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[[File:3D-PET-SUV.jpg|thumb|3-dimensional [¹⁸F]FDG-PET image with 3D ROI generated by a threshold based algorithm. The blue dot in ...es of cancer patients. It can also be used with other [[Radioactive tracer|PET agents]] especially when no [[arterial input function]] is available for mo ...

...ing and quantifying [[blood flow]] using [[positron emission tomography]] (PET) in the heart, brain and [[tumor]]s. ...energy protons and is therefore used less.<ref name=":0">{{Cite book|title=PET and SPECT of Neurobiological Systems|last=Dierckx|first=Rudi A.J.O.|publish ...