Methods and apparatus for dose verification in an imaging system
First Claim
1. A method of determining x-ray dose in an imaging system, the imaging system including a detector array having at least two rows of detector cells displaced along a z-axis, an x-ray source for radiating an x-ray beam toward the detector array and an adjustable collimator, said method comprising the steps of:
- scanning an object;
determining an image noise of the scanned object; and
determining a collimator z-axis aperture using the detector array.
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Abstract
The present invention, in one form, is a system which, in one embodiment, utilizes signals from a detector array to verify system dose. More specifically, the detector array signal intensities are used to determine image noise and a collimator aperture to verify an x-ray dosage. Particularly, in one embodiment, the signals intensities from the detector array are used to determine the position of collimator cams. Using the position of the collimator cams, the aperture of the collimator is determined so that X-ray dose may verified using the collimator aperture and image noise information.
24 Citations
26 Claims
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1. A method of determining x-ray dose in an imaging system, the imaging system including a detector array having at least two rows of detector cells displaced along a z-axis, an x-ray source for radiating an x-ray beam toward the detector array and an adjustable collimator, said method comprising the steps of:
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scanning an object; determining an image noise of the scanned object; and determining a collimator z-axis aperture using the detector array. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for determining x-ray dose in an imaging system, the imaging system including a detector array having at least two rows of detector cells displaced along a z-axis, an x-ray source for radiating an x-ray beam toward the detector array and an adjustable collimator, said system configured to:
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scan an object; determine an image noise of the scanned object; and determine a collimator z-axis aperture using the detector array. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An imaging system comprising a multislice detector array having at least two rows of detector cells displaced along a z-axis, an x-ray source for radiating an x-ray beam toward the detector array, a pre-patient collimator having an aperture said system configured to:
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scan an object; determine image noise of the scanned object; and determine a collimator z-axis aperture using the detector array. - View Dependent Claims (22, 23, 24, 25, 26)
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Specification