Abstract: An image reading system includes clients which output image data as a visible image. Individual diagnoses obtained on the visible images are input through the client. A management client outputs result of examination obtained from the individual diagnoses. A server is provided with an image memory and a result memory connected to the clients and the management client by way of a network. The image memory stores image data and the result memory stores results of examination obtained on the individual diagnoses. Each client receives the image data from the server by way of a network, outputs the image data and sends individual diagnoses input for the image data to the server by way of the network. The result memory stores results of examination obtained on the individual diagnoses sent from the respective clients, and the management client outputs the result of examination received from the server.

Abstract: An image filing apparatus comprises an irreversible signal compression device for carrying out irreversible signal compression processing on an original image signal, which is made up of a series of image signal components representing an original image, and thereby generating an irreversibly compressed image signal. The irreversibly compressed image signal is stored on a first storage device. A difference operation device subtracts the image signal components of the original image signal and the irreversibly compressed image signal from each other which represent corresponding picture elements in the original image and the image represented by the irreversibly compressed image signal. A difference image signal is thereby generated which represents a difference image corresponding to the differences between the original image signal and the irreversibly compressed image signal.

Abstract: A method for adjusting conditions comprises the steps of, when a radiation image of a specific object is recorded and read out, investigating whether recording and read-out operations were or were not carried out in the past for the same object as the specific object. When recording and read-out operations were carried out in the past for the same object as the specific object, image recording conditions for the specific object are adjusted such that they coincide with those under which the recording operation was carried out for the same object as the specific object.

Abstract: A medical image displaying apparatus is provided with a display device, which reproduces a visible image from an image signal made up of a series of image signal components representing a medical image, and which displays the visible image. A conversion device receives a plurality of primary image signal components representing a medical image, each of the primary image signal components being composed of n bits, and converts them into a plurality of secondary image signal components representing an image with a desired gradation and having been compensated for gradation characteristics of the display device. Each of the secondary image signal components is composed of n+k bits, where k>0. The display device reproduces a visible image from the plurality of the secondary image signal components and displays it.

Abstract: In a radiation image processing apparatus, signal processing for determining the shape and location of an irradiation field, adjusting read-out conditions for a final readout from a preliminary read-out image signal, adjusting image processing conditions, and/or detecting an abnormal pattern is carried out on an image signal representing a radiation image by using a neural network. After the neural network, the learning operations of which have been carried out, is incorporated into the radiation image processing apparatus, modifying information is entered from an input device into the neural network. The modifying information is used to modify the signal processing carried out by the neural network and thereby to carry out re-learning operations of the neural network.

Abstract: In a radiation image processing method, unsharp mask signals Sus.k are calculated by averaging original image signals detected within predetermined ranges surrounding each scanning point on an image-recorded stimulable phosphor, and at least a single attenuation coefficient .beta.l among attenuation coefficients .beta.k corresponding to the unsharp mask signals Sus.k is adjusted to be a constant within the range of 0<.beta.l wherein .beta.l.noteq.1. An operation represented by a formula ##EQU1## where Sb1 and Sb2 each denote the original image signal or an image signal obtained by intermediate processing of the original image signal, and S' denotes an image signal obtained by the operation processing is carried out by use of the attenuation coefficient .beta.l, whereby spatial frequency components above the spatial frequency component which the unsharp mask signal Sus.l corresponding to the attenuation coefficient .beta.l has are attenuated.

Abstract: A radiation image recording and reproducing system comprises a recording section, a read-out section, a reproducing section, and a signal format converting section. The signal format converting section comprises a first buffer memory for storing the ID information giving specifics about a radiation image, which ID information is received from an external apparatus and has a first signal format, and a second buffer memory for storing the ID information, which has a second signal format adapted to the radiation image recording and reproducing system and into which the ID information having the first signal format was converted. A conversion table memory stores a conversion table.

