Post injection interval time correction of SUV in static PET scans

摘要

Methods and apparatus for analyzing and correcting medical imaging data of a subject are described, for example Positron Emission Tomography(PET) with a view to improving the assessment of the Standardized Uptake Value(SUV) of a radio tracer. A first image data set is obtained from a scan of the subject at a first time point with respect to a defined time origin. A first measurement of a time dependent variable is then determined for the first data set, and a first estimate value for the time dependent variable at a first estimate time point is extrapolated from the first data set. The method may also involve obtaining a second image data set at a second time point, determining a second measurement of a time dependent variable and comparing the first estimate of the variable with the second measurement of the variable thus allowing a comparison of a value at for example a different post injection(PI) interval to be made. These estimates/measurements may then be used to correct the value for the uptake of the radioactive tracer.