Radiation imaging device with photostimulable phosphor

A radiation imaging device comprising:

• a photostimulable phosphor which emits fluorescence in an ultraviolet or blue colour wavelength region when those parts which have been exposed to radiation are excited by visible or infra-red light, and which is an oxide glass containing at most 10 mole % of at least one of Ce.sup.3+ and Eu.sup.2+, and as cations 30-99 mole % of at least one of Si.sup.4+, B.sup.3+ and P.sup.5+, 0-70 mole % of at least one of Li.sup.+, Na.sup.+, K.sup.+, Rb.sup.+, Cs.sup.+ and Tl.sup.+, 0-70 mole % of at least one of Mg.sup.2+, Ca.sup.2+, Sr.sup.2+, Ba.sup.2+, Cd.sup.2+, Pb.sup.2+ and Zn.sup.2+, 0-30 mole % of Al.sup.3+, and 0-40 mole % of at least one of Y.sup.3+, Sc.sup.3+, Ga.sup.3+, In.sup.3 +, Bi.sup.3 + and Ln.sup.3+ (wherein Ln is a rare earth element other than Ce), wherein the percentages are based on the total of all cations;
• and
• a radiation source adapted to irradiate said photostimulable phosphor whereby when said irradiated photostimulable phosphor is excited with visible or infra-red light, said irradiated photostimulable phosphor emits fluorescence in an ultraviolet or blue colour wavelength region.

A radiation imaging device comprising:

• a photostimulable phosphor which emits fluorescence in an ultraviolet or blue colour wavelength region when those parts which have been exposed to radiation are excited by visible or infrared light, and which is a halide glass containing at most 10 mole % of at least one of Ce.sup.3+ and Eu.sup.2+, and as cations, 10-60 mole % of Al.sup.3+, 8-70 mole % of at least one of Mg.sup.2+, Ca.sup.2+, Sr.sup.2+ and Ba.sup.2+, 0-30 mole % of at least one of Y.sup.3+ and Ln.sup.3+ (wherein Ln is a rare earth element other than Ce), 0-20 mole % of Hf.sup.4+, and 0-20 mole % of at least one of Li.sup.+, Na.sup.+ and K.sup.+, wherein the percentages are based on the total of all cations, and as anions 0-20 mole % of Cl.sup.- and 80-100 mole % of F.sup.-, wherein the percentages are based on the total of all anions;
• and
• a radiation source adapted to irradiate said photostimulable phosphor whereby when said irradiated photostimulable phosphor is excited with visible or infra-red light, said irradiated photostimulable phosphor emits fluorescence in an ultraviolet or blue colour wavelength region.

A radiation imaging device comprising:

• a photostimulable phosphor which emits fluorescence in an ultraviolet or blue colour wavelength region when those parts which have been exposed to radiation are excited by visible or infra-red light, and which is a halogen phosphate glass containing at most 10 mole % of at least one of Ce.sup.3+ and Eu.sup.2+, and as cations 10-60 mole % of Al.sup.3+, 0.1-80 mole % of P.sup.5+, 8-70 mole % of at least one of Mg.sup.2+, Ca.sup.2+, Sr.sup.2+ and Ba.sup.2+, 0-30 mole % of at least one of Y.sup.3+ and Ln.sup.3+ (wherein Ln is a rare earth element other than Ce), 0-20 mole % of Hf.sup.4+, and 0-20 mole % of at least one of Li.sup.+, Na.sup.+ and K.sup.+, wherein the percentages are based on the total of all cations, and as anions 1-95 mole % of O.sup.2-, 0-20 mole % of Cl.sup.- and 5-99 mole % of F.sup.-, wherein the percentages are based on the total of all anions;
• and
• a radiation source adapted to irradiate said photostimulable phosphor whereby when said irradiated photostimulable phosphor is excited with visible or infra-red light, said irradiated photostimulable phosphor emits fluorescence in an ultraviolet or blue colour wavelength region.