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 employing a stimulable phosphor sheet for the purpose of obtaining information on the one dimensional location of radioactively labeled substances distributed in at least one dimensional direction on a support medium, in the form of a symbol, numeral or combination thereof, including the steps of:(1) determining a one dimensional scanning line for signal processing; and(2) detecting sampling points on said scanning line,the process being applied to digital signals corresponding to an autoradiograph having the locational information on the radioactively labeled substances, the digital signals being obtained from stimulable phosphor sheet.

Abstract: A method and apparatus for image processing on a radiation image which may be a conventional radiographic image on X-ray film or a radiation image which is stored in a stimulable phosphor and read out therefrom. The radiation image is scanned by a light beam or stimulating rays and an image signal is obtained by use of a photodetector. The image signal is subjected to a frequency processing by use of an unsharp masking process. The unsharp mask signal (Sus) is used for conducting an operation ofSorg+.beta.(Sorg-Sus)to obtain an image-processed signal S, wherein Sorg is a digital signal for each picture element of the scanned image and .beta. is a frequency emphasizing coefficient. The median of a group of digital signals in an unsharp mask of a predetermined size is employed.

Abstract: Markers for providing reference points or lines are recorded together with radiation images on stimulable phosphor sheets in a position fixed with respect to the radiation images. The stimulable phosphor sheets are scanned with stimulating rays, and the spatial coordinates of reference points or lines are detected from digital data of the images detected from light emitted from the stimulable phosphor sheets. Rotation and shift among the radiation images are calculated based on the reference points or lines. One of the radiation images is rotated on the digital data when positional deviation exists and moved on the digital data when positional deviation exists. Subtraction of the image data is then conducted among the corresponding picture elements of the radiation images to extract an image of a specific portion of the radiation images.

Abstract: In a system for compressing radiation image signals, code tables for use in entropy encoding for signal compression are created and classified in accordance with combinations of human body portions of radiation images with image recording conditions thereof. The optimal table is selected from the classified tables in accordance with the combination of the human body portion of the radiation image with the image recording conditions thereof which are inputted from a keyboard. Radiation image signals obtained by reading out the radiation image are compressed by use of the optimal table, thereby quickly achieving efficient signal compression.

Abstract: Markers for providing reference points or lines are recorded together with radiation images in stimulable phosphor sheets in a position fixed with respect to the radiation images. The stimulable phosphor sheets are scanned with stimulating rays, and the spatial coordinates of the reference points or lines are detected from light emitted from the stimulable phosphor sheets. The stimulable phosphor sheets are moved with respect to scanning lines of stimulating rays based on the detected spatial coordinates to adjust the spatial coordinates to a spatial coordinate predetermined with respect to the scanning lines of stimulating rays. Then, the radiation images are read out.

Abstract: A signal detecting method in autoradiography, which is applied to an autoradiography having locational information on radioactively labeled substances such as radioactively labeled biopolymers distributed one-dimensionally, being recorded on a stimulable phosphor sheet as a radiation energy-stored image, which comprises steps of:(1) preliminarily scanning a part of the stimulable phosphor sheet with an electromagnetic wave to release a portion of the radiation energy as stimulated emission and detecting the stimulated emission 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 stimulable phosphor sheet with an electromagnetic wave along said one-dimensional distribution direction to release the radiation energy as stimulated emission and detecting the stimulated emission, to obtain the locational information on the radioactively labeled substances as a digital signal.

Abstract: Markers having a shape defining an edge portion of a radiation image area are recorded together with radiation images in stimulable phosphor sheets in a position fixed with respect to the radiation images. The stimulable phosphor sheets are scanned with stimulating rays, and the edge portion defined by the markers is photoelectrically detected. Read-out of the image signals of the radiation images is conducted by using the detected signal of the edge portion as the read-out synchronizing signal, thereby to obtain the image signals corrected for deviations in position among the radiation images.