Radiation image read-out method and apparatus

Details Radiation image read-out method and apparatus Radiation image read-out method and apparatus

1987-02-19

1989-02-14

Howell, Janice A.

Radiant energy

Automatic/serial detection of similar sources

36441326, 382 22, G01N 2304

Patent

active

048048429

ABSTRACT:
In a radiation image read-out system wherein a radiation image recorded on a recording medium through an irradiation field stop is read out and the read-out image signals are subjected to an image processing, the image processing conditions are determined or adjusted based on the histogram of the image signals. In a radiation image read-out system wherein a radiation image is recorded on a recording medium through an irradiation field stop and preliminary read-out is conducted prior to final read-out, and the image signals read out by the final read-out are subjected to an image processing, final read-out conditions and/or image processing conditions are determined or adjusted based on the histogram of the image signals obtained by the preliminary read-out. In both cases, prospective edge point signals, which are considered to be signals representing edge portions of an irradiation field on the stimulable phosphor sheet, are detected from the image signals. A region of a level lower than a characteristic value representing the prospective edge point signals is removed from the histogram, and the final read-out conditions and/or the image processing conditions are adjusted based on the histogram outside of the lower level region.

REFERENCES:
patent: 4258264 (1981-03-01), Kotera et al.
patent: 4346295 (1982-08-01), Tanaka et al.
patent: 4538227 (1985-08-01), Toraichi et al.
patent: 4620097 (1986-10-01), Tanaka et al.

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