Method of adjusting radiation image read-out conditions and imag

Details Method of adjusting radiation image read-out conditions and imag Method of adjusting radiation image read-out conditions and imag

1989-01-19

1990-08-28

Howell, Janice A.

Radiant energy

Automatic/serial detection of similar sources

2504841, G01N 2304

Patent

active

049528076

ABSTRACT:
In a method of adjusting read-out conditions for final read-out of a radiation image or for adjusting image processing conditions of a radiation image stored in a stimulable phosphor sheet by limiting the irradiation field. In adjusting read-out conditions for final read-out, image information obtained by preliminary read-out is subjected to a threshold value processing to detect a background portion inside of the irradiation field. The image information inside of the irradiation field constituted by the background portion and an object image portion surrounded by the background portion is selected from the image information obtained by the preliminary read-out. The read-out conditions in the final read-out adjusted on the basis of the selected image information. In adjusting image processing conditions, image information obtained by exposing the stimulable phosphor sheet to emit light in proportion to the stored radiation and photoelectrically detecting the emitted light is subjected to a threshold value processing to detect a background portion inside of the irradiation field. The image information inside of the irradiation field constituted by the background portion and an object portion surrounded by the backgroud portion is selected from the obtained image information. The image processing conditions for use in an image processing of the radiation image information are adjusted on the basis of the selected image information.

REFERENCES:
patent: 3576980 (1971-05-01), Doyle
patent: 3585592 (1971-06-01), Kiji
patent: 4284889 (1981-08-01), Kato et al.
patent: 4310886 (1982-01-01), Kato et al.
patent: 4334274 (1982-06-01), Agui et al.
patent: 4498006 (1985-02-01), Horikawa et al.

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