Beam forming apparatus
First Claim
1. An X-ray apparatus comprising:
- an X-ray source for emitting X-ray radiation; and
a beam chopping apparatus coupled to said X-ray source, wherein said beam chopping apparatus is adapted to rotate, receive said X-ray radiation and form a moving beam spot having a variance in frequency, wherein said variance in frequency decreases as said beam chopping apparatus is rotated faster.
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Accused Products
Abstract
The present specification discloses a beam chopping apparatus, and more specifically, a helical shutter for an electron beam system that is employed in radiation-based scanning systems, and more specifically, a beam chopping apparatus that allows for variability in both velocity and beam spot size by modifying the physical characteristics or geometry of the beam chopper apparatus. The present specification also discloses a beam chopping apparatus which provides a vertically moving beam spot with substantially constant size and velocity to allow for substantially equal illumination of the target. In addition, the present specification is a beam chopping apparatus that is lightweight and does not cause an X-ray source assembly employing the beam chopper to become heavy and difficult to deploy.
274 Citations
19 Claims
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1. An X-ray apparatus comprising:
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an X-ray source for emitting X-ray radiation; and a beam chopping apparatus coupled to said X-ray source, wherein said beam chopping apparatus is adapted to rotate, receive said X-ray radiation and form a moving beam spot having a variance in frequency, wherein said variance in frequency decreases as said beam chopping apparatus is rotated faster. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An X-ray apparatus comprising:
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an X-ray source for emitting X-ray radiation; and a beam chopping apparatus coupled to said X-ray source, wherein said beam chopping apparatus rotates and comprises a hollow cylinder with a first end and a second end defining a length of said cylinder and at least one helical aperture extending substantially along said length, wherein said cylinder is adapted to receive said X-ray radiation and emit said X-ray radiation, having a variance in frequency, through said helical aperture and wherein said variance in frequency decreases as said beam chopping apparatus is rotated faster. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification