Radiation tomography device
AssigneeShimadzu Corporation
InventorShiro Oikawa
Life of this patent
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Abstract
In a radiation tomography device, in case a wide photographing area is required, even if a resolution capability in a depth direction of a section of a subject including an intersection of a rotation axis and a radiation irradiating axis is low, a small Laminographic angle α1 is set. In case a high resolution capability is required in the depth direction, even if the photographing area is narrow, a large Laminographic angle α2 is set. Since a balance between the resolution capability in the depth direction of the subject and the photographing area can be adjusted by varying the Laminographic angle, the photographing modes can be freely selected to thereby carry out the tomography suitable for the photographing requirement.
Claims8
A radiation tomography device comprising:
- an irradiating device for irradiating radiations to a subject to be examined;
- a radiation detector situated at a predetermined distance away from the irradiating device for detecting radiation picture images passing through the subject;
- a subject holding and rotating device situated between the irradiating device and radiation detector for holding and rotating the subject around a rotating axis, which intersects in the subject an irradiating axis from the irradiating device to the subject;
- a Laminographic angle variation device attached to at least one of the irradiating device and the subject holding and rotating device, said Laminographic angle variation device varying a Laminographic angle formed by the radiation irradiating axis and the rotating axis, said Laminographic angle variation device being operated such that when a resolution of the radiation picture images in a depth direction is desired to be increased though an irradiation area from the irradiating device at the radiation detector is narrowed, the Laminographic angle is increased, and when the irradiation area from the irradiating device is desired to be increased though the resolution in the depth direction is narrowed, the Laminographic angle is decreased so that as the Laminographic angle is increased, the irradiation area from the irradiating device is narrowed while the resolution of the radiation picture images in a predetermined plane of the subject received at the radiation detector is increased in the depth direction of the subject, to thereby change only the resolution of the predetermined plane by the Laminographic angle variation device without changing a plane to be detected;
- a picture image processing device electrically connected to the radiation detector for obtaining a radiation fault picture image, said picture image processing device storing and calculating the radiation picture images sequentially obtained based on detected data outputted from the radiation detector as the subject is irradiated by the irradiating device and is rotated by the subject holding and rotating device;
- and
- a picture image display device for displaying the fault picture image obtained by the picture image processing device.
Dependencies are inferred from the claim text.