Radiation image conversion panel
View Patent ↗A radiation image conversion panel includes a substrate and a phosphor layer formed on the substrate by a vapor-phase deposition method. The phosphor layer has a columnar crystal structure and the columnar crystal structure accounts for 50 to 65% of the phosphor layer in terms of relative density. The panel requires a smaller quantity of erasing light and hence is suitable for application in a small type of radiation image information recording and reading apparatus.
1. A radiation image conversion panel comprising:
a substrate; and
a phosphor layer formed on said substrate by a vapor-phase deposition method,
wherein said phosphor layer has a columnar crystal structure and said columnar crystal structure accounts for 50 to 65% of said phosphor layer in terms of relative density,
wherein said relative density (%)=M2/M1×100, where
M1(g)=weight of the phosphor layer=product of volume occupied by the phosphor layer (including voids) and the inherent density of the phosphor, and
M2(g)=actual weight of the phosphor layer.
2. The radiation image conversion panel according to claim 1 , wherein said phosphor layer is formed of an alkali metal halide based stimulable phosphor.
3. The radiation image conversion panel according to claim 2 , wherein said alkali metal halide based stimulable phosphor is a cesium halide based stimulable phosphor.
4. The radiation image conversion panel according to claim 1 , wherein said columnar crystal structure accounts for 50 to 60% of said phosphor layer in terms of relative density.