Perfusion imaging
AssigneeKoninklijke Philips Electronics N.V.
InventorsKirsten R. Meetz, Hans-Dieter Nagel
Life of this patent
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Abstract
A method includes determining a plausibility of one or more perfusion parameter maps generated based on perfusion image data and correcting at least one of the perfusion parameter maps when the plausibility for the at least one perfusion parameter map does not satisfy pre-set perfusion parameter plausibility criteria.
Claims19
A method for determining a plausibility of a MTT parameter map generated based on perfusion image data, comprising:
- selecting a first vessel in the image data;
- selecting a second vessel in the image data;
- determining an estimated mean MTT value from contrast flow based on the selected first and second vessels;
- computing a mean MTT value from the MTT parameter map;
- comparing the estimated and the computed mean MTT value;
- and
- validating the MTT parameter map only when a plausibility for the MTT map satisfies a pre-set perfusion parameter plausibility criteria.
A method for determining a CBV parameter map generated based on perfusion image data, comprising:
- obtaining temporal MIP (tMIP) image data;
- creating a vessel mask based on a default pre-set mask threshold;
- generating masked tMIP image data based on the tMIP image data and the mask;
- determining a feature value of the masked image;
- comparing the feature value with a pre-set CBV threshold;
- validating the CBV parameter map only when the feature value is less than the pre-set CBV threshold.
A method for determining a CBV parameter map generated based on perfusion image data, comprising:
- obtaining temporal MIP (tMIP) image data;
- creating a vessel mask based on a default pre-set mask threshold;
- generating masked tMIP image data based on the tMIP image data and the mask;
- generating masked CTA image data based on the CTA image data and the mask;
- comparing the masked tMIP image data and the masked CTA image data;
- and
- validating the CBV parameter map only when a difference between areas of the masked tMIP image data and the masked CTA image data is less than a pre-set area threshold.
Dependencies are inferred from the claim text.