Radiation image detecting device and radiation imaging system
First Claim
1. A radiation image detecting device for carrying out imaging by using a scattered radiation removing grid having radiation absorbing portions for absorbing radiation and radiation transmitting portions for transmitting said radiation alternately and periodically arranged in a first direction, said radiation image detecting device comprising:
- a detection panel having an imaging surface provided with a plurality of pixels for converting said radiation into an electric signal, for detecting a radiographic image of an object;
a plurality of dose detection sensors provided for performing exposure control of said radiographic image, said plurality of dose detection sensors being disposed in said imaging surface periodically with leaving space in said first direction, for detecting a dose of said radiation passed through said object and outputting a signal in accordance with said dose; and
an arrangement period of said radiation absorbing portions being different from an arrangement period of said plurality of dose detection sensors in said first direction in said imaging surface,wherein an arrangement period of said dose detection sensors in a second direction orthogonal to said first direction is also different from said arrangement period of said radiation absorbing portions.
1 Assignment
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Accused Products
Abstract
A detection panel has a plurality of pixels for accumulating electric charge by receiving X-rays, and a plurality of detection pixels for detecting an X-ray dose in an imaging surface. The detection pixels are disposed periodically with leaving space. A grid, which has X-ray absorbing portions and X-ray transmitting portions alternately and periodically arranged in a first direction, is disposed in a position opposed to the imaging surface. Since an arrangement period of the detection pixels in the first direction is different from an arrangement period of the X-ray absorbing portions, an output value of each detection pixel is distributed and hence the average of the output values has a reduced variation range.
13 Citations
13 Claims
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1. A radiation image detecting device for carrying out imaging by using a scattered radiation removing grid having radiation absorbing portions for absorbing radiation and radiation transmitting portions for transmitting said radiation alternately and periodically arranged in a first direction, said radiation image detecting device comprising:
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a detection panel having an imaging surface provided with a plurality of pixels for converting said radiation into an electric signal, for detecting a radiographic image of an object; a plurality of dose detection sensors provided for performing exposure control of said radiographic image, said plurality of dose detection sensors being disposed in said imaging surface periodically with leaving space in said first direction, for detecting a dose of said radiation passed through said object and outputting a signal in accordance with said dose; and an arrangement period of said radiation absorbing portions being different from an arrangement period of said plurality of dose detection sensors in said first direction in said imaging surface, wherein an arrangement period of said dose detection sensors in a second direction orthogonal to said first direction is also different from said arrangement period of said radiation absorbing portions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A radiation imaging system for carrying out imaging by using a scattered radiation removing grid having radiation absorbing portions for absorbing radiation and radiation transmitting portions for transmitting said radiation alternately and periodically arranged in a first direction, said radiation imaging system comprising:
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(A) a radiation generating device including a radiation source for emitting radiation; and (B) a radiation image detecting device for detecting a radiographic image, including; a detection panel having an imaging surface provided with a plurality of pixels for converting said radiation emitted from said radiation source into an electric signal, for detecting said radiographic image of an object; a plurality of dose detection sensors provided for performing exposure control of said radiographic image, said plurality of dose detection sensors being disposed in said imaging surface periodically with leaving space in said first direction, for detecting a dose of said radiation passed through said object and outputting a signal in accordance with said dose; and an arrangement period of said radiation absorbing portions being different from an arrangement period of said plurality of dose detection sensors in said first direction in said imaging surface, wherein an arrangement period of said dose detection sensors in a second direction orthogonal to said first direction is also different from said arrangement period of said radiation absorbing portions.
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Specification