Abstract: An image signal representing radiation images is detected from a recording medium on which the radiation images have been recorded in a subdivision pattern. The whole image recording area of the recording medium is divided into four regions which have the same shape and the same size and which are vertically and horizontally adjacent to one another. Calculations are made from the image signal in order to find characteristic amounts which represent resemblances in image between the divided regions which are vertically adjacent to each other and between the divided regions which are horizontally adjacent to each other. The subdivision pattern of the radiation images is determined by judging that the divided regions which are found as resembling each other in image are the subdivisions into which the whole recording area of the recording medium was divided when the radiation images were recorded thereon.

Abstract: A radiation image read-out apparatus comprises a preliminary read-out device, a final read-out device, an image processor, and a condition adjuster. The condition adjuster comprises an operating device for determining the read-out conditions for the final readout and/or the image processing conditions and feeding the information about them into the final read-out device and/or the image processor. From a first input device, information about a mode selected from among several modes of adjusting the read-out conditions and/or the image processing conditions is fed into the operating device. In cases where a region selecting mode is designated, an image represented by a preliminary read-out image signal is displayed.

Abstract: A radiation image read-out apparatus comprises a preliminary read-out device, a final read-out device, an image processor, and a condition adjuster. The condition adjuster is constituted of first and second operating sections for calculating, from a preliminary read-out image signal, a first read-out condition and/or a first image processing condition, and a second read-out condition and/or a second image processing condition. Both the first and second conditions are displayed for evaluation of the reliability thereof. A change-over section selects a mode wherein the first read-out condition is fed into the final read-out device and/or the first image processing condition is fed into the image processor, and a mode wherein the second read-out condition is fed into the final read-out device and/or the second image processing condition is fed into the image processor.

Abstract: In a system for displaying a radiation image by scanning a recording medium carrying a radiation image stored thereon and converting the image into an electrical signal, an unsharp mask signal Sus corresponding to a super-low frequency at each scanning point is detected, and an operation, expressed as S'=Sorg+.beta.(Sorg-Sus) where Sorg denotes an original image signal detected from the recording medium and .beta. denotes an emphasis coefficient, is conducted to perform an unsharp masking process for emphasizing frequency components above the super-low frequency. The unsharp mask signal Sus and/or the emphasis coefficient .beta. is continuously changed to display the image as a moving image.

Abstract: A radiation image read-out apparatus comprises a system for emitting stimulating rays to a stimulable phosphor sheet carrying a radiation image of an object stored thereon by exposure to a radiation passing through the object, a photodetector for detecting light emitted by the stimulable phosphor sheet when it is exposed to stimulating rays, an amplifier for amplifying a read-out image signal generated by the photodectector, and A/D converter for digitizing the output of the amplifier, and a predictor for predicting the scattered radiation amount stored on the stimulable phosphor sheet. An operation circuit is positioned between the amplifier and the photodetector for subtracting a signal component representing the scattered radiation amount from the read-out image signal on the basis of the scattered radiation amount predicted by the scattered radiation amount predictor.

Abstract: A signal processing method in autoradiography for determination of the base sequence of DNA or a DNA fragment, employing groups of radioactively labeled base specific cleavage products or mixtures thereof obtained by specifically cleaving the DNA or DNA fragment labeled with a radioactive element and resolved one-dimensionally in parallel relation to each other to form resolved rows on a support medium. An autograph is obtained having locational information on groups of radioactively labeled cleavage products contained in the rows on the support medium. An electrical digital signal corresponding to the autoradiograph are generated by recording and reproducing a radiation image stored in a stimulable phosphor sheet. Sampling points in each resolved row of the digital signal are next detected. Reference sampling points are then determined in a plurality of reference rows which are either directly provided on the support medium and/or synthesized from certain resolved rows.

Abstract: A signal detecting method in autoradiography, which is applied to an autoradiograph having locational information on radioactively labeled substances such as radioactively labeled biopolymers distributed one-dimensionally, being recorded on a radiosensitive material as a visible image,which comprises steps of:(1) preliminarily scanning a part of the radiosensitive material with a light and photoelectrically reading out a portion of the visualized autoradiograph to give an electric signal, to which a signal processing is applied, to determine one-dimensional distribution direction of the radioactively labeled substances; and(2) finally scanning the radiosensitive material with a light along said one-dimensional distribution direction and photoelectrically reading out the visualized autoradiograph, to obtain the locational information on the radioactively labeled substances as a digital signal.

