System and method of determining a center of mass of an imaging subject for x-ray flux management control
First Claim
Patent Images
1. A method of centering a subject in a medical imaging device comprising the steps of:
- positioning a subject in a scanning bay;
determining a center of mass of the subject from at least one scout scan and an elevational profile of the subject;
comparing a center of mass of the subject to a reference point; and
repositioning the subject in the scanning bay to reduce a difference in position between the center of mass of the subject and the reference point.
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Abstract
A system and method of diagnostic imaging is provided that includes positioning a subject in a scanning bay, comparing a center of mass of the subject to a reference point, and repositioning the subject in the scanning bay to reduce a difference in position between the center of mass of the subject and the reference point. The present invention automatically selects a proper attenuation filter configuration, corrects patient centering, and corrects noise prediction errors, thereby increasing dose efficiency and tube output.
104 Citations
26 Claims
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1. A method of centering a subject in a medical imaging device comprising the steps of:
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positioning a subject in a scanning bay; determining a center of mass of the subject from at least one scout scan and an elevational profile of the subject; comparing a center of mass of the subject to a reference point; and repositioning the subject in the scanning bay to reduce a difference in position between the center of mass of the subject and the reference point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A computer readable storage medium having stored thereon a computer program representing a set of instructions, which when executed by at least one processor, causes the at least one processor to:
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determine a centroid of a subject; determine a value of mis-centering of the centroid of the subject within a medical imaging device; and adjust a position of the subject within the imaging device to compensate for the value of mis-centering; wherein the at least one processor is further caused to determine the centroid of the subject from at least one of; at least two scout scans; and at least one scout scan and an elevational profile of the subject. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A method of medical imaging comprising the steps of:
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positioning a subject in a medical imaging device; determining a relative position of a centroid of the subject; performing at least one scout scan from which to determine the centroid of the subject; determining a value of mis-elevation of the subject from the relative position of the centroid of the subject; and automatically adjusting an elevation of the subject to reduce the value of mis-elevation. - View Dependent Claims (21, 22, 23, 24)
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25. A tomographic system comprising:
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a rotatable gantry having a bore centrally disposed therein; a table movable within the bore and configured to position a subject for tomographic data acquisition within the bore; a high frequency electromagnetic energy projection source positioned within the rotatable gantry and configured to project high frequency electromagnetic energy toward the subject; a detector array disposed within the rotatable gantry and configured to detect high frequency electromagnetic energy projected by the projection source and impinged on the subject; and a computer programmed to; determine a centroid of the subject; and adjust an elevation of the subject to align the centroid with a reference position; wherein the computer is further programmed to perform at least one scout scan from which to determine the centroid of the subject. - View Dependent Claims (26)
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Specification