Radiation imaging apparatus
View Patent ↗Radiation detector units provided with solid-state radiation detectors are supported on a supporting section, such that the radiation detector units are located at different distances from a radiation source and arrayed in a one-dimensional direction or two-dimensional directions. One of the radiation detector units is taken as a reference unit. Image size enlargement or reduction processing is performed on each of image signals outputted from the radiation detector units other than the reference unit and in accordance with a ratio between a distance from the radiation source to the reference unit and a distance from the radiation source to each of the radiation detector units other than the reference unit. Image composing processing is performed on the image signal outputted from the reference unit and processed image signals obtained from the image size enlargement or reduction processing.
1. A radiation imaging apparatus, comprising:
i) a plurality of radiation detector units, each of which is provided with a solid-state radiation detector, the solid-state radiation detector being capable of recording image information when radiation carrying the image information is irradiated to the solid-state radiation detector, the solid-state radiation detector outputting an image signal representing the image information having been recorded in the solid-state radiation detector,
ii) a radiation detector unit supporting section for supporting the plurality of the radiation detector units in a state, in which the plurality of the radiation detector units are located at different distances from a radiation source for irradiating the radiation to the plurality of the radiation detector units and are arrayed in a one-dimensional direction or in two-dimensional directions, and
iii) image composing means for:
performing image composing processing on the image signals, which have been outputted from the plurality of the radiation detector units, and in accordance with the array of the plurality of the radiation detector units, and thereby acquiring a composed image signal;
taking one radiation detector unit, which is among the plurality of the radiation detector units, as a reference unit;
performing image size enlargement or reduction processing on each of the image signals, which have been outputted from the radiation detector units other than the reference unit, and in accordance with a ratio between a distance from the radiation source to the reference unit and a distance from the radiation source to each of the radiation detector units other than the reference unit; and thereafter
performing the image composing processing on the image signal, which has been outputted from the reference unit, and processed image signals, which have been obtained from the image size enlargement or reduction processing having been performed on the image signals having been outputted from the radiation detector units other than the reference unit.
2. An apparatus as defined in claim 1 wherein the radiation detector unit supporting section is provided with position adjusting means for adjusting the positions of the radiation detector units with respect to one another.
3. An apparatus as defined in claim 2 wherein the position adjusting means comprises dial meters.
4. An apparatus as defined in claim 3 wherein each of the radiation detector units is provided with a radiation absorbing member for indicating a reference position, which radiation absorbing member is located at an area in the vicinity of an outside periphery of the solid-state radiation detector constituting the radiation detector unit.
5. An apparatus as defined in claim 2 wherein each of the radiation detector units is provided with a radiation absorbing member for indicating a reference position, which radiation absorbing member is located at an area in the vicinity of an outside periphery of the solid-state radiation detector constituting the radiation detector unit.