Method of energy subtraction for radiation image and apparatus f

Details Method of energy subtraction for radiation image and apparatus f Method of energy subtraction for radiation image and apparatus f

1991-10-11

1993-08-17

Fields, Carolyn E.

Radiant energy

Source with recording detector

Using a stimulable phosphor

G03B 4202, G01N 2304

Patent

active

052371760

ABSTRACT:
A plurality of radiation images of an object is recorded on a plurality of recording sheets by exposing the recording sheets to radiations which have different energy distributions and have passed through the object. The plurality of radiation images are read out and a plurality of image signals which respectively represent the plurality of radiation images are obtained. A correction formula according to which correction of one or more of the image signals for superposing the radiation images represented by the respective image signals one on another is effected for each picture element is obtained and subtraction processing is effected for each picture element while the aforesaid correction is effected for each picture element according to the correction formula.
In other words, the steps of correction, superposition and subtraction are performed consecutively and on a picture element by picture element basis.

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