Spot-size effect reduction
First Claim
1. A radiographic imaging device, comprising:
- an X-ray source for emitting a beam of X-ray radiation toward an object, the X-ray source having a finite focal spot characterized by an X-ray intensity distribution;
a detector assembly for receiving at least part of the X-ray radiation after the X-ray radiation passes through the object and producing a signal in response thereto; and
an image processor configured to construct an image from the signal generated by the detector,wherein the image processor constructs the image by;
scaling the intensity distribution for a first object layer;
scaling the intensity distribution for a second object layer;
aggregating the first and second scaled intensity distributions; and
applying a filter to the aggregated scaled intensity distributions.
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Accused Products
Abstract
A radiographic imaging device includes an X-ray source having a finite focal spot characterized by a determined intensity distribution. The X-ray source emits a beam of X-ray radiation toward an object. A detector assembly receives at least part of the X-ray radiation after it passes through the object. The detector assembly produces a signal in response to the received radiation. An image processor constructs an image from the signal generated by the detector assembly using the determined intensity distribution of the X-ray source. By inverse filtering the aggregated detector image from the detector assembly, the effects of the finite focal spot size of the X-ray source are mitigated, improving the quality of the resulting image.
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Citations
16 Claims
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1. A radiographic imaging device, comprising:
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an X-ray source for emitting a beam of X-ray radiation toward an object, the X-ray source having a finite focal spot characterized by an X-ray intensity distribution; a detector assembly for receiving at least part of the X-ray radiation after the X-ray radiation passes through the object and producing a signal in response thereto; and an image processor configured to construct an image from the signal generated by the detector, wherein the image processor constructs the image by;
scaling the intensity distribution for a first object layer;
scaling the intensity distribution for a second object layer;
aggregating the first and second scaled intensity distributions; and
applying a filter to the aggregated scaled intensity distributions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for mitigating the effect of finite focal spot size in a radiographic imaging device, the radiographic imaging device having an X-ray source having a finite focal spot for emitting X-ray radiation toward an object so that at least part of the X-ray radiation passes through the object, comprising:
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determining an intensity distribution for the X-ray source; receiving at least part of a beam of X-ray radiation emitted by the X-ray source after the beam of X-ray radiation passes through the object and producing a signal in response thereto; constructing an image from the signal generated by the detector by; scaling the intensity distribution for a first object layer; scaling the intensity distribution for a second object layer; aggregating the first and second scaled intensity distributions; and filtering the aggregated scaled intensity distributions, and displaying the image on a display console. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification