System and method of medical imaging having default noise index override capability
First Claim
Patent Images
1. A method of processing imaging data for a radiation emitting medical imaging device, the method comprising:
- receiving an image application identifier;
receiving a set of scan parameter values;
automatically generating a predicted noise index from the received set of scan parameter values;
generating an X-ray tube current profile based at least on the predicted noise index;
allowing user override of the automatically generated predicted noise index based on the X-ray tube current profile and setting a preferred noise index if so selected by a user, and if a preferred noise index is set, generating a final tube current profile; and
acquiring imaging data with the final tube current profile.
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Abstract
A system and method of medical imaging is designed to reduce a patient'"'"'s X-ray exposure during scanning. The system automatically generates a default noise index from a received set of scan parameter values that specifies a desired tube current of an X-ray source to use during the scanning of a patient. The default noise index can then be overridden to select a preferred noise index based upon a desired diagnostic quality for a particular volume of interest (VOI) and a diagnostic objective.
47 Citations
37 Claims
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1. A method of processing imaging data for a radiation emitting medical imaging device, the method comprising:
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receiving an image application identifier;
receiving a set of scan parameter values;
automatically generating a predicted noise index from the received set of scan parameter values;
generating an X-ray tube current profile based at least on the predicted noise index;
allowing user override of the automatically generated predicted noise index based on the X-ray tube current profile and setting a preferred noise index if so selected by a user, and if a preferred noise index is set, generating a final tube current profile; and
acquiring imaging data with the final tube current profile. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of processing imaging data for a radiation emitting medical imaging device, the method comprising:
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acquiring imaging data of a subject;
generating a set of projections for an VOI having a plurality of sub-volumes;
acquiring a target noise index;
generating a tube current profile for a radiation emitting tube according to the target noise index; and
enabling interactive adjustment of the generated tube current profile to convey a dose specific for each sub-volume in the VOI such that diagnostic quality is variable across the VOI. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A computed tomography system comprising:
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a high frequency electromagnetic energy projection source to project high frequency energy towards an object;
a detector to receive high frequency electromagnetic energy attenuated by the object;
a plurality of electrical interconnects configured to transmit detector outputs to a data processing system; and
a computer programmed to;
construct a plurality of initial projections for an VOI;
receive a user input to generate a target noise index;
generate a tube current profile for the high frequency electromagnetic energy projection source according to the target noise index and a predicted noise index;
display the tube current profile on a console wherein the tube current profile can be modulated for one or more portions of the VOI;
adjust a scan dose for one or more portions of the VOI based on user modulation of the tube current profile; and
acquire imagine data for the VOI. - View Dependent Claims (21, 22, 23, 24, 25)
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26. A computer-readable medium having stored thereon a computer program having a set of instructions that, when executed by a computer, causes the computer to:
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acquire pre-scan data of an VOI of a subject;
generate a predicted noise index from the pre-scan data;
generate a tube current profile for a radiation source designed to project radiation at a subject during data acquisition based upon the predicted noise index and a target noise index; and
receive selective adjustments of at least a portion of the tube current profile to adjust a scan dose for a corresponding portion of the VOI based on user analysis of the tube current profile. - View Dependent Claims (27, 28, 29, 30, 31)
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32. A radiation emitting medical device comprising:
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means for receiving scan parameters;
means for adjusting the scan parameters automatically to generate a desired target image quality across a VOI for a patient;
means for modifying a radiation tube profile based on the adjusted scan parameters to account for sub-volumes of elevated interest such that radiation dose to the sub-volumes of elevated interest exceeds that of other sub-volumes of the VOI; and
means for scanning the patient using the modified radiation tube current profile to reconstruct an image of the patient with image quality for the sub-volumes of elevated interest exceeding that of the other sub-volumes of the VOI. - View Dependent Claims (33, 34, 35, 36, 37)
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Specification