X-ray grid assembly
First Claim
1. An x-ray grid assembly comprisinga plurality of x-ray absorbent sheets, each comprising a plurality of x-ray transmissive areas arranged in a regular pattern;
- said plurality of x-ray absorbent sheets arranged one atop the other to form a substantially planar stack;
said x-ray transmissive areas of each sheet aligned with the x-ray transmissive areas of the immediately adjacent sheets to form an x-ray transmissive passage through said stack;
an axis of each of said x-ray transmissive passages forming an angle ranging from 40°
to 90°
with the plane of said stack and substantially converging at a single spot;
a first endplate and a second endplate each comprised of an x-ray transmissive material;
said first endplate arranged adjacent a first surface of said stack and said second endplate arranged adjacent a second surface of said stack;
a target and a coolant chamber wherein said coolant chamber disposed between said first endplate and said target and said target is comprised of a target support and an x-ray emitting layer.
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Accused Products
Abstract
An x-ray imaging system according to the present invention comprising a stepped scanning-beam x-ray source and a multi-detector array. The output of the multi-detector array is input to an image reconstruction engine which combines the outputs of the multiple detectors over selected steps of the x-ray beam to generate an x-ray image of the object. A collimating element, preferably in the form of a perforated grid containing an array of apertures, interposed between the x-ray source and an object to be x-rayed. A maneuverable positioner incorporating an x-ray sensitive marker allowing the determination of the precise position coordinates of the maneuverable positioner.
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Citations
24 Claims
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1. An x-ray grid assembly comprising
a plurality of x-ray absorbent sheets, each comprising a plurality of x-ray transmissive areas arranged in a regular pattern; -
said plurality of x-ray absorbent sheets arranged one atop the other to form a substantially planar stack;
said x-ray transmissive areas of each sheet aligned with the x-ray transmissive areas of the immediately adjacent sheets to form an x-ray transmissive passage through said stack;
an axis of each of said x-ray transmissive passages forming an angle ranging from 40°
to 90°
with the plane of said stack and substantially converging at a single spot;a first endplate and a second endplate each comprised of an x-ray transmissive material;
said first endplate arranged adjacent a first surface of said stack and said second endplate arranged adjacent a second surface of said stack;a target and a coolant chamber wherein said coolant chamber disposed between said first endplate and said target and said target is comprised of a target support and an x-ray emitting layer. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An x-ray target assembly comprising
a plurality of x-ray absorbent sheets, each comprising a plurality of x-ray transmissive apertures arranged in a regular pattern and alignment apertures precisely located in the same location on each of said sheets; -
said plurality of x-ray absorbent sheets arranged one atop the other in a frame to form a substantially planar stack, alignment pins occupying said alignment apertures;
said x-ray transmissive apertures of each sheet aligned with the x-ray transmissive apertures of the immediately adjacent sheets to form an x-ray transmissive passage through said stack;
an axis of each of said x-ray transmissive passages substantially converging at a single spot;a first endplate and a second endplate each comprised of an x-ray transmissive material;
said first endplate arranged adjacent a first surface of said stack and said second endplate arranged adjacent a second surface of said stack;said stack and said endplates securely held in said frame; a target comprising a target support and an x-ray emitting layer secured to one end of said frame, and a coolant chamber arranged between said first endplate and said target support. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. An x-ray grid assembly comprising
a first plurality of x-ray absorbent sheets, each comprising a plurality of x-ray transmissive areas arranged in a regular pattern, said first plurality of x-ray absorbent sheets comprised of a material having a high atomic number; -
a second plurality of x-ray absorbent sheets, each comprising a plurality of x-ray transmissive areas arranged in a regular pattern, said second plurality of x-ray absorbent sheets comprised of a material having a low atomic number; said first plurality and second plurality of x-ray absorbent sheets arranged one atop the other to form a substantially planar stack;
said x-ray transmissive areas of each sheet aligned with the x-ray transmissive areas of the immediately adjacent sheets to form an x-ray transmissive passage through said stack;
an axis of each of said x-ray transmissive passages forming an angle ranging from 40°
to 90°
with the plane of said stack and substantially converging at a single spot;a first endplate and a second endplate each comprised of an x-ray transmissive material;
said first endplate arranged adjacent a first surface of said stack and said second endplate arranged adjacent a second surface of said stack;a target and a coolant chamber wherein said coolant chamber is disposed between said first endplate and said target and said target is comprised of a target support and an x-ray emitting layer and said first plurality of sheets are arranged adjacent said first endplate and said second plurality of sheets are arranged adjacent said second endplate. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. An x-ray grid assembly comprising
a plurality of x-ray absorbent sheets, each comprising a plurality of x-ray transmissive areas arranged in a regular pattern; -
said plurality of x-ray absorbent sheets arranged one atop the other to form a substantially planar stack;
said x-ray transmissive areas of each sheet aligned with the x-ray transmissive areas of the immediately adjacent sheets to form a first set and a second set of x-ray transmissive passages through said stack;
the axis of each of said x-ray transmissive passages of said first set forming an angle ranging from 40°
to 90°
with the plane of said stack and substantially converging at a first spot, and the axis of each of said x-ray transmissive passages of said second set forming an angle ranging from 40°
to 90°
with the plane of said stack and substantially converging at a second spot;a first endplate and a second endplate each comprised of an x-ray transmissive material;
said first endplate arranged adjacent a first surface of said stack and said second endplate arranged adjacent a second surface of said stack;
a target and a coolant chamber wherein said coolant chamber is disposed between said first endplate and said target and said target is comprised of a target support and an x-ray emitting layer. - View Dependent Claims (24)
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Specification