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US 6,333,505 B1Granted
Method and apparatus for obtaining radiation image data and solid-state radiation detector
AssigneeFuji Photo Film Co., Ltd.
InventorToshitaka Agano
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AssigneeFuji Photo Film Co., Ltd.
InventorToshitaka Agano
Estimating the term…
A dark current component included in an image signal output from a detector of optical reading type is reduced in a radiation image data obtaining method and apparatus using the detector. A detector having radiation-insensitive areas at both ends of a stripe electrode outside an image area along the longitudinal direction thereof is used. An image signal output from a current detection amplifier is converted into image data having digital values by an A/D converter and input to a memory. A correction data calculation circuit finds correction data gradually decreasing from a starting area to the ending area of vertical scan in accordance with each position of each element along the longitudinal direction thereof, based on image data of the insensitive areas corresponding to the scan starting and ending areas. For each element, a subtraction circuit subtracts the correction data from image data of an image area.
A radiation image data obtaining method for obtaining an image signal representing radiation image information from a solid-state radiation detector having a capacitor for storing an electric charge in accordance with a dose of radiation irradiated thereon and a stripe electrode comprising a plurality of linear electrodes disposed on the capacitor, the solid-state radiation detector having an area insensitive to the radiation, the insensitive area corresponding to a portion of the stripe electrode in the longitudinal direction thereof,
A radiation image data obtaining apparatus comprising a solid-state radiation detector including a capacitor for storing an electric charge in accordance with a dose of radiation irradiated thereon and a stripe electrode comprising a plurality of linear electrodes stacked on the capacitor, and reading means for obtaining an image signal representing radiation image from the solid-state radiation detector, the radiation image data obtaining apparatus being characterized in that:
A solid-state radiation detector including a capacitor for storing an electric charge in accordance with a dose of radiation irradiated thereon and a stripe electrode comprising a plurality of linear electrodes stacked on the capacitor, characterized in that a portion of the stripe electrode has an area which is insensitive to the radiation.
Dependencies are inferred from the claim text.