Method for converting radiographic image, radiation energy storage panel having stimulable phosphor-containing layer and alkali halide phosphor

A radiation energy storage panel having a stimulable phosphor-containing layer characterized in that said stimulable phosphor is represented by the following formula:

• (M.sub.1-.chi. xM.sup.I.sub..chi.)X.aM.sup.II X'.sub.2.bM.sup.III X".sub.3 :dB
• wherein M represents either Cs or Rb;
• M.sup.I represents at least one of alkaline metals selected from the group consisting of Li, Na, K, Rb and Cs;
• M.sup.II represents at least one divalent metal selected from the group consisting of Be, Mg, Ca, Sr, Ba, Zn, Cd, Cu and Ni;
• M.sup.III represents at least one metal selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Cd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Al, Ga and In;
• B i.s an activator which is at least one metal selected from the group consisting of Eu, Tb, Ce, Tm, Dy, Pr, Ho, Nd, Yb, Er, Gd, Lu, Sm, Y, Tl, Na, Ag, Cu, Mg, Pb, Bi, Mn and In;
• X, X' and X" each are the same or different and represent a halogen atom selected from F, Cl, Br and I;
• provided that all of the X' atoms are the same halogen atoms;
• and .chi., a, b and d are numerals in the range of 0.ltoreq..chi..ltoreq.1, 0.ltoreq.a.ltoreq.1, 0.ltoreq.b.ltoreq.0.5 and 0<d.ltoreq.0.2, respectively.

A method of converting a radiographic image which comprises the steps of:

• (a) storing radiation energy-corresponding to a radiographic image in a stimulable phosphor of a panel comprising a stimulable phosphor-containing layer,
• (b) scanning said layer with a stimulating ray to release said stored energy as a fluorescence, and
• (c) detecting said fluorescence to form an image, wherein said stimulable phosphor is represented by the following formula;
• (M.sub.1-.chi..M.sup.I.sub..chi.)X.aM.sup.II X'.sub.2.bM.sup.III X".sub.3 :dB
• wherein M represents either Cs or Rb;
• M.sup.I represents at least one of alkaline metals selected from the group consisting of Li, Na, K, Rb and Cs;
• M.sup.II represents at least one divalent metal selected from the group consisting of Be, Mg, Ca, Sr, Ba, Zn, Cd, Cu and Ni;
• M.sup.III represents at least one metal selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Cd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Al, Ga and In;
• B is an activator which is at least one metal selected from the group consisting of Eu, Tb, Ce, Tm, Dy, Pr, Ho, Nd, Yb, Er, Gd, Lu, Sm, Y, Tl, Na, Ag, Cu, Mg, Pb, Bi, Mn and In;
• X, X' and X" each are the same or different and represent a halogen atom selected from F, Cl, Br and I;
• provided that all of the X'atoms are different halogen atoms;
• and x, a, b and d are numerals in the range of 0.ltoreq.x.ltoreq.1, 0.ltoreq.a.ltoreq.0.4, 0.ltoreq.b.ltoreq.0.5 and 0<d.ltoreq.0.2, respectively.

A radiation energy storage panels having a stimulable phosphor-containing layer wherein said stimulable phosphor is represented by the following formula:

• (M.sub.1-.chi..M.sup.I.sub..chi.)X.aM.sup.II X'.sub.2.bM.sup.III X".sub.3 :dB
• wherein M represents either Cs or Rb;
• M.sup.I represents at least one of alkaline metals selected from the group consisting of Li, Na, K, Rb and Cs;
• M.sup.II represents at least one divalent metal selected from the group consisting of Be, Mg, Ca, Sr, Ba, Zn, Cd, Cu and Ni;
• M.sup.III represents at least one metal selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Cd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Al, Ga and In;
• B is an activator which is at least one metal selected from the group consisting of Eu, Tb, Ce, Tm, Dy, Pr, Ho, Nd, Yb, Er, Gd, Lu, Sm, Y, Tl, Na, Ag, Cu, Mg, Pb, Bi, Mn and In;
• X, X' and X" each are the same or different and represent a halogen atom selected from F, Cl, Br and I;
• provided that all of the X' atoms are different halogen atoms;
• and x, a, b and d are numerals in the range of 0.ltoreq.x.ltoreq.1, 0.ltoreq.a.ltoreq.0.4, 0.ltoreq.b.ltoreq.0.5 and 0<d.ltoreq.0.2, respectively.