System and method of determining a user-defined region-of-interest of an imaging subject for x-ray flux management control
First Claim
Patent Images
1. A method of imaging comprising the steps of:
- positioning a subject in an imaging device;
performing at least one scout scan;
marking a user-defined region-of-interest (ROI); and
automatically adjusting an attenuation characteristic of an attenuation filter based on the user-defined ROI.
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Abstract
A system and method of diagnostic imaging is provided that includes positioning a subject in an imaging device, performing at least one scout scan, and marking a user-defined region-of-interest. An attenuation characteristic of an attenuation filter is then automatically adjusted based on the user-defined region-of-interest. 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.
186 Citations
22 Claims
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1. A method of imaging comprising the steps of:
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positioning a subject in an imaging device; performing at least one scout scan; marking a user-defined region-of-interest (ROI); and automatically adjusting an attenuation characteristic of an attenuation filter based on the user-defined ROI. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. 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; 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 by the subject; an attenuation filter positioned between the high frequency electromagnetic energy projection source and the subject; and a computer programmed to; display a user interface including an illustration of a position of the subject and allow selection of a ROI; and determine an attenuation profile of the attenuation filter based on the user-selected ROI. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A computer readable storage medium having stored thereon a computer program representing a set of instructions which, when executed by at least one processor, cause the at least one processor to:
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perform at least one scout scan; display an interface including a reconstructed image from the at least one scout scan; receive user-selection identifying a ROI; and adjust at least one of an attenuation filter configuration and a subject position based on the ROI. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification