Radiation image read-out apparatus

A radiation image read-out apparatus, wherein a stimulable phosphor sheet, on which a radiation image has been stored, is scanned with stimulating rays, which cause the stimulable phosphor sheet to emit light in proportion to the amount of energy stored thereon during its exposure to radiation, the radiation image read-out apparatus comprising:

• i) a single light guide member constituted of a light guiding material and comprising;
• a) two input end faces for collecting the light, which is emitted along the scanning line of the stimulating rays and from two surfaces of said stimulable phosphor sheet, and
• b) output end faces for radiating out the light, which has entered into said light guide member from the two input end faces, and
• ii) a single photodetector, which is located in close contact with the output end faces and photoelectrically detects the light having been radiated out of said light guide member,
• wherein the input end faces of said light guide member comprise a first input end face for collecting the light, which is emitted from the front surface of said stimulable phosphor sheet, and a second input end face for collecting the light, which is emitted from the back surface of said stimulable phosphor sheet, and
• the first input end face and the second input end face of said light guide member stand facing the same scanning line.