X-ray diagnostic apparatus for allowing stereoscopic visualization on X-ray images of an object under examination
First Claim
1. An X-ray diagnostic apparatus for allowing stereoscopic visualization on X-ray images of an object under examination, comprising:
- means for irradiating and projecting intermittently X-rays toward the object at two different projection angles in relation to the object, thereby intermittently producing at least first snd second X-ray transmission images;
first conversion means for converting the first and second X-ray transmission images into first and second electron images and finally into first and second visual images in synchronism with the X-ray projections, and for deviating center positions of the first and second visual images at its output focal plane by deflecting the first and second electron images;
second conversion means having at least first and second conversion regions and converting the first and second visual images intermittently incident upon the first and second conversion regions respectively into first and second video signals; and
,means for controlling the X-ray irradiating and projecting means, the first conversion means and the second conversion means in such a manner that the first and second X-ray transmission images are alternately produced, converted and deviated at the output focal plane, and when the first visual image is incident upon the first conversion region, electrical scanning of the first conversion region is blanked out for an optical storage of the first visual image therein, and also electrical scanning of the second conversion region, upon which the second visual image has been previously incident, is performed.
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Accused Products
Abstract
An X-ray diagnostic apparatus for allowing stereoscopic visualization on X-ray images of an object under examination includes at least a stereoscopic X-ray tube, a deflection coil type X-ray image intensifier, and a single television camera. The right-viewed and left-viewed X-ray visual images are alternately output from the image intensifier with a given deviation between centers of those images. Those visual images are alternately incident upon the respective image conversion regions of the TV camera, whereby the electrical scanning is also done alternately for each of the image conversion regions so as to prevent the after-image effect.
51 Citations
11 Claims
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1. An X-ray diagnostic apparatus for allowing stereoscopic visualization on X-ray images of an object under examination, comprising:
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means for irradiating and projecting intermittently X-rays toward the object at two different projection angles in relation to the object, thereby intermittently producing at least first snd second X-ray transmission images; first conversion means for converting the first and second X-ray transmission images into first and second electron images and finally into first and second visual images in synchronism with the X-ray projections, and for deviating center positions of the first and second visual images at its output focal plane by deflecting the first and second electron images; second conversion means having at least first and second conversion regions and converting the first and second visual images intermittently incident upon the first and second conversion regions respectively into first and second video signals; and
,means for controlling the X-ray irradiating and projecting means, the first conversion means and the second conversion means in such a manner that the first and second X-ray transmission images are alternately produced, converted and deviated at the output focal plane, and when the first visual image is incident upon the first conversion region, electrical scanning of the first conversion region is blanked out for an optical storage of the first visual image therein, and also electrical scanning of the second conversion region, upon which the second visual image has been previously incident, is performed. - View Dependent Claims (2, 3, 4, 5)
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6. An X-ray diagnostic apparatus for allowing stereoscopic visualization on X-ray images of an object under examination, comprising:
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means for irradiating and projecting sequentially X-rays toward the object at two different projection angles with respect to the object to sequentially produce at least first, second, third and fourth X-ray transmission images respectively; first conversion means for converting all of the X-ray transmission images into first, second, third and fourth electron images and finally into first, second, third and fourth visual images respectively in synchronism with the X-ray projections, and for deviating center positions between two relative visual images of the first, second, third and fourth visual images at its output focal plane by deflecting two relative electron images; second conversion means having at least first and second conversion regions and converting all of the visual images into first, second, third and fourth video signals; means for injecting an X-ray contrast medium into a diagnostic portion of the object in synchronism with the X-ray projections in such a manner that at least the first and second X-ray video signals are obtained as mask image signals before the X-ray contrast medium is penetrated in the diagnostic portion and at least the third and fourth X-ray video signals are obtained as contrast image signals after the X-ray contrast medium is penetrated therein; means for digitally processing two relative video signals from the first, second, third and fourth video signals so as to derive at least a digital subtraction image signal; and means for controlling the X-ray irradiating and projecting means, the first and second conversion means, the injecting means, and the menas for digitally processing in such a manner that the first, second, third and fourth X-ray transmission images are sequentially produced in relation to the penetration of the X-ray contrast medium, converted and deviated at the output focal plane, when one of said two relative visual images is incident upon the first conversion region, electrical scanning of the first conversion region is blanked out for an optical storage of its visual image, and also electrical scanning of the second conversion region, upon which the remaining of said two relative visual images has been previously incident, is performed, said means for performing, carrying out digital subtraction of the two relative video signals. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification