The stimulable phosphor panel includes a rigid substrate, a stimulable phosphor layer formed on the rigid substrate and a transparent moisture-resistant protective layer formed on the stimulable phosphor layer. The stimulable phosphor layer is housed and sealed in an airtight area formed between the rigid substrate and the transparent moisture-resistant protective layer. The panel further includes a buffer space communicating with the airtight area capable of expansion/contraction. The buffer space is defined by a recess formed in the substrate, a ventilation hole connecting the recess with the airtight area and being formed in the substrate, and a flexible sheet covering an opening of the recess. Or, the buffer space has a volume variable within a range from 1/10 to twice of a sum of a spatial volume of the airtight area and a volume of the buffer space at 1 atm.

 
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