Analyzing medical imaging data of a subject from an imaging modality such as positron emission tomography (PET) or SPECT using a tracer are described. Data from detection of tracer emission events are obtained. A rate of change of emission events per unit time for a given region is then calculated, for example by obtaining a number of emission events in each sub-period in the given region, and fitting a line through the values for the sub-periods. This may be used to compare the rates of change of organs processing or accumulating the tracer with a model of expected result from the organ. This may be used in particular to detect cancer of the kidneys and/or bladder an distinguish this from inflammation.
Methods and apparatus for analyzing medical imaging data