Radiation image conversion panel and preparation method thereof

Abstract

Disclosed is a radiation image conversion panel by a vapor deposition method, in which a variation coefficient of distribution of a maximum intensity in an X-ray diffraction pattern inside the stimulable phosphor layer on a plane of a stimulable phosphor layer is not more than 40%.

1 . A radiation image conversion panel having a stimulable phosphor layer containing a stimulable phosphor on a support member, wherein a variation coefficient of distribution of a first peak intensity representing a maximum intensity of an X-ray diffraction pattern inside the stimulable phosphor layer on a plane of the stimulable phosphor layer is not more than 40%.  
   
   
       2 . The radiation image conversion panel of  claim 1 , wherein distribution of the first peak intensity representing the maximum intensity in an X-ray diffraction pattern inside the stimulable phosphor layer on a plane of the stimulable phosphor layer is isotropic from a center toward an end of the plane of the stimulable phosphor layer.  
   
   
       3 . The radiation image conversion panel of  claim 1 , wherein the variation coefficient of the first peak intensity is not more than 30%.  
   
   
       4 . The radiation image conversion panel of  claim 1 , wherein the variation coefficient of the 1st peak intensity is not more than 20%.  
   
   
       5 . The radiation image conversion panel of  claim 1 , wherein the variation coefficient of the 1st peak intensity is not more than 10%.  
   
   
       6 . The radiation image conversion panel of  claim 1 , wherein index of a plane of the 1st peak is (x, 0, 0), wherein x is 1, 2 or 3.  
   
   
       7 . The radiation image conversion panel of  claim 6 , wherein index of a plane of the 1st peak is (x, 0, 0), wherein x is 2.  
   
   
       8 . The radiation image conversion panel of  claim 1 , wherein a distribution of packing factor of the stimulable phosphor layer on a plane of the stimulable phosphor layer is within +10%.  
   
   
       9 . The radiation image conversion panel of  claim 8 , wherein the distribution of packing factor of the stimulable phosphor layer exhibits an isotropic change from a center toward an end of the plane of the stimulable phosphor layer.  
   
   
       10 . The radiation image conversion panel of  claim 1 , wherein stimulable phosphor is composed of a basic material represented by the following formula (1):  
       M 1 X ·aM 2 X′·bM 3 X″:eA  formula (1)  
     wherein M 1  is at least one alkali metal atom selected from the group consisting of Li, Na, K, Rb and Cs; M 2  is at least one divalent metal atom selected from the group consisting of Be, Mg, Ca, Sr, Ba, Zn, Cd, Cu and Ni; M 3  is at least one trivalent metal atom selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Al, Ga and In; X, X′ and X″ are each a halogen atom selected from the group consisting of F, Cl, Br and I; A is a metal atom selected from the group consisting of Eu, Tb, In, Ce, Tm, Dy, Pr, Ho, Nd, Yb, Er, Gd, Lu, Sm, Y, Tl, Na, Ag, Cu and Mg; a, b and e are each  
     0≦a<0.5, 0≦b<0.5 and 0<e≦1.0.  
   
   
       11 . A manufacturing method of the radiation image conversion panel of  claim 1  using a vapor deposition apparatus comprising: 
 a vacuum container;    an evaporation source, arranged inside the vacuum container, for causing a support member to evaporate a stimulable phosphor; and    a support member rotating mechanism for supporting the support member and rotating it with respect to the evaporation source, thereby evaporating the stimulable phosphor from the evaporation source,    wherein the support member is supported and rotated by the support member rotating mechanism in which the stimulable phosphor evaporated from the evaporation source is deposited onto the support member to form a stimulable phosphor layer.    
   
   
       12 . A manufacturing method of the radiation image conversion panel having a stimulable phosphor layer containing a stimulable phosphor on a support member using a vapor deposition apparatus comprising: 
 a vacuum container;    an evaporation source, arranged inside the vacuum container, for causing a support member to evaporate a stimulable phosphor; and    a support member rotating mechanism for supporting the support member and rotating it with respect to the evaporation source, thereby evaporating the stimulable phosphor from the evaporation source,    wherein the support member is supported and rotated by the support member rotating mechanism in which the stimulable phosphor evaporated from the evaporation source is deposited onto the support member to form a stimulable phosphor layer.