Stereoscopic X-ray device
AssigneeKabushiki Kaisha Toshiba
InventorsToshio Yamamura, Takeshi Muraki
Life of this patent
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Abstract
A stereoscopic X-ray device used for stereoscopic radiography generates X-rays from a pair of X-ray focal spots. The X-ray device is provided with an evacuated envelope, an X-ray target within the evacuated envelope, and a cathode structure having at least two pairs of filaments. The first pair of filaments form relatively large size X-ray focal spots on the target. The second pair of the filaments form relatively small size X-ray focal spots on the target and are situated between the first pair of filaments on the cathode structure. As a result of these two pairs of focal spots on the X-ray target, a relatively small X-ray device can be used to provide magnification of stereoscopic images of high stereo quality.
Claims9
A stereoscopic X-ray device comprising:
- an evacuated envelope;
- a target within said envelope;
- and
- electron beam means within said envelope for directing electron beams on said target to form at least two pairs of focal spots on said target to generate X-rays, said pairs of focal spots being spaced apart on said target, said electron beam means including first and second filament means, said first filament means having a size larger than said second filament means for forming a first pair of focal spots having a larger size than a second pair of focal spots, said second pair of focal spots being formed by said second filament means and positioned between said first pair of focal spots on said target.
Dependencies are inferred from the claim text.