Radiation image recording and reproducing method

Details Radiation image recording and reproducing method Radiation image recording and reproducing method

1985-01-28

1990-06-05

Howell, Janice A.

Radiant energy

Invisible radiation responsive nonelectric signalling

Luminescent device

2523016P, G01T 1202, C09K 11477

Patent

active

049316524

ABSTRACT:
A radiation image recording and reproducing method comprising steps of: (i) causing a divalent europium activated alkaline earth metal halophosphate phosphor having the formula (I):
M.sup.II.sub.2 OP.sub.4 X:xEu.sup.2+ (I)
in which M.sup.II is at least one alkaline earth metal selected from the group consisting of Ca, Sr and Ba; X is at least one halogen selected from the group consisting of Cl, Br and I; and x is a number satisfying the condition of 0<x.ltoreq.0.2, to absorb a radiation having passed through an object or having radiated from an object; (ii) exciting said phosphor with an electromagnetic wave having a wavelength within the range of 500-800 nm to release the radiation energy stored therein as light emission; and (iii) detecting the emitted light.

REFERENCES:
patent: 4261854 (1981-04-01), Kotera et al.
patent: 4353808 (1982-10-01), Tanimizu et al.
An Introduction to Luminescence of Solids by H. Leverenz (Dover Pub.), 1968, Appendix I.
"X-Ray Storage Prop. of IR Storage Phosphor . . . " Berg et al., Apr. 1947, pp. 343-347.

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