Radiation image conversion panel and radiation image diagnostic system
AssigneeFuji Photo Film Co., Ltd.
InventorAtsunori Takasu
Life of this patent
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Abstract
A phosphor layer of a radiation image conversion panel has a thickness of 100 to 300 μm and a relative density of 65 to 80%. When a radiation image taken on the conversion panel is reproduced, the size of excitation light d for reading the radiation image satisfies the expressions: d≧5r and d≦3p wherein r is the average column diameter of the columnar crystals in the phosphor layer of the radiation image conversion panel and p is the pixel size of the reproduced image. The radiation image conversion panel and a radiation image diagnostic system using such a conversion panel are suitable for an application such as mammography in which soft tissue is imaged as the principal subject with low radiation energy.
Claims12
A radiation image conversion panel comprising:
- a substrate;
- and
- a stimulable phosphor layer formed by vapor-phase film deposition,
- wherein said stimulable phosphor layer has a thickness of 100 to 300 μm and a relative density of 65 to 80%.
A radiation image diagnostic system for reading a radiation image taken on a radiation image conversion panel that has a stimulable phosphor layer being formed by vapor-phase film deposition and having a thickness of 100 to 300 μm and a relative density of 65 to 80%, and for reproducing the thus read radiation image as a visible image,
- wherein said stimulable phosphor layer has a columnar crystal structure containing columnar crystals and a size of excitation light d for reading said radiation image satisfies expressions:
- d≧5r
- d≦3p,
- wherein r is an average column diameter of said columnar crystals in said stimulable phosphor layer of said radiation image conversion panel and p is a pixel size of the reproduced visible image.
Dependencies are inferred from the claim text.