Abstract: A signal processing method in autoradiography for determining base sequence of DNA or DNA fragment, employing groups of base-specific synthetic products which are complementary to the DNA or DNA fragment and a labeled with a radioactive element, said groups being resolved one-dimensionally in parallel relation to each other to form resolved rows on a support medium,which comprises a process including:(1) determining on each of the resolved rows a scanning line for signal processing;(2) detecting on each of the resolved rows sampling points on said scanning line; and(3) comparing and identifying the positions of said sampling points on the scanning lines among the resolved rows to obtain locational information on guanine, ademine, thymine and cytosine;said process being applied to digital signals corresponding to an autoradiograph having the locational information on the radioactively labeled synthetic products, said digital signals being obtained by the use of a stimulable phosphor sheet or by the use of a ra

Abstract: A signal processing method in autoradiography for determination of the base sequence of DNA or a DNA fragment, employing groups of radioactively labeled base specific cleavage products or mixtures thereof obtained by specifically cleaving the DNA or DNA fragment labeled with a radioactive element and resolved one-dimensionally in parallel relation to each other to form resolved rows on a support medium. An autograph is obtained having locational information on groups of radioactively labeled cleavage products contained in the rows on the support medium. An electrical digital signal corresponding to the autoradiograph is then generated. Sampling points in each resolved row of the digital signal are next detected. Reference sampling points are then determined in a plurality of reference rows which are either directly provided on resolved row adjacent to the reference row to identify sampling points in adjacent resolved rows.

Abstract: A signal processing method in autoradiography employing a radiosensitive material for the purpose of obtaining information on one dimensional location of radioactively labeled substances distributed in at least one dimensional direction on a support medium, in the form of symbol, numeral or combination thereof, comprising the steps of obtaining a digital signal corresponding to the autoradiograph on a radiosensitive material, by exposing said radiosensitive material to radiation emitted by said radioactively labeled substances on the support medium determining one dimensional scanning line relative to said digital signal; and detecting sampling points on said scanning line, comprising and identifying the positions of said sampling points detected on said scanning line among resolved rows for determining the base sequence of labeled substances.

Abstract: A signal processing method in autoradiography for obtaining information on the one dimensional location of radioactively labeled substances in a sample where the substances of the sample are distributed in at least one row on a support medium where the information is in the form of symbols, numerals or a combination thereof.

Abstract: A signal processing method in autoradiography for determines of the base sequence of DNA or a DNA fragment, by employing groups of radioactively labeled base specific cleavage products or mixtures thereof obtained by specifically cleaving the DNA or DNA fragment labeled with a radioactive element and resolved one-dimensionally in parallel relation to each other to form resolved rows on a support medium. An autograph is obtained having locational information on groups of radioactively labeled cleavage products contained in the rows on the support medium. An electrical digital signal corresponding to the autoradiograph is then generated. Sampling points in each resolved row of the digital signal are next detected. Reference sampling points are then determined in a plurality of reference rows which are either directly provided on the support medium and/or synthesized from certain resolved rows.

Abstract: A signal processing method in autoradiography for determination of the base sequence of DNA or a DNA fragment, employing groups of radioactively labeled base specific cleavage products or mixtures thereof obtained by specifically cleaving the DNA or DNA fragment labeled with a radioactive element and resolved one-dimensionally in parallel relation to each other to form resolved rows on a support medium. An autograph is obtained having locational information on groups of radioactively labeled cleavage products contained in the rows on the support medium. An electrical digital signal corresponding to the autoradiograph is then generated by recording and reproducing from a stimulable phosphor sheet the radiation energy stored therein. Sampling points in each resolved row of the digital signal are next detected. Reference sampling points are then determined in a plurality of reference rows which are either directly provided on the support medium and/or synthesized from certain resolved rows.