converting table is corrected in accordance with the detected amount of depletion of luminance such that the depletion of luminance of the image displaying device may be compensated for. A visible image having good image quality is thereby displayed on the image displaying device regardless of depletion of luminance of the image displaying device.
摘要:
When image data comprising data at a plurality of levels, each having a different resolution, density resolution, and reproduced image quality, are transferred to a terminal, image data at a level appropriate for the terminal are easily transferred. At the time transfer of image data is requested by a terminal, if the name of the user of the terminal is input, transfer request information and name information is transferred to an image server via a network. In the image server, data at a level appropriate for the user are specified based on the name information and the data are transferred to the terminal which has requested the transfer. For example, when an image reading terminal requests image transfer, highest level data are transferred, while data at a level lower than the highest are transferred when a reference terminal requests the transfer.
摘要:
An ultrasonic receiving apparatus is equipped with such a condition capable of obtaining superior sensitivities. This ultrasonic receiving apparatus includes: an ultrasonic detecting element for modulating light on the basis of ultrasonic waves applied thereto, the ultrasonic detecting element including an ultrasonic sensible portion having a length not larger than ¾ of a wavelength of ultrasonic waves propagated therethrough; and a photodetector for detecting light output from the ultrasonic detecting element.
摘要:
The quality control system includes a network, a plurality of medical diagnostic apparatuses which exist on the network and have respective histories of evaluation results on specific items regarding quality of individual medical diagnostic apparatuses and a control device which exists on the network, stores all of the histories of the evaluation results that individual medical diagnostic apparatuses hold and controls them centrally. By this unified quality control system, quality control of a plurality of medical diagnostic apparatuses connected to each other on the network can efficiently be performed.
摘要:
An ultrasonic receiving apparatus capable of reducing changes in detection sensitivity due to environmental changes such as temperature and the variations of detection sensitivity depending upon the positions in the ultrasonic detecting element. The ultrasonic receiving apparatus includes: a light source for generating broadband light; an ultrasonic detecting element including an ultrasonic sensing portion which is expanded and contracted by a received ultrasonic wave to change an optical reflectance thereof in accordance with expansion and contraction thereby performing intensity modulation of the light generated by the light source; a spectrum separating unit for spectrum-separating the light intensity-modulated by the ultrasonic detecting element; and photodetector having a plurality of photoelectric converting elements for detecting the light spectrum-separated by the spectrum separating unit for each of plural wavelength